Man, that GT45 clone at 10lbs of boost would make a very nice, inexpensive street setup.

Dude, you're incredible for all of the testing and information you release to the public. I love this channel.

the only man to really be waking up with a smile on his face and going to a job he loves...

When it breaks a piston or rod from the Big Bang I want to see aftermarket rods and pistons turned up until the factory sleeve fails on a k24(87mm) and k20(86mm), I feel like this would answer a lot of questions in the Honda world

Pause at 19:40 and study the torque curves. The 62mm turbo has more torque than all the big ones from 3500 to 6000 rpm, then is about the same up to 7700. At 4500 rpm, it's making 90 lb*ft more than the biggest turbo. Mid-range torque is what wins races. If you're going for a Bonneville speed record, and peak power is all that matters, go for a big turbo.

I'm so glad you don't discriminate engines. There is value in knowledge regardless of platform. I am looking forward to the ultimate power output with stock parts modified. Having the "soft spool" has been very helpful; for me with my RWD 4g63 car on no prep racing. Thanks for the time and energy

Love this channel, he goes above and beyond for us

I have two of the gen2's for my 6.8 v10 triton. Thanks for all you do.

Sir. You are doing Gods work. I am building a K24a2 as we speak and this is exactly what I needed to know. Liked and subscribed my friend

I love the mid-frame (50trim/.63 or .48) for street daily and occasional fun time. (for my 2.5 baby Mopar) You get tons of tq early, but it is of course... a trade-off for top end charge via backpressure and untouched cylinder head. Love the content as usual!

Thank you for doing these videos, it can be hard to find good comparison testing on this sort of thing.

Best video for beginners I've ever seen!! By FAAAAAAR!! Thank you brother.

Great testing, keep up the great work

A super comparison! Thank you for doing it. I feel one thing you’ve confirmed is that the GT-45 (or any similarly sized turbo) is almost like a ‘no worries, just do it!’ size turbo for so many combos. It seems to work somewhere between excellently and ok on anything you’ve tried it on. I was really happy with mine on a 6.2 litre LS swapped Foxbody... Cheers!

Love the channel, excellent information .

You have to be the smartest guy on KZfaq your the only one that can take one test and turn it into 10 videos

This is also very useful information for automatic transmission preservation, like behind a 2j.

The stuff at about 18 minutes in to the end is exactly what I like to see. Not all of us want 800- 1000 hp. at the top. Id much rather have 1 or 200 ft.lbs of torque where I drive the car. Even if it mandated forged rods and pistons, to live.

Really awesome info. Great for all the people out there who learn visually and want comparisons. Shame you have to qualify so many statements, but it's important for people to learn, or sometimes unlearn what they have heard on the internet.

The damn China GT45 always shows respectably well. Kind of amazing.

Very nice comparison! Thanks for sharing, Dutch regards, Nico.

Great information! Can you show the affects of too big of a cam on a turbo engine? Essentially the difference between turbo cams and N/A cams on a boosted application.

Also looking forward to the fully instrumented results, I think that water to air IC if they're done right can make a big difference to knock-limited performance and straight engine mass flow if you're not knock-limited.

So much good info! The torque curves really show an interesting story about sizing the turbo. Having back pressure numbers would be interesting, too but torque is what moves the vehicle in any particular gear. This begs the question from the BBC with twin GT45s, how quickly did the torque come on compared to a single S475 or S480? The back pressure on that test, the twins, was extremely low-did that kill the mid-range torque? With almost 500 cu in, did it matter? So many questions, so little dyno time... Thanks so much Richard!

Wonderful work, been wondering what turbo to get for the street that kinda have two personalities now I know

Excellent video, tons of very valuable info, thank you very much sir! 👍

I dig that ur doing everything out there. I would b down with some more csb stuff like this since ls motors have doubled in price and r still a little complex with swap. Well more costly then complex. I'd like to learn more boost with carb. Especially E85 Configurations

Another awesome video !

Im running the g25-550.. Best turbo for the street by FAR.. Capable of high HP for its size, but has amazing response and low-end.. I am tuned on boost by gear, but I make peak boost around 4K which is awesome for the street. And with the k24, stock, it only revs to about 76-7800 anyway with power falling off around there anyway. I make 390whp and 340tq which I think is a phenomenal number for the street. And its more than enough.. I couldnt turn it up much even if I wanted to as I would just spin. Im working on my suspension and tire/rim now to make it as perfect as possible.. I am running Hondata Traction control as well. Not perfect but a nice addition to have as 1st and 2nd would be useless without it. I am also running PPG 1-2-3 and a gearX 4th with Syncrotech carbon package. Trans is holding up really well. Its INCREDIBLY loud though. And I purposely went with a softer mount with Hasports 62a but the drivetrain is still super loud. A bit annoying for a street daily as I want the car to be.. And yeah the HArdrace full bushing set likely doesnt help, but the car just feels so stable and planted. Gotta make comfort and luxury sacrifices for performance.

This makes me want to K24/turbo swap my miata

Honda is where its at. Well, also LS of course.

Richard. I noticed in this video you stated what timing you had in it. Could you start to maybe mention your timing number with the LS stuff? I think it would help some of us kind of know a ball park so we don’t scatter stuff.

Hey Richard great video as always great information fun to watch. I would love to maybe see u do a 3.6 LGX turbo twin turbo build how much boost cam it take. Maybe how much none aspirated power any bolt ons to improve power. Just a idea maybe for the future even a LFX 3.6 be cool idk keep up the great work always enjoy ur videos. Thanks Josh Gessinger

I want to take a 2010 CRV and have some all-wheel-drive turbo fun. This has been some good information on turbo choice.

This is one of the best turbo comparisons I've seen. Oh I've been a mechanic for 35 years and owned my own dyno tuning business for 16 year, So I have a turbo sitting around that was on my Supra and it made 550kw at the wheels, so i'm going to try it on my Honda K24a1 just for a laugh, will be taking the K24a2 head off my sons car if I can't find a K24A2 second hand engine, We don't have E85 at the pump anymore in N.Z. so thinking of WaterMeth setup. I want to keep the K24A1 bottom end to keep the compression down 9.6:1

Not into four cylinders... However, although the result turned out just exactly like I thought it would, I still enjoyed watching the turbo comparisons. And it is somewhat amazing just how efficient those little engines are.

Nicely done video , thanks so much

A series on the Chevy Ecotech would be interesting.

"I'm going to run it on the 500 inch Cadillac" *my ears perk up*

Also from what I have learned a bigger turbo is better on V8 because back pressure can become an issue if you’re running a single turbo to compensate . a smaller Cam can give you torque sooner in the rpm while the turbo is for up top and no back pressure issues

Great video, really appreciate the stepwise repeatable scientific approach that you take here. Regarding that biggest turbo, holding up at the top of the rev range, I believe that most likely relates to how the pressure difference across the engine (between inlet and exhaust) is developing. I'm guessing that biggest turbo still has positive DP in that high rpm range when the others are going to zero or negative. Just one man's opinion :)

I'd like to know what it can do with larger ring Gap and still stock internals on boost in your next test runs as well

I'd imagine there are situations where the softer bottom end would help traction. and running them down on the top. But torque at the shift recovery point is important.

Excellent! Excellent! review!

the supercharger compound would be awesome with the big hotside turbo

Can you do some cam testing under turbo conditions? This would be awesome!!!

The ease that you can make serious power these days is mind blowing. A K24 with that smaller turbo and 500hp would be amazing in virtually any car - wicked stuff.

I was hoping to see a boost pressure map. When did the turbo get to the commanded boost pressure? At what rpm? Your explanation was very interesting. I liked to see rpm vs hp graphed. I hope next time you can do rpm vs boost graph!

Thank you, for such an informative video!

Your awesome for getting that data man I love ya for it

Loved the video! Looking forward to the next one

Dude. You are an inspiration. Sbc,Ls,K series. You just plain know whats up

I have a 75x82 1.10 ar on my cammed ls1 it lights up at 3k with load i really like that turbo

How about an LFX gm V6 test?I'm sure the junkyards are full of them and they are becoming a popular swap because of how relatively compact they are with manifolds in the heads.Maybe a little boost and see what they are capable of doing and maybe finding some limitations

Watching your channel inspired me to buy 2 3RZ motors. I have spent a week or so trying to wrap my brain around turbos and which one I need but my head is just mush. This motor is going to be a swap in my 1987 Toyota pickup which lacks power with its 22r. Any advice on turbo size for my 2.7L 4 cylinder 3RZ. Thanks

If you are ever in San Diego and have access to a dyno we can do some sr20det stuff. It’s through a vw bug transmission though.

Great video

Turbo = good. Thanks Richard great video

amazing video

Lag disappears, with a small nitrous shot. Turbos love nitrous. It increases the volume of the exhaust gasses, as well as dropping the IAT's dramatically. Both of which is advantageous, when used on a turbocharged engine. Usually a small 50hp nitrous jet will add 50-70whp and 100wtq-150wtq. I have seen HUGE torque increases when nitrous is added to laggy turbo setups. This is because the nitrous turns a laggy setup, into a super responsive setup. Making a turbo spool 2k-3krpms earlier makes the torque output skyrocket. I had a stock shortblock sr20det gain over 300wtq after adding a 140hp shot. It also gained about 175whp. Made over 500whp and 500wtq on 93oct fuel, all on a stock shortblock with over 100k miles on her.

Please more data-IAT, I/E pressures....Thank you.

SO... back to that request i made in your other video about testing a remote mounted turbo vs off the engine. Your immediate answer was "the engine dyno is not the ideal place for response rate changes". And yet here we are 5 days later testing response and power curve changes LOL. PS: I absolutely love your videos so keep up the good work!

Gt45 for the win lol! Under 750 ish hp that $163 sure seems like the ticket, especially on small cube LS motor. It handily out spooled the VS 7875 which we know is a great turbo for 800 plus hp.

What system did you use to run the fuel/spark on this engine? Oem or other? Thanks

What were the boost pressures with the GT45 test? I heard 7-8 psi but there were 3 runs shown, thank you!

The real question is with the smaller turbo running between 7 to 10 psi will the motor with rods and pistons and headstuds would it run good numbers and not blow up with a 93 octane tune instead of me having to run e85 because its hard to come by around here the closest thing to my house is 100 octane race fuel and its like $17 to $20 a gallon on a good day

Here for all the boost

@richard Holdener curious as to why 17* timing? Were you seeing knock? And was that at peak tq or were you ramping timing as rpm increased to keep peak hp climbing? Also curious what the back pressure was with using the stock exhaust manifold. I would guess that flow is being hurt at higher rpm and that’s why curve is falling off from the Na pulls.

It’s funny that so many people think putting a bigger turbo is always the answer to making more power, when in reality upgrading the cams and intake manifold is going to give you the top end power people are looking for. And usually on less boost

Blue and green. Which turbo is which? It just says k24a- Turbo-e85. The labeling is not clear.

I'd love to see these same tests, but on a factory 2jz motor. Maybe test GE VVTI and GTE VVTI as well.

FP turbo results look like a low back pressure with a large cam - as soon as back pressure creeps in on the others it'll drop power off pretty quick - that FP probably had 1:1 emap and imap or close to and lets the big cams eat.

Please test one of those new electric turbos. I have seen some about them but it was putting out 8psi of boost for less than half the price for a turbo set up.

hi Richard, have you ever considered doing some tests on a vr6 engine from volkswagen? there is not that much information about these things out there when speaking about power, so i would love to see some tests

This is exactly why I want to go 300WHP NA before boost. Lots of the other guys were talking about oh, high compression turbo is bad. Well, this seems to be within spec.

Is a setup with ITB + turbo difficult to execute properly? I know that the Nissan RB26 uses it.

Would absolutely love to get some Kinsler ITBs for my all motor K. Currently still running the Hayward Performance manifold and it does really well but ITBs are just top shelf all motor units lol. Truthfully my ported and port matched RBC made good power in itself. We’ll see what direction my next $$ gets sent to; ITBs are certainly in my future if I stay all motor but I’m also considering dumping the current piston giving me ~13.5:1 static comp and going for around 10:1 then taking the old Sidewinder and GTX3076 off the parts shelf and making something new happen. Decisions decisions lol

Also to add to this bigger turbo makes more power at lower boost such as 10 lbs on a small turbo may be 5 lbs on a big turbo which can have better charge temps I have also seen turbos with a .63 hot 78 cold that make 5lbs fast but get lazy at more boost over a .63 70 closer to equal wheels

Would love to see a holset hx35/h1c

Can you do this testing with a 6.0l ls test?

I hope you make 1000 with this. I just don't think the stock sleeves will hold. Will be tuned in though! Id like to be proved wrong tbh and see it happen

I love boost! There’s a 67mm turbo on my hybrid. Yeah...it burns diesel and rubber.

Rich Were do you think a G25-550.72ar would sit with this set up? It would be on the down hill side of the map. My curiosity is in how much sooner it would come on(ref screen shot 19:24 "5250 transition ")? I understand that wound be counter productive for the purposes of this test.

You tryin to give that Kinzler manifold away? I'd take it off your hands lol

Bro can u do one for a k24 A8 I was wondering if it can make power with just lil bolt one?? Thank u

BIG BANG ALREADY PLEASEEEE 🤪🤪🤪🤪

Choose the biggest turbo and use boost controller to help spike the boost down low.

Please do a compound turbo on something to show benefits of usable power and see if the small charger actually chokes it out with big power or if it doesnt

K24 is a rowdy little bastard. I have a spare j35 from a 05 odyssey I'd be willing to donate to research.

Do a high comp d16 single cam big bang

@richard holdener, can you do one of these videos on a 5.3 LS?? Comparing some diff size turbos. Looking to single turbo boost a 5.3 Tahoe but want to keep it a reasonable daily to drive.

very good video

Might be a very stupid question but can you/I run salt ice water in the intercooler? How fast would it start to cause problems if any? We learned when we were young that salt water will get way colder than plain water, it's how we got ice cold beer very quickly.

If the dyno can do a 5000 rpm run i.e. 3000-8000 rpm, can you start to show v8 engines at 2000 rpm and up? Off the line power is important for heavier vehicles.

Has he done a video about ideal turbo for k24? Say I wanted 450-500hp or maybe 600hp on pump gas for street droving and Hiroshima 800-1200hp on e85 is that possible? What woukd be the best for steady power but also make the most peak? I have a 3582r and I make boost around 3500 and on pump gas and only about 10psi the tires spin in second but I feel it could use a little more in 4th and 5th. Do I just need to set up boost by gear or maybe woukd a differemt turbo be ideal? It's in a mr2 spyder

I have a question I have a 2012 Chevrolet Silverado single cab with a 4.3 V6 what size turbo can I use with it without having to Gap the Rings or do you suggest another method of increasing horsepower

you need to do this on a ls 5.3 which a lot of your readers have

I get a jealous feeling in my gut when a Honda Boi gets boosted. My Truth

Seeing how much power the K24 can make NA is about what i was looking at getting with a turbo just because i got the A4 and finding cams for that thing sucks, makes good torque tbh, around 270hp with 10 psi, should boogie like a booger

Do a twin vs single turbo video