I put drilled-slotted-vented-carbon rotors on my Prius and now it stops so hard my wife's dentures fly out every time.
@eddiesaninocencio66355 жыл бұрын
Damm, my wife hits me when i brake.
@theprofessional6775 жыл бұрын
chazwazzum lmao
@sodapopkid125 жыл бұрын
chazwazzum WHAT HELL? OLD PEOPLE SHOULDN’T DRIVE THAT FAST 😆😆😆
@PreciseAimm5 жыл бұрын
😭
@mlee60505 жыл бұрын
@@sodapopkid12 who says he drive fast? it braking hard that cause it lol even some who brake from about 20mph can sometimes get you leave your seat
@ZepG8 жыл бұрын
The drilled rotors not only look cool but according to ricers add 20 hp.
@bbqbacon80678 жыл бұрын
😂😂
@SPINERbg8 жыл бұрын
+Mike Copper *аudible chuckle*
@dumbcow18 жыл бұрын
that's only if used in conjunction with red calipers. drilled by itself is only +10hp
@j3d898 жыл бұрын
+Bryan Parks those are cheap.. chinese versions.. get the one that has red caliper branded Rembo..you might get 30hp
@ZepG8 жыл бұрын
No joke, I just bought slotted ebc rotors and yellow g2 caliper paint lol. But since mine are not drilled or red I'm only looking at a 5 hp increase.
@racekar806 жыл бұрын
I have to comment, I have a Porsche 997 Carrera that I track, I am a DE instructor with many years experience. My car came with drilled rotors and I added track pads, car stopped very well. Unfortunately as you stated the rotors eventually cracked between the holes. I switched to slotted rotors and immediately noticed a reduction in braking force. After many sets I went back to drilled rotors and the braking is much better. Just a personal observation, Porsche knows why the holes are there, it's not just looks.
@EngineeringExplained6 жыл бұрын
Thanks for sharing your experience with it!
@Lostsage016 жыл бұрын
My understanding of the reasoning behind drilled rotors is that it helps with initial pad bite, probably why Porsche installed them from the factory. I had a similar experience to you installing a drilled set on my 350z, noticeable improvement. I probably wouldn’t track the car with a drilled set given the risk of cracking, but it definitely helped improve braking on the street.
@natehess76635 жыл бұрын
Ive put alot of brakes on many different vehicles and used the cross drilled with slotted type rotors on multiple vehicles. My rx7, odyssey minivan, even moms rx350. And theyve all made a good improvement in my opinion. All the cars stopped better especially when hard on the brakes. Even Dad commented on how good moms Rx stopped with them. I think most people its not needed. But if u r a car guy you will definitly appreciate them and they r one of the easiest upgrades u can do for almost any car now from a honda civic to a mustang and even an Odyssey minivan lol. You guys watching this channel will b happy u did them. I can say i didnt put on super high end brands either mostly the MAX BRAND FROM CANADIAN STEEL ON EBAY. OR CALLAHAN FROM EBAY AMAZON. THE KITS WITH PADS WOULD RUN $120-150 PER PAIR. KEEP IN MIND MOST CARS WILL BENIFIT FROM THE FRONT BY FAR THE MOST. SO YOU REALLY ONLY NEED THE FRONT. UNLESS ITS A HEAVY TRUCK THAT USES REAR BRAKES ALOT MORE. BUT MOST CARS THE FRONT BRAKES DO 80-90% OF THE BRAKING. I AM A HONDA TOYOTA GUY. U KNOW WHO U R. GO GET THEM U WONT REGRET IT.
@alexandermartincausey73334 жыл бұрын
@@natehess7663 This Uber driver will be taking your advice!
@fernandofragoso41184 жыл бұрын
racekar80 the slotted ones were also high carbons as the originals are?
@superhydrocarbon8 жыл бұрын
Man, your videos are simply fantastic! Such high quality content and they make perfect sense! Amongst the best channels on KZfaq!
@EngineeringExplained8 жыл бұрын
+superhydrocarbon Thank you, I really appreciate it!
@jdubdoubleu8 жыл бұрын
+Engineering Explained I wish I had your knowledge about vehicles. Never stop making videos!!
@scwarzewaffe858 жыл бұрын
+Engineering Explained Hi Jason,big fan of your Channel and subscriber too.. Can you cover motorcycle engines and the advantages /disadvantage of high specific output high rpm engines. Scott.
@GreyhatInfiltrator8 жыл бұрын
+superhydrocarbon I totally agree with you. I've been learning quite a lot from his videos.
@superhydrocarbon8 жыл бұрын
+TheGray Aviator Absolutely! Lots of effort put in by the guy! I also like Chris Fix for his slightly offbeat but super practical and honest car fixes and tips. Do check it out!
@maneki9neko8 жыл бұрын
There are functional advantages to using drilled rotors. Why this is so is a little complicated, and takes a few paragraphs to explain. (see below). That there are advantages is well established, and this is mostly their ability to bring a high performance pad up to peak temperature very rapidly. This is useful on lighter weight, performance oriented street cars and some forms of racing where the brake loads are intermittent. Drilled rotors are used on the street versions of high-performance cars which will never see any serious track time, but which may be driven quite vigorously from time to time. Sprint car racers also prefer them. All of this general group of performance cars driven mostly on the street [e.g. Lotus Elise, or Porsche Cayman] have brake pads with friction coefficients that increase as temperatures go up. These pads need to be warm to have the optimum response, and improved feel, during braking. Brake pads do not conduct heat well. Some have copper threads added to improve conduction, but basically a pad does not conduct much heat. The primary path for heat conduction out of the pad, is into the rotor. When a rotor is drilled or slotted the area for heat transfer out of the pad is reduced, and so the pad rises to 'operating temperature' much more quickly the same pad will come to temperature with a plain surfaced rotor. For a car equipped with higher temperature pads that is not driven on a circuit track, drilling or slotting the disk, reduces heat transfer out of the pads, bringing the brakes into their optimum working temperature immediately, the first time they are applied. There is no need for this rapid warm up on a car driven on a long circuit track, where the brakes are brought to temperature in the first turn and remain hot throughout the race. There are forms of racing in which drilled rotors are very much preferred. Drag racing is an obvious application. In this form of racing the brake pad must be brought to temperature very quickly and their brake disks are perforated to the point of looking like lace. Lighter weight open wheel cars like Sprint racers prefer drilled and/or perforated rotors, because braking loads are moderate, and the cooling of the disk itself is very rapid. Many 'sport' motor cycles use drilled rotors for this reason as well. These are all applications where drilled rotors are used for functional reasons. Drilled rotors, unlike slotted rotors, pump air through the holes as the leading edge of the brake pad approaches the hole. In a centrally vented rotor, the vanes in the center vent draw air from the holes and sling it outward in a continuous cooling loop. So drilled and perforated rotors have the advantage that while the pad heats more quickly, and the rotors themselves, having less mass may also spike in temperature, they also lose that heat very rapidly. For intermittent braking this is an advantage. For circuit racing drilled and slotted disks are generally a disadvantage. For rally cars, slotted are often preferred. Pad wear is greater, but so the braking, and that is to be expected. While the adhesives in brake pads no longer off-gas as badly as they once did, this is not the only source of gas between the pad and the rotor. Steam can be a serious problem in the initial applications of wet disk brakes. While driving in rain, drilled rotors provide an exit path for steam in a way other rotors do not. So there are all sorts of applications in which perforated rotors excel. And these applications have nothing to do with appearance. The limitation for drilled rotors is the potential for cracking. Cracking around the outermost holes can occur either when the rotor is used above its temperature range or when the quality of the casting is poor. There is no down side to using a drilled rotor in applications in which the heavy loads are intermittent, and there are many advantages, especially for lower power and lighter weight performance oriented cars.
@diegojimenez69728 жыл бұрын
+maneki9neko I was under the impression that on motorcycles drilled rotors were primarily for 1 weight and 2 get all the mud, water crap out of there
@maneki9neko8 жыл бұрын
+Diego Jimenez Getting the water and steam out is a really good idea on an exposed brake and cross drilling helps there. So do vertical slots in the brake pad. Both help. Drilling simply does not remove much weight, so there are better ways to remove the unsprung weight of a brake and caliper. Using aluminum for the body of the caliper, in preference to cast iron removes a lot. So does using an aluminum hub and a cast iron disk, as is commonly done with the Wilwood series of brakes. So cross drilling for weight reduction is not a strong motivation unless the brake disk is truly reduced to 'lace' as you will find on dragsters. Cross drilling is useful in a very specific niche of application. Consider the following: I drive a Miata in the mountains, and I will gain and lose a mile of altitude in a couple of hours. I work the brakes hard, but not as hard as a racer would because I am on public roads. My disks will go up to 1000F. I know this because I have measured them with a radiometer. So the stock brake pads do not work for me. The stock pad overheats. And the glue or binder from the pad, melts or burns on to the disk. As is mentioned by others posting on this page, when this happens, it feels like the disk is warped. But when you go to turn the brake disk you discover the disk is not warped at all; it just has a bit of a deposit in a few places from the brake getting fused onto the disk. So people like me with sporty vehicles driven hard, need a higher temperature pad, to survive the heat. But brake pads with higher temperature compounds, change their performance characteristics as they heat up. When they are cold they are 'okay' but when they are hot they are 'terrific'. Since people like me do not drive on a closed course, the pads do not heat up on the first turn, and remain hot for the rest of the drive. For our cars, which are driven hard but only on an intermittent basis, something needs to be done to cause the pads to come to temperature faster, and not over heat. Drilled disks reduce the heat transfer coefficient, by reducing the contact area, between pad and disk. So pads working on a drilled rotor come to temperature faster. This can be measured. The disks also cool faster than a solid disk, between applications of the brake pedal, when they are hot. So the temperature of a drilled rotor, and pad which rides on it, tends to spike faster and higher than a conventional disk. The disk also cools from that spike more quickly when the pressure is off the pad. I, and others, have measured this with radiometers. The measurement is an easy one with the right tool. And this is why you will find drilled rotors on Porsche Caymans, on Boxsters, on M Series BMWs, on AMG Mercedes, on the Lotus Elise and similar cars. This is not 'bling' or ornamentation. The engineers at these facilities know what they are doing. These are cars which are driven primarily on the street, which have higher temperature pads. The pads need heat to function in their optimum zone. And the brake needs to be cooled from that heat sooner. A cross drilled disk does both. The temperature spikes fast during brake application, and the disk cools from that temperature more quickly. Racing is q completely different story. Circuit racers do not use drilled disks for the most part, except in some special applications. In Sprint Car racing, or with lighter weight, lower power, open wheel race cars these some times benefit from the use of drilled disks. Heavier, higher power cars driven on a track generally do not benefit from a drilled disk. A lot of people think that drilled rotors are decorative, or are of the past. In the right application cross drilled rotors have an important function. This, and not tradition, is why you will see them installed as factory equipment on sporty vehicles with 'hot brakes' which are not driven continuously on a closed track.
@darrencurry44297 жыл бұрын
I had thought that drilled helped remove water as well, but this isn't true. I had an issue with a BMW some years ago where it would get water (rain) on the rotor and the brakes would take literally a second before they would grab. I thought if I replaced the plain rotors with drilled (non-slotted) it would fix the problem, but it didn't.
@jeffbui7 жыл бұрын
My Mercedes S500 came from the factory with drilled rotors on the fronts. It's definitely not a performance car but the engineers put them in for a reason.
@maneki9neko7 жыл бұрын
@Darren Curry: You might have 'glazed' or otherwise contaminated pads. Drilled, slotted or plain rotors with clean pads should not take so long to grab. The time should be a small fraction of a second.
@joscythe5569 жыл бұрын
I'd be intersted in a video about "brembo style" brake calipers (4 pot, 6 pot, 8 pot...) compared to conventional style brake calipers
@TheJediJoker7 жыл бұрын
What you mean to say is "fixed," with pistons on both sides of the caliper, as opposed to the more common "floating" or "sliding" caliper with pistons on only one side.
@hahasimpsons7 жыл бұрын
but but but everyone on NASIOC knows that Brembo is better lmao
@Abb0nz17 жыл бұрын
Brembo is a brand, not a style. All disc brakes (as far as I'm aware) range from a single piston, or "pot", through to 8 pistons ( I haven't heard of anything higher than 8 although I stand to be corrected).
@ilya.b7 жыл бұрын
Google "Tarox Brakes", you'll be surprised. ;-)
@BananenBoerBob6 жыл бұрын
If you ever want to see an insane number of pistons on a caliper check out the Evolvo Volvo C30. That one runs 14 pistons.
@MickaelMaddison8 жыл бұрын
On my minivans I switched to drilled and slotted discs as a method of cooling the disks faster. The stock discs were continually warping because of the long steep hills near my home. Switching has proven to be very effective as my discs have not warped for years since the switch. I go through pads more frequently but they are cheaper and easy to replace.
@Paulog19909 ай бұрын
I know it’s 7 years later I’m commenting but I have a similar situation. Go up and down hills every time I leave my house. So have to ride the brakes often which has led to frequent rotor failure.
@rado2g6 ай бұрын
@@Paulog1990 Alternatively you could just drive in a lower gear when going downhill and not use the brakes as frequently.
@Paulog19906 ай бұрын
@@rado2g I have a Nissan with a CVT. If you know anything about Nissan CVT’s, that’s the last thing I would try.
@rado2g6 ай бұрын
@@Paulog1990 not familiar with it, I drive a manual Audi A4 B8
@johnchalkiadakis5 ай бұрын
@@Paulog1990😢😢😢
@theprofessional6775 жыл бұрын
To everyone, remember this, TORQUE YOUR LUGNUTS, reduces warping.
@jons46864 жыл бұрын
Could be true. I've never heard this before but it couldn't hurt.
@thisismagacountry13184 жыл бұрын
You were great against Gary Oldman. Too bad he snuck up on you at the end.
@pacific3224 жыл бұрын
Thanks for the advice, I dealt with warped rotors in the past.
@devilshoez10984 жыл бұрын
Sad that "car people" need to be told this. Even without the worry of rotorwarp, just keep your nuts tight, but not too tight!
@ejer.4 жыл бұрын
I have studied mechanic and one thing that people disdain is the torque. It can make total difference, not only about warping but also you don't brake any part inside torquing so much.
@0Myles08 жыл бұрын
Nice, objective and un-sponsored truth.
@Nordlicht058 жыл бұрын
oh good i recently buyed dba non drilled
@AhmadRaza-gb9yf7 жыл бұрын
Very informative video, please add me in Automobile Group, my WhatsApp number is +917405347520
@bigbootycaprisun4 ай бұрын
👌
@DumbSkippy7 жыл бұрын
I have a 25 year old E36 Bimmer and now run Drilled Vented Slotted front discs and Drilled Slotted rear discs both with ATE Low dust pads. Effing amazing stopping power. I'm in Perth Australia and it is very seasonal rain wise. Simply little chance of warping or cracking due to splashing hot discs. I suffer almost no fade even after a 3 am fast run across the city. For me, matched to Bilstein Shocks and up-rated roll bars, polyurethane bushes and a very worked engine I adore my car. Oh and I'm 52... not a kid.
@Matt-is9ez5 жыл бұрын
I'm 57, you're still a kid
@grantbradley50844 жыл бұрын
Matt Caulfield I’m 63 and still a kid.. technically. I am beyond middle age. So I’m old. I still think I’m a kid though!
@gang-yc4je Жыл бұрын
do you still have that bmw? it's been 5 years.
@pancho.shepherd9 жыл бұрын
PLEASE make a video about blowoff, diverter, flutter and all those kinds of Turbo Valves!
@asholeyt9 жыл бұрын
I think he already made a video about blow-offs. The turbo flutter or turbo surge i think is also mnetioned in the video.
@jeepmanxj9 жыл бұрын
-TwinTurbo250 Productions- Flutter isn't a valve. Its compressor surge. Basically if you have no blow off valve and your running all that air then slam the throttle shut its the sound of the air being forced back through the turbo. A lot of folks say its bad on the turbo, some say not so bad. Either way I would recommend a blow off valve to vent the excess pressure.
@jeepmanxj9 жыл бұрын
I'm not an engineer and I've heard both sides of the argument from engineers in the automotive industry. I chose the bov direction. You can choose the path you like.
@Mile-long-list9 жыл бұрын
He has no practical knowledge....its all from books. I bet he has never left hus house. Ask him what kind of car he drives and if he is an automotive engineer who has a job in the field or if he has any knowledge of cars outside of wiki pages
@jeepmanxj9 жыл бұрын
Mark Nope are you talking to me? I'm pretty sure he has decent practical knowledge as he builds race cars in his free time.
@stealthspoon18 жыл бұрын
where I used to live in Hawaii, I aways had a problem with warped rotors on my Toyota Sienna van. when driving home I had a long downhill trip that would heat up my brakes and warp them over time. I switched my rotors to cross drilled/slotted and never had that problem again. the cross drilled really does help heat reduction. it's not for just show or visual effect.
@Squat50008 жыл бұрын
My personal favorite is vented/ slotted. On my heavy haul truck, it makes a huge difference over hilly braking conditions, upwards of a 200* reduction in temperature depending on overall duration and loading. Dropping from 650-700 down to about 500 taking some of my local hills. The slots aid in off road conditions... I have noticed a significant reduction in gouging since swapping out.
@fernandobriseno8164 Жыл бұрын
I was wondering about this. Thanks.
@Tropicsca9 жыл бұрын
i've been researching brakes for months trying to figure out what actually works and if you actually get the performance you pay for. This video helps so much! Once again, you're the only person that makes videos that are completely blunt and direct so we can all understand in laymans terms. *I am going to choose the slotted rotors simply because i change my brake pads yearly anyways, so i'm not concerned with premature pad wear. But i DO want more brake bite. Thanks!
@ZepG8 жыл бұрын
Thanks for the video, after watching this the first time I was in a mild fender bender in my SVT Focus in the rain. I had been driving for awhile without using my brakes when all of a sudden traffic stopped and I mashed the pedal to the floor, my car braked very slowly with no skidding or anti-lock and tapped the rear bumper of a Prius. After the accident I tested my brakes in the rain and realized that the first strong application was slow to stop but the next two got better and my anti-locks kicked in. My feeling was that the layer of water between the discs and pads hindered my initial braking effort. I remembered your video and avoided buying the drilled and slotted rotors and instead ordered EBC slotted rotors knowing that the pads might wear out faster but the extra biting edge and hopefully some water evacuation would be an improvement, thanks for steering me away from the drilled weaker rotors and keep up on the good informative videos!
@colinhare69636 жыл бұрын
After watching videos for a while, I find your teaching method superb: You have the board you read off of which sums up what you're saying, but then elaborate off of that much more vocally, which is super useful for getting the gist and more.
@rhkips8 жыл бұрын
I ran drilled rotors on my daily driver ages ago, and they started to develop fractures around the holes after a couple years, despite my being a fairly conservative driver. I think it's just the nature of the beast!
@TheTwerkAttack3 жыл бұрын
Your issue may stem from the fact you didn't change your rotors for 2+ years 💀
@chrisbradley96072 жыл бұрын
@Transitive Wisdom Yeah, his rotors are cracking on the street because they are cheap aftermarket stuff. OEM Porsche, BMW, etc. drilled rotors don't crack unless they are tracked HARD. If your car didn't come with drilled rotors, don't use them.
@flute1362 жыл бұрын
@@chrisbradley9607 what if i buy nice powerstop drilled and slotted rotors and my car came with plain rotors?
@chrisbradley96072 жыл бұрын
@@flute136 Sorry, I don't have any experience with Powerstop drilled rotors to say if they are OEM quality or not. BMW and Porsche OEM rotors are often by Zimmermann. If your car came with plain rotors I'd stay with plain, you are losing swept area with drilled or slotted.
@flute1362 жыл бұрын
@@chrisbradley9607 well theyre suppose to be an upgrade kit
@johanssonb8 жыл бұрын
Wow! I had no idea that drilled rotors are not only not the best option but they are actually worse than the other options in high performance applications. I'm learning a truckload of new things with your channel, thank you! Subscription well earned!
@neonskyofficla7 жыл бұрын
It's pretty cool how I needed brake advice and immediately searched "engineering explained brake rotors" and this video popped up with the exact unbiased science behind it that I was looking for. Thanks!
@Guitarfollower229 жыл бұрын
Each time I watch one of his videos, the more I wonder how his brain still fits in his skull. This guy is amazingly knowledgable and an excellent teacher. Keep up the good work boss!
@connivingkhajiit4 жыл бұрын
years of aggressive engineering schooling will do that to a man
@Flabbycakes9 жыл бұрын
My experience with drilled and slotted rotors is totally opposite of this video. I have two 2008 Chevy Impalas and with the stock vented and solid rotors, the brakes would heat up very fast under heavy braking, even normal driving going down hills or slowing from highway speeds. They would fade and eventually start to shake as they warped, but once they were cool they would stop shaking. I switch both cars to drilled and slotted rotors and all of those symptoms are 100% gone. The cars stop in shorter distances and I can brake MUCH more aggressively than with stock ones. I have yet to experience shaking or brake fade, even stopping the from 120mph to 0 mph. My brother has been running the same rotors and pads as mine on his 2003 Pontiac Grand Prix for 3 years and has had no issues with longevity, stress cracking or abnormal wearing.
@shadowsun336 жыл бұрын
Jayson Williams I installed drilled as slotted on my Lexus IS250 combined with Hawk ceramic pads and I could push the car real hard and breaking was 1000x better than with stock rotors and pads.
@tomsfruitstand68215 жыл бұрын
That’s one of the things I changed on my 08 Impala. It stops a lot Better now that I put EBC slotted rotors on it.
@JonahZX105 жыл бұрын
Anyone got a link for some good ones for my 2014 Chevy malibu
@thor2945 жыл бұрын
did you bother to replace your garbage oem brakes or you just threw one new brakes and thought it was good? I guarantee if you put a good street pad (hawk HPS 5.0) with some blank rotors, it would brake better than your current setup
@clutchthepearls30623 жыл бұрын
You switched your pads too. That fade on the stock brakes and subsequent not fading with the aftermarket brakes is because you got better pads. Did you also flush your brake fluid? Because old fluid with particulates and water in it will boil well before fresh fluid would. Brake fade is simply your braking system unable to deal with the heat you are creating. Your rotors can play a role in reducing fade, but only if you go from solid to vented or upsize your rotors. I doubt you did either of those.
@papayaman1239 жыл бұрын
Thanks man, I braked for this video.
@anotherrandomtexan256 жыл бұрын
PapayaMan oh give me a brake...
@angeldiaz19546 жыл бұрын
Don't brake the chain
@afrity6 жыл бұрын
Brake time! (munches kit-kat)
@edwardnguyen16516 жыл бұрын
did I make it or brake it in time?
@Barrenchats6 жыл бұрын
Stop!!! these comments are killing me. :D
@alexalvarez24958 жыл бұрын
You stated that drilled rotors are not being used in F1 racing. True, but there is almost (perhaps not at all) no steel in them. Street cars are mostly steel, so there is no comparison between those two materials, considering heat resistance (thus, warping), heat transference capabilities and mechanical specs. There should be no comparison between apples and pears. Just my humble opinion, with all due respect.
@liquidalloy7 жыл бұрын
After watching this video I decided to buy cross drilled slotted rotors for my 2010 Pilot :D
@wagonkit7 жыл бұрын
I've had my cross-drilled AND slotted rotors on my car for 5 plus years and auto crossed with it, and they are holding up fine. No stress cracks. They do get hot fast but I attribute that to the fact that I don't have air ducts to help with cooling.
@DoomFinger5118 жыл бұрын
Can you do one on the advantages and disadvantages of different brake pads (ie ceramic) and also of different brake types (disc, rotor and air)?
@NeSiC1876 жыл бұрын
Straight forward, educational, and most especially, thank you for not wasting my life with useless information or extended product promotion while explaining to me exactly what I wanted to know! There should be more quality people on KZfaq like you. My hat is off to you and your videos!
@DieRuhe7 жыл бұрын
Well, this guy just totally changed my Amazon shopping cart. Thanks guy! Now I have like, $50 more in my wallet and the mechanic won't think I'm a douche for putting slotted drilled rotors on my Ford Focus!
@zxtenn8 жыл бұрын
When I bought my 2009 Accent SE, I installed drilled and slotted rotors and after 7 years and 50,000 miles I just replaced again, pads still probably had another 20,000 left but I just rather replace now than have the caliper piston at the end of its travel and for 91.00 pads on ebay included thought it was the right time. Old rotors didn't seem to have any stress cracks around the holes but some lines starting to appear.Probably saved 100.00 compared to a garageRemember also that most rotors are zinc coated so less prone to rust
@firstlookpro72826 жыл бұрын
Loved you in Napoleon dynamite!
@nickdudem9 жыл бұрын
Drilled without slots will also groove your pad, lead to reduced swept area and premature pad wear. Some companies just dimple their rotors to prevent cracking, but this is pretty much for show as well. Cheers Mr. EE!
@PreferablyHardcore6 жыл бұрын
“Well because it looks awesome” quoted every single car guy right there 😂
@15Joseph8 жыл бұрын
I've bought StopTech drilled rotors as an OEM replacement before and didn't have an issue with them at all. (And this is when i was 17 and thought I was a gt3 driver)... You will likely never make the rotor fail during daily use.
@SamMBPBSB9 жыл бұрын
Great video explaining the difference between the rotors! Nice to see a video explaining that although a tech might look as if it's "high performance" it might actually be worse than OEM. Great video!
@Drewdownkali Жыл бұрын
Someone needs to make an educational video to tell people that brake rotors don't warp. I think you are the man to do it
@runswmily8 жыл бұрын
You save people so much time, you should be given the Nobel prize for automotive information delivery!!
@SGTRacing8 жыл бұрын
All my drilled/slotted rotors that ive used have always far exceeded my stock brakes. Daily driven aswell and no cracks or issues. And yes they did see track use every weekend. Stopping was improved, fade was non existent in street use anymore and the initial brake bite was much more noticable.
@jimmystuck89694 жыл бұрын
You’re explanations are amazing. You provide detail and make it so people who don’t know anything feel like they can do everything. Your examples are really relatable and helpful as well. Keep up the good work
@AWDfreak9 жыл бұрын
THANK YOU for clarifying to the world that drilled rotors are simply cosmetic and that modern technology renders drilled rotors useless in the majority of applications. There are still many people out there that believe drilled rotors are the way to go, when for most applications involving hard use, it is not optimal.
@lizardspawnofdeath3 жыл бұрын
I had cross drilled rotors for ten years without issues. Heat differential only becomes relevant in hard track racing. No street driven criss drilled rotor will ever get hot enough for it to be an issue. For street applications they are a huge improvement with zero chance of failure
@B1ackTheRipper9 жыл бұрын
Anddddd i just bought drilled and slotted rotors for my car. Oh well. Not like the car won't stop right lol
9 жыл бұрын
Jimmy Neutron keep them drilled and slotted dude! I actually have just a little experience with overheated brakes that were smoking. stock-solid rotors, having 1,200lbs loading in a ford f150 and going down the steepest seattle hill will over heat the brakes, then ya gotta kick that e-brake at the bottom to slow down cause your main brake is toast and smoking hot. [front brakes are disc, rear brakes are drum but terrible at braking] stock-solid rotors, another experience is when I had 5 construction workers (including me and I weigh 200lbs) in my 93 mercury cougar ford 5.0. I was cruising 60 in a 35 because we were taking a 30 minute lunch. The sign lied about restaurants at the next right and we found nothing after 10 minutes speed driving. So zooming back to the main street, we found a gas station only half mile beyond the stupid sign, my brakes were smoking all the way back until we started working again. Still full brake functional, unlike my f150 that loses brake power and resides on e-brake.
@jamaisvu26649 жыл бұрын
Tyee Cambrón you keep telling this story but don't realize it was your crappy brake pads. Rub some ebc brake pads and high temp brake fluid...also learn how to drive downhill. Semi trucks will overheat their brakes if they stay on them all the way down a hill...
@UserName-kf8lb9 жыл бұрын
+Jamais Vu (Symbolic) semi trucks don't use their brakes until they're going quite slow anyway. they're SUPER expensive to replace
@jamaisvu26649 жыл бұрын
My dad Drives trucks and they use them at all speeds. They just don't stay on it
@bustex18 жыл бұрын
+Jamais Vu (Symbolic) I totally agree with you, my dad is a truck driver also.
@dionplant91978 жыл бұрын
I've been riding motorcycles since the early 1970's. the 'new' disc brakes that were introduced were blank plates. In dry conditions they were way better than the older drum brakes (they had some serious fade issues), but in the wet you would get a film of water between the pad and the disc, plus the material issues you mentioned, and when pressed harder to try and slow down, the water would be suddenly be evicted and the front wheel would lock up, 90% of the time causing a crash. The first drilled rotors were amazing, they squeezed the water out the way. The compromise of less surface area was amazing. It would be great for you to do a video about the current motorcycle disc technology including drilled wave rotors (esp for Motocross), car technology in this area is way behind the motorcycles, bikes' designs are way more advanced, owing to the increased power outputs, and unpredictability of brakes than on a car.
@bamwa Жыл бұрын
yes drilled wave rotors are prominent in mountain bike applications to keep rotational weight down. they never do solid or grooved.
@Brian-Burke9 жыл бұрын
I like how you use different colors on the whiteboard. It really helps understand the points you're making.
@quillmaurer65634 жыл бұрын
Something I always think is a good thing to look to for knowing what's best functionally is to consider what's used in heavy-duty applications that don't care about looks. Racing yes, but also things like trucks and trains - a lot of passenger trains use disc brakes. Typically very wide rotors - deeply vented - but no cross-drilling or slots, I don't think I've ever seen those features on a train. Same with aircraft, though larger aircraft usually use a totally different design of brake. A critical thing to keep in mind with any of these things is that there are a series of factors that must be compromised on, the winning arrangement depends on which are most important. Mainly: Performance, cost, weight, and longetivty. Racers care about performance and weight, with little regard for longevity or cost. OEMs care mainly about cost and longevity, though performance and weight are considerations. The trains I mentioned and heavy trucks care about performance and longevity, with basically zero regard to weight and some to cost.
@reactor47 жыл бұрын
Love your videos. Crossdrilled rotors are often used for qualifying where a team will be replacing the rotors before the actual race.
@ErwinSchrodinger649 жыл бұрын
I've had my Brembo Gran Turismo, 4-piston cross drilled rotors for over 7 years on my car. Not one crack yet, and I haven't had to replace my rotors.
@OneManArmy4Life9 жыл бұрын
Trust what he's saying. Race cars know best. They had huge problems using drilled rotors in racing when they 1st came out; they were cracking and blowing apart after heavy racing use. Now they just use slotted and solid rotors in racing; with venting of course.
@GERntleMAN8 жыл бұрын
+Mark Brooks Thank you for bringing in knowledge and uninebriation. It's quite unbelievable what some individuals dare to write in the comments containing their accumulation of pure and professional knowledge of...nothing.
@ZepG8 жыл бұрын
+1czelaya 7 years? Maybe you don't drive often or hard, my rotors are shot in 4 years minimum.
@afrobryan3 жыл бұрын
I almost purchased drilled and slotted Akebonos and you just saved me a bunch of money. Thank you
@WhiteCharisma9 жыл бұрын
THANK YOU! Seriously, so many so called "car" people I know keep trying to tell me that going Drilled, Slotted, or BOTH is the "best" for a car when in reality it's not. I've been convinced that vented has been the best for real every-day purposes because it's not like you are going through immense heat changes every day. You need the surface area to stop efficiently and to maintain adequate pad wear or else you will end up with either pads that are worn funny or rotors that don't maintain an even surface that will start making tons of noise over time. Hard to tell this to ricers when I work on their cars... it's their money I suppose!
@davebenedict79868 жыл бұрын
Good explanation and comparison. I would add that drilled rotors reduce rotational weight. Slotted rotors probably do also, but maybe not as much. I'm told a drilled rotor with chamfered holes does better as resisting cracking. Probably better on brake pad wear also.
@No_Track_Limits7 жыл бұрын
"Because it looks awesome and well, it does look awesome!"
@atsernov9 жыл бұрын
May be worth pointing out that the straight vanes of standard vented rotors still act as an air pump. So if you are going to put in a venting system, the more you can focus it toward the center of the disk, the better. The curved vanes make a more efficient pump, so they move more air, and cool faster. The down side is that they are directional and more expensive.
@The_R-n-I_Guy4 жыл бұрын
I drive a 96 Buick Roadmaster. It's very heavy. I put drilled and slotted rotors on the front. Since then I've noticed that I can stop a lot faster. They might not be the best for racing, and might wear the pads faster, but for my heavy car and lead foot, I love them
@doodskie9998 жыл бұрын
my civic has slotted vented drilled pads and painted red. plus ceramic pads. i beat ferraris and adds 50 hp each
@TheKingOfHalo6 жыл бұрын
Does it have v tak?
@chuckschillingvideos5 жыл бұрын
Just wait till you install a cold air intake. You'll have trouble keeping that wicked Civic on the ground.
@peanuts21058 жыл бұрын
AP Racing or Akebono are the high-end manufacturers and maybe Brembo. Cant go wrong with that lot if you have deep pockets. If not the dep pockets, EBC Brakes are an excellent substitute.
@Drunken_Hamster6 жыл бұрын
And Wilwood? Looking for a system for my Ram 1500. I want 15" rotors that are 1.5" wide with 8 piston calipers all around. Only problem is that Brembo makes ZERO kits, let alone THAT kit for my truck. And last I checked, Brembo was the only one to even OFFER 8-piston calipers.
@Rrapscallion6 жыл бұрын
Wilwood are fine too.
@samfarabee29637 жыл бұрын
Thank you so much for your stuff ... couple months ago I should have died in a car accident (provided I was following at the "recommended distance" on the highway), I just ended up ruining my brakes and rotors ... along with my front bumper, passenger headlight assembly, and I think the water pump. Been driving around with a wobble anytime I hit my brakes above 45mph. Just now getting around to changing them. This video definitely was more helpful than any review I could have read.
@dreflow63123 жыл бұрын
I run drilled and slotted on 98 expedition. started pulling a 6x12 open trailer with a riding lawn mower occasionally and immediately noticed that the truck didn't stop well with the extra weight. Purchased the drilled and slotted rotors and it's a world of difference. by the way if anyone is wondering about how I drive, I am a 23 year veteran truck driver with no accidents . All I'm saying is when I know what works for me, it's kind of hard for me to take advice from anyone who says otherwise.
@fmmrz59 жыл бұрын
Drilled rotors are commonly used in drifting because the brakes are hardly used so they don't see the drawbacks from other forms of racing but they reduce weight
@EngineeringExplained9 жыл бұрын
Fred Mccue As mentioned in my Formula Drift video. :)
@red_8877 жыл бұрын
How much weight is really saved? Can that make a difference? I don't think so.
@vsGoliath966 жыл бұрын
Thanks for the informative video! I'm in the middle of ripping out the front manual drum breaks on a '65 Mustang and was trying to figure out if it was worth investing in drilled and slotted disk rotors. Looks like I'll be spending a little more, but I kinda like the car so I suppose it's worth it.
@ggmtv13948 жыл бұрын
Other things being equal, the only thing that matters in brakes is surface area. If you drill out metal, you reduce your surface area. This guy is honest and knows what he is talking about. Drilled discs are for people who don't think and don't understand engineering.
@MayhemCanuck8 жыл бұрын
Stock OEM rotors with Upgraded pads is all you will ever need for the occasional track day and street use, I could see Slotted used in dirt or mud applications. Good explanation.
@anothersiguy9 жыл бұрын
IIRC high end "drilled" rotors are actually cast with the holes in them making them stronger compared to normal rotors that have holes drilled through them. And while they have less braking surface area and less thermal mass they do have more cooling surface area making them dissipate heat faster, correct me if I'm wrong.
Jad Makarem i just made a super long comment about experiences i had
@oranjoos9 жыл бұрын
Tyee Cambrón just read it, thanks man
@tbpom10039 жыл бұрын
AnotherSiGuy if you mean cast for cast irons, all other normal rotors is cast irons as well. From your words, less braking surface => less braking performance and less cooling surface. Less thermal mass => heat builds up faster. Meaning they have less heat capacity, and if you give them same stopping power, their temperature is higher. I purchased Stoptech drilled rotors when I started track driving, and I cracked both front side in 30min of first session. Drilled rotors are OK for street though, they are not for racing as EE said.
@anothersiguy9 жыл бұрын
tbpom1003 My logic was that the inside of the holes would provide cooling surface area even though they do not provide braking surface area. Otherwise yes they would heat up faster and they won't brake as hard. Out of curiosity did you get the cryo-treated Stoptechs or the normal ones?
@smueller122448 жыл бұрын
Anywhere in this video does he mention that drilled rotors decrease unsprung weight? It bothers me when he says "there's no reason". There's always a reason when you build a race car or street car. Often, cost and application. This is the second video I've watched where incorrect conclusions or assumptions are made without asking all the questions about the application. The Ford GT, which is a purpose built race car for the street used drilled rotors (among many other supercars). I'm sure material removal, heat dissapation, unsprung weight all came into play and were measured. They didn't just drill into them "for some reason". They test everything. "Because they look cool", you call yourself engineering explained...that statement is a design statement or marketing and subjective.
@winibaldcroux83396 жыл бұрын
Well, "because it looks cool" is not that strange. Very often looks are much more important than engineering. I know a guy that works in the aero department at Audi. He says the design guys always come first. If the aerodynamics don't "look cool" they're not going on the car, no matter how good they work. Ford isn't going to drill brake rotors to "remove material". If they needed to remove material, they'd just make them thinner. Unless of course, it looks cool and sells cars...
@thefuzzypickle82776 жыл бұрын
Yeah thats why racing teams have gotten away from drilled even the new c7's are vented two piece rotors
@robinc91266 жыл бұрын
He's talking full blown race car applications don't run with drilled rotors because there's not enough of a benefit. He also mentioned that street cars/supercars use drilled rotors as part of aesthetics and that companies will make them strong enough for their main purpose, which is to stop a daily driven vehicle under normal driving conditions or a supercar that will be driven hard every once in a while, at best, unlike an actual race car that's driven hard for atleast 30-40 minutes to as many as 24 hours of hard driving.
@CrazyPetez9 ай бұрын
I believe you are 100% correct on all points. Imagine my dismay when my 2007 Corvette ZO6 had drilled and slotted front rotors. I guess GM didn’t get the memo, and wanted to impress potential customers.
@robertbleicher54526 жыл бұрын
You are awesome, my friend... These videos are some of the most accurate and trustworthy information available, without any b.s. at all. I learn something new every time I see one. Keep up the good work, brother.
@pooler69698 жыл бұрын
have you ever watched a race or worked on a pit crew I have and drag cars and nascar use drilled and sloted rotters
@EngineeringExplained8 жыл бұрын
+mk ninin drag cars only need to use the brakes once, so drilled is fine because it's a way of removing weight. Also done in drifting where there isn't much braking. Nascar as well has minimal braking. There's enough air resistance that letting off is generally more than enough for speed adjustments.
@elesjuan8 жыл бұрын
I went to a Supertrofeo race back in 2013 and while walking through the pit garages during the race, one of the pit guys asked if I wanted a souvenir then handed me a carbon ceramic brake disk off one of the race cars. I don't know if they're 'drilled' but they do have holes in the braking surface just like a drilled rotor.. What's the story with these? They're glowing bright orange at the end of a straight. Do they just replace them so often it doesn't matter?
@outlawstar988 жыл бұрын
Carbon ceramic brakes are a different ball game when it comes to brake systems. Made from a different process, can hold higher heat, and last much longer. Hence their price tag.
@Faby-ei4de8 жыл бұрын
how about formula one or motogp, they have disk brakes called 1200 holes made in carbo-ceramic compound, why are they using them if they might fail?
@kabob218 жыл бұрын
+Faby0699 As mentioned above, CCB have much higher heat capacity and can handle deep heat cycling better than cast iron. They can also tolerate cracks better without compromising function or structural integrity.
@406_chevelle89 жыл бұрын
This cleared up a lot of controversy, thanks
@tbpom10039 жыл бұрын
TheCowGoesMoo o yes it does
@tbpom10039 жыл бұрын
***** It does happen regardless of types of brake rotors, expecially if the weather is cold, and you go through deep water. You only need to give some heat on your brake system, and water will evaporate in seconds.
@406_chevelle89 жыл бұрын
***** correct, because no one drives with gt3 brakes in the rain on the highway. My regular rotors have done perfectly fine and has never done what you have experienced.
@HuntingTarg8 жыл бұрын
In defense: Drilled rotors should have less problems handling rain and mud, since the holes give fluid on the rotor or pad somewhere to go without all running or caking up on the pad. Thanks for this video! It simply explains things that should be easy to understand but get lost in all the debate and rumor.
@CtRacerX8 жыл бұрын
Not to mention that the method for drilling the rotor is the leading cause for premature failure... either way, slotted or drilled or drilled and slotted provide better braking for a car than rotor blanks, and I've done hours of testing to prove that...
@Celtic-Acid7 жыл бұрын
nice vid, at the beginning i thought he was going to say and promote the slotted/drilled brake pads are the best etc. but he didn't and he knows what he talking about.
@Pakman3329 жыл бұрын
Wow I always just assumed drilled was the best, just because everyone uses them on their high end cars. I guess I know why the P1 has those big plain vented rotors now.
@weed469 жыл бұрын
Pakman332 Maclaren P1 is one of the very few supercars cars that doesn't use drilled rotors
@Pakman3329 жыл бұрын
Jonny Oliveira yeah I know, that's what I said. They are just vented.
@red_8877 жыл бұрын
They are looking for a performance characteristic which considers brake pads and rotor material. Be careful on assuming one way or another.
@xsenceo89x9 жыл бұрын
I thought the drilled rotors were popular to save weight. Kind of like a lightened flywheel. Itll take less force to spin something that weighs less.
@EngineeringExplained9 жыл бұрын
xsenceo89x How much weight?
@tubesurfer239 жыл бұрын
Engineering Explained That un-sprung, rotational weight yo
@kieranmacleod32249 жыл бұрын
Engineering Explained A couple of grams I'd guess 😂
@MrTheHillfolk9 жыл бұрын
Sometimes losing that mass can negatively affect the amount of heat the rotor can absorb too. Now ya have less metal, it gets hot faster with the same input. It's all tradeoffs
@two_number_nines9 жыл бұрын
xsenceo89x or just making them smaller is option. also when smaller the diameter will be less so the top part of the disc will waste less kinetic energy because the top part of the disc is with higher speed than the car
@SketchbookGuitar4 жыл бұрын
Thanks I now have a drilled and slotted drum brakes for my fronts... and a brembo plastic brake cover glued to it.
@dubbleA1002 жыл бұрын
I'm getting a big brake setup for Time attack, and you were the only one to actually say what the +/- are of each option 🙏🏿 Also u saved me money 😉
@jasonmcnamara20797 жыл бұрын
drum brakes all round for me please
@johndotcom96486 жыл бұрын
Drum brakes suck. They're far less efficient for stopping than disc brakes and usually more of a pain to change out. Drum brakes are for slow cars.
@doggystyledave6 жыл бұрын
HAHAHAHAH!!!!
@chrissingletary22875 жыл бұрын
slotted and drilled drums would be awesome. Wouldn't have all that brake dust collect inside the drum. lol
@deohasslehoff9565 жыл бұрын
Lmfaooo best comment on this section😂😂😂😂👍
@user-jt6nw6wm5q5 жыл бұрын
If fading wasn't a thing, drum brakes would provide more stopping power in dry conditions
@JustSomeGuy239 жыл бұрын
Mono block vs two piece calipers
@JustSomeGuy239 жыл бұрын
Lol I know monoblocks, but he should do a video on it
@DKFIXIT9 жыл бұрын
+Euge Lymbers Dont you mean floating and fixed?
@JustSomeGuy239 жыл бұрын
+Daniel Kerkotchian same thing, I've heard both I like the name monoblock better though
@bartvanriel67679 жыл бұрын
+Euge Lymbers what's the difference between them?
@JustSomeGuy239 жыл бұрын
+Bart Van Riel two piece sliding calipers are your standard everyday caliper that most cars have, they usually have one or two Pistons on one side, mono block fixed calipers a solid one piece with 4-6 Pistons with a 50/50 split have Pistons on both sides these brakes are much better because they are solid so no sliding parts which means less flex and normally have more Pistons pushing the pads, like AMGs Ferraris and Porsches have monoblock fixed calipers
@sidewayznation62397 жыл бұрын
yo bro I'm a fresh men in corona high I have auto and I saw your video on Monday night and on Tuesday morning In auto my auto shop teacher showed us drilled rotars I was the only one who knew why they where drilled, thank you for giving me some knowledge
@EngineeringExplained7 жыл бұрын
+sidewayz nation happy to hear it, thanks for watching!
@victorvenegas53437 жыл бұрын
Do you happen to know the difference between non abs rotors and abs rotors? i have a 240sx SE model with abs and having issues finding the correct info when looking for rotors.
@MrHeHim8 жыл бұрын
Just want to add that both the vented examples that were drawn act as air pumps, one relies on just centrifugal forces while the other uses a bend to assist and to possibly also increase surface area inside the vents.
@cyyeung48799 жыл бұрын
Break pad please!!
@EngineeringExplained9 жыл бұрын
CY YEUNG Soon enough!
@juanpablovelasquez38749 жыл бұрын
Engineering Explained thank you!
@monticella5 жыл бұрын
I'll preface by stating i'm a Chief Engineer. You remind me of a lot of junior engineers just out of school. By that I mean you begin your sojourn in life believing you have a quick (albeit wrong) answer for everything. If you think AMG attaches drilled rotors to their products because it looks cool, I suggest you re-evaluate your "opinion". Engineers are essentially scientists and as such Engineers present facts to reinforce their hypothesis. RR C/E P/E
@monticella5 жыл бұрын
@Terrance Armentrout On second thought......GFYourself!
@Shmalentine5 жыл бұрын
Every plain surface rotor I had on my cars very quickly warped - usually before the first pad change. The drilled/slotted rotors have never warped on me - even after a couple of pad changes (didn't have a chance to check the performance beyond that as I got a new car which came stock with plain rotors).
@MatthewStevenson847 жыл бұрын
I did put drilled and slotted rotors on the front of the 01 Ford Escape I owned years ago. I will say they stopped far faster in the rain. I only use ceramic pads now too.
@fukkinkana8 жыл бұрын
I always go dimpled.
@davidjames6668 жыл бұрын
If you suspect your brake rotors are very hot from current aggressive driving, or some sudden stops, do not sit with the brake pad on the rotors. Rather, apply light pressure, and let the car roll a little. Otherwise brake pad material will adhere to the rotor causing a pulsation in the pedal.
@ZzzRoofus8 жыл бұрын
the pulsation is from the rotor warping. if you got the rotors hot enough to melt the pads onto them, you need to replace both because overheating rotors hardens the material and warps it, causing a pulsation and reduced braking performance...same with the pad.
@davidjames6668 жыл бұрын
Adam S correct. I am saying not to leave the pads sitting on hot rotors. Although, rotors can be cheap, it is best to have the oem rotors machined at a machine shop. This removes the material causing the pulse. Many of the aftermarket rotors are not as good as the oem.
@Leo9ine8 жыл бұрын
+Adam S Another brake myth just like drilled rotors. Rotors never actually warp, pad material just deposits unevenly. Same effect but the cure isn't better cooling like people think it is. StopTech has a whitepaper about it.
@Afroninja528 жыл бұрын
+Leo. definitely not true, rotors most definitely warp. I've chucked up thousands on a lathe. The rotor runout however does not cause a brake pulsation because the whole caliper slides back and forth with the rotor.
@Leo9ine8 жыл бұрын
+Afroninja52 .... Read it again dude... The warp effect is uneven pad material deposits on the rotor. The rotor itself doesn't actually warp. This is coming from one of the largest brake manufacturers.
@drewtramp15779 жыл бұрын
Sweet OTR plug. I'm a fan. nice exlaination. you probably then could talk about different compounds, types of metals but then it would take a hour and nobody would watch.
@JesusandAssyria8 жыл бұрын
I have researched this topic when I was looking at purchasing new rotors and came to exactly the same conclusion which led me to buying non-slotted or cross drilled rotors becasue i didnt want cracking and i didnt want to have to change my pads more frequently.
@KnowledgeSharingTech7 жыл бұрын
So AMG and Ferrari sacrifice brake performance for "cool looks"?!! I don't think so.
@Bru9466 жыл бұрын
Knowledge Sharing amg definitely lmao Ferrari maybe.
@jamescarter83116 жыл бұрын
Agree, if Ferrari stopped putting drilled rotors on their cars, everyone else would follow. So, there must be a performance benefit.
@thefuzzypickle82776 жыл бұрын
James Carter not if they know they car isnt doing some serious track time, just compare they're production cars to actual track cars
@unprofessionalmechanic84665 жыл бұрын
No, buyers of AMG and Frerrari sacrifice a lot of money for "cool looks" and than stand in traffic next to priuses :)
@tomsfruitstand68215 жыл бұрын
The Camaro ZL1 1LE has vented brakes and no drilling with only small slots. Its a track oriented car and probably near the top of the best cars in terms braking performance.
@superhall2297 жыл бұрын
He looks like Jim Bob from the Waltons
@MrTredd2228 жыл бұрын
dude, I love your vids and love that you are not crazy bias on your "experiments"...thanks for breaking things down quick and easy to all us simple people that know just enough to have a beginner conversation...lol keep it up!!!
@wyvern45888 жыл бұрын
Vented+slotted in my opinion, especially if you are on a budget. The reduced weight and airflow is so minuscule in drilled you couldn't tell, however the risk for the discs cracking is a real concern.
@davidbillyard66298 жыл бұрын
Why not do some actual tests on different disc designs to show any benefits etc?
@boy6389 жыл бұрын
does the downsides of drilled brake discs applies to drilled carbon brake disc like those in Porsches etc?
@witold5439 жыл бұрын
boy638 main downside of drilled discs was tamperature difference on their surface, carbon disc may get less heat but its still quite hot so those diferences will still exist, but its not a problem because they shouldnt get to critical point in street car because of street tires performance limits and all electronical assists
@jayestofseize43249 жыл бұрын
Jakub Witak its also a structural issue too, putting holes in any structure weakens its overall strength, add heat and it does so even more. there is another option as well that he didn't cover and that is sintered brakes, but those can really pricey.
@torogami29 жыл бұрын
boy638 The heat issue is reduced, but the stress cracking risk is increased.
@gt4lex9 жыл бұрын
boy638 They now tend to put plain ventilated carbon-ceramic discs on supercars. The material can take in more heat, but I think it would be a bit more prone to breaking under mechanical stress, while steel compounds can bend instead of cracking instantly when overstressed (although I managed to crack 2 drilled steel rotors in a single downhill run). Also, group N discs are plain ventilated discs.
@burnerjack019 жыл бұрын
GT-Alex What were you driving when you cracked those rotors?
@MrCbell576 жыл бұрын
Love your videos. Brake rotors with holes do not create a fast temperature change. They cool off just about as fast as ones without the holes. I've seen temp tests measured on real street testing. But you are correct about surface being reduced with the many holes. I believe most all rotors are vented these days. And that is about the only thing that really matters. Temps do change higher and lower which is dependent more on racing and type of track. Not street use. For street use these do nothing to enhance the performance..or change temperature to benefits. Only the looks of them is the change. It is why you don't see spec temps listed for slotted or drilled rotors. The temp changes are really insignificant until you get to really racing around a track.
@millibarman Жыл бұрын
EE didn’t refer to a fast temperature change across the whole rotor. He specifically said holes result in rapid temperature ‘differential’ between areas of the rotor made of steel and adjacent areas made of well, air / nothing. Notably, the specific heat capacity of steel is 490 J/kg°C v. air at 1005 J/kg°C. That’s a significant differential that could lead to cracking even if only micro-cracks that only NDI can detect. Still, not good.
@Petriefied0246 Жыл бұрын
I looked up your video because I was looking to fit crossdrilled discs on my car. The reason was that the wet performance on the standard ones is terrible to the point that it's hard to stop the car! I live in the west of Scotland, which is a notoriously damp part of the world. I wasn't aware of the cracking issue, so I'll keep that in mind when I speak to the brake fitter.
@davidrudolph19678 жыл бұрын
I purchased cross drilled/ slotted rotors along with a ceramic or "Red series" pads. My Stage 1 2010 Passat stops so hard it's actually dangerous. My question is in regard to the effect this type of setup has on the factory abs which my brakes ( being able to easily lock up all 4 corners now) can seemingly render useless. Could you do a video about the abs system and brake system upgrades possibly? Thanks for the info and great brake rotor video.
@clutchthepearls30628 жыл бұрын
If you're engaging ABS too easily now, get stickier tires. That's all you can do to remedy it.
@kabob218 жыл бұрын
I'd just pull the ABS fuse when you go racing. That is if the ABS system is not routed through and/or works in conjunction with another system.
@clutchthepearls30628 жыл бұрын
Pulling the ABS fuse won't stop your brakes from locking up too early. They'll lock up just the same. The only difference is they'll stay locked up instead of the ABS pulsing the brakes for you. The problem is his brakes now overcome the traction limit of his tires. Only solution is to get tires with more traction.
@rickyjangatang18 жыл бұрын
y
@kabob218 жыл бұрын
Wait, what? No they don't stay locked, that's not how a hydraulic system works. Once you release the brake pedal, the brakes stop clamping, as well. ABS intervenes via software. You take away that software via pulling the fuse and the ABS is disabled and it's up to the driver figuring out threshold braking to keep the car's brakes from locking up.
@DarkstarDarth6 жыл бұрын
My grandma uses slotted drilled rotors on her wheelchairs and every time she stops her wig, false teeth and depends underwear fly off.
@mrvang807724 күн бұрын
I bought the slot and vented over the slot and drill as it just made more sense in keeping the brake pad clean. The drill is just unidealisttic as hot air will just get onto the pad, negating its effectiveness in stopping power. More surface equals better bite, kind of like on a solid vented rotor. I do notice a big improvement in the stopping power when I tap on the brake versus mashing the brake pedal hard just to get it to slow down in hot weather the stock rotor just couldn't do the job as well as expected. Sometimes, when in an emergency brake on the highway, I felt like I had to swerve out of the lane just to avoid hitting the car in front because it is just not slowing down quickly enough. With this new upgrade, I rarely had to put force down on the brake pedal to get it to slow down. I just gently tap tap the pedal and my heavy suv slows down dramatically with very little effort. I have not slam on the brake hard to see how effective it does in an emergency brake when someone cuts me off on the highway or a hazard in the front. As far as the wear goes...only time will tell after I put a couple hundreds on it. To see if the trade off is worth it by going to a slotted performance rotor over the stock.
@SternLX9 жыл бұрын
As a Parts Specialist, Stoptech slotted/vented rotors is all I run & recommend for cars that are going to be ran in light racing events like Auto-Cross. All the teams in Pirelli World Challenge use them also. I've seen other event goers that used drilled/vented only to have cracks appear. I agree here. They may look cool but drilled offers no advantage with today's performance pads.
@SternLX9 жыл бұрын
***** Stoptech Slotted rotors with PFC Brake Pads is a very good street/performance combo. I run that setup on my 1990 Mustang GT with upgraded Booster and master cylinder. You can find PFC branded brake pads at both O'Reillys and Autozone if you want to source them locally. Stoptech Rotors you can find at just about all the online performance E-Tailers, like Summit and Late Model Resto, etc., etc.
@SternLX9 жыл бұрын
+thebayareapimp Slotted rotors? No. Drilled I've seen cracking long ago. not recently though. they're OK for street duty
@SternLX9 жыл бұрын
+thebayareapimp Slotted rotors? No. Drilled I've seen cracking long ago. not recently though. they're OK for street duty
@FishFind30006 жыл бұрын
But brake rotors with holes have less mass, less rotating mass!
@Rrapscallion6 жыл бұрын
Yes. But not by much, and in any case, mass helps to keep them cooler.
@Irishluckily8 жыл бұрын
Drilled er, found out she slotted, now im leaking fluid :( . Glad I vented about this
@cookedzombies34728 жыл бұрын
+Anthony Rs dank memes kiddo
@yohkodevilhunter82928 жыл бұрын
Penicilin, bro...
@angelonicassio71313 жыл бұрын
I gave a 1997 crown Vic a second life and love driving it and I’m a bit of a lead-foot. But, as I had to completely rebuild the brakes I went with drilled and slotted rotors. I do not race this car, just a fun commuter. These more expensive and yes “cool looking” rotos lasted less than 6-months and are now VIBRATING like crazy. Under normal use they can’t slow down a big car and last... I have to replace them with solid or slotted.
@jasoncook53078 жыл бұрын
pretty good description of rotors, slotted rotors are made to cut a fresh surface to the pads and keep them as flat as possible always giving a full pad surface for the most friction possible. the draw back is after the pads are done so are the rotors and they also have some vibrations from the slots scraping the pads at slower speeds. pretty sure formula racers use carbon fiber rotors that are able to handle much higher temps and reduce weight.