Air Oil Separator VS Catch Can Explained. Is One Better?

Рет қаралды 205,903

3 жыл бұрын

This is a very frequent question that I see asked a lot. "Should I get an AOS or will catch cans work okay?" So in this video we are breaking it down and taking a look at both an IAG AOS and a set of Radium Engineering Duel catch cans.
First off both of these systems are very beneficial to have especially for any High compression engine or turbo charged application. And you can only imagine the benefits that these systems will have when you have a turbo high compression car.
For me i have no preference for which system is better than the other however there will be clear indicators of which system you should used based off of your application, but you'll just have to watch the video to find out.
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Пікірлер: 626

@davidvuong3234 3 жыл бұрын

Crazy I've been looking at a catch can and here you come out with a video on it. Awesome content for any wrx sti owners out there looking to mod their cars. Keep up the great work man

@Smeedia 3 жыл бұрын

Thanks my man🙏🔥😁

@cycle2bhappy 3 жыл бұрын

Great vid and post as usual. Just had the install of the IAG AOS done, so nice, looks fabulous in the car and functions so well. However, I did consider the catch can approach but ultimately went the "set it and forget it" route it with the AOS. Cheers.

@mrpithon Жыл бұрын

I came from the 2004 STI series, seeing the engine bay in this car is insane. Really nice work, hope to get my '04 WRX looking this good.

@justinshute5726 7 ай бұрын

Living in a cold climate and not wanting the hassle of having to keep catch can empty and hope for not freezing I went with aos. Was planning catch cans for a long time but ultimately was convinced to go with IAG and glad I did

@jamescolquhoun9636 2 жыл бұрын

As a new Subaru owner, dude your channel is like the best thing ever. I had so many questions and you’ve answered like all of them in your vids already🤣appreciate it man, you a real one

@Smeedia 2 жыл бұрын

Eyyyy, glad the videos have helped!

@Kakeyoro Жыл бұрын

The reason why the "oil" in the catch can seems thinner is because it's not just oil, being separated. It's mixed with other vapors, including water and fuel. I would go with the Dual Catch Can system because I wouldn't want to pump anything but 100% oil back into my engine. This would prompt you to perform oil changes more frequently.

@HandMadeWrath Жыл бұрын

But doesnt the aos seperate water oil and air

@weduhpeople8504 6 ай бұрын

Yes and since catch cans are not being recirculated with filtered oil you really have to keep an eye out on the oil level in your engine. Depending on your motor’s health or piston to wall clearance if it was done to tight tolerances or loose tolerances will dictate how much blowby you have. I noticed the oil level can drop quickly where if you weren’t checking your oil level you may find your oil level on the dip stick isn’t even meeting the minimum level required. Running e85 definitely thins the oil in your engine. On oil changes you can see how watery the oil your draining is and can smell fuel mixing in your oil which lowers the viscosity of your oil.

@cumshot247 5 ай бұрын

Yup, on my GDI, I get this black, runny, foul smelling, fluid in my can. I surely wouldn't want this to recirculate onto the backs of my valves. 💀

@Vermonstered 5 ай бұрын

@@HandMadeWrathNope, I honestly don't understand the point of the AOS in this configuration over a catch can. As the only tangible difference is the AOS dumps its contents back into the oil system. Adding in the complication of running coolant lines to heat up the AOS system. The coolant will be whatever your thermostat opens up the system at or generally around 180f which isn't hot enough to vaporize oil or water but will for fuel but only if given time. Being it's immediately dumped back into the oil system and you see how little actual fluid these collect (tablespoons in thousands of miles) it makes no tangible benefit to the additional plumbing and risk of extra oil and coolant lines to possibly reuse a few tablespoons of not great oil anyway.

@spidding 4 ай бұрын

@@Vermonstered my view on this is that both catch-cans (or non-return-to-saump air-oil separators) and what are marketed as "AOS" (or return to sump air-oil separators) both have their use cases. For street/light-track applications for lazy owners - return-to-sump AOS. street/light-track applications for fastidious owners - catch can For heavy track applications with lots of blowby or if you are in a setting where you do many continuous hot laps (endurance racing etc.) - AOS. Polluting your oil mix in your sump is a lesser evil compared to running low on oil.

@tommyboy049 3 жыл бұрын

installed a catch can to my 2019 v6 challenger. kept reading, "oh you really don't need it for the v6's". Well, after 6k miles I poured out 3oz of oil

@Smeedia 3 жыл бұрын

All engines will have blow by, turbo, supercharged and high compression will have it worse but any engine will benefit from a catch can 🔥

@lowlifeangler 3 жыл бұрын

Is Challenger made by Dodge ?

@blankfaceman9694 3 жыл бұрын

@@lowlifeangler yes

@Sooobwuu 2 жыл бұрын

Just picked up my 21’ sti and your videos are godsend. Love the work, keep it up ! ✌️

@Smeedia 2 жыл бұрын

Eyyyyy congrats on the car 🔥😁

@SICMADE7 Жыл бұрын

This was the 1st vid I watched to learn about this and feel like I know a heck of a lot more now, thank you for being detailed! At the end of the day, I think I'll save up and go the AOS route

@Smeedia Жыл бұрын

Glad to hear the videos helped and an AOS is well worth it 🥳

@codyhendrickson7735 3 жыл бұрын

IAG AOS is one of my favorite things I've installed on my car. Highly recommend their AOS, great product.

@Smeedia 3 жыл бұрын

They make a killer AOS 🔥🙏

@cycle2bhappy 3 жыл бұрын

Agreed .... the IAG is highly functional and a reasonably easy install. If I would have only removed (deleted) the sound generator tube beforehand, things would have been so much easier. Cheers.

@Flatbushfonz 3 жыл бұрын

@@Smeedia what about cobb

@Smeedia 3 жыл бұрын

Cobb is good. Just a re-branded IAG with diffrent baffling

@DylanMorehouse 2 жыл бұрын

Nice. I like how the oil is put back into the system with the AOS. Convenient. Never knew the difference and now I do! Thx bro 😎

@Smeedia 2 жыл бұрын

Anytime 🔥

@scottdman 2 жыл бұрын

Interesting video and well done. Not sure I 100% agree with all of your statements/philosophy but the video is well done and I appreciated the intro to some new brands.

@user-pwfus 3 жыл бұрын

The main thing is the pvc system has to be a closed system with no air filter and the valve cover system has to be vented to allow air to escape when you have high pressure like rpms.

@subie3138 3 жыл бұрын

Nice!!! Perfect before buying!! Just My brother and I we're talking about this last week. He got the twin turbo Stinger Kia, and me My subie. AOS is the perfect fit for me 😝 Thanks for the info 👍🏽

@Smeedia 3 жыл бұрын

Definitely will help keep things healthy! Glaf the video helped 😁😁😁

@FADWC 3 жыл бұрын

I just want to say thank you for the education! I appreciate your videos my dude 🙏

@Smeedia 3 жыл бұрын

Anytime!!!

@mijikle 3 жыл бұрын

The idea of having an additional coolant/oil return line to rout, on top of having potential contaminated oil feed back into my oil pan is why i wont do an air/oil separator. Catch can it is. Great video.

@Smeedia 3 жыл бұрын

Loved the catch cans on this car, kept a lot of the nasty out of the motor 🔥

@zokusharuuku1091 3 жыл бұрын

Aos also is a bit harder to install which will cost more. I don’t like the idea of dirty nasty watery oil going back into the engine so I prefer catch cans but my tuner was adamant that I switch to an aos with the high boost I’m running. I declined as I honestly love changing my catch can frequently so I can easily look at what’s going through my engine.

@Smeedia 3 жыл бұрын

Catch cans work great, just need to remember to drain them and they're solid 🔥😁

@TheWestysworld 9 ай бұрын

How often do you empty it with the turbo?

@zokusharuuku1091 9 ай бұрын

@@TheWestysworld every month or so I’ll pour out about half an inch of oil out of the can

@lucienlalachance 3 жыл бұрын

been waiting for this one! Good stuff err bud

@Smeedia 3 жыл бұрын

🔥😁🔥😁🔥😁🔥

@Mike-cu6gk 15 күн бұрын

Great video. These work great (a o s) I have seen these on diesel engines catch on fire because they were not maintained meaning cleaned and filters replaced during every oil change.

@azntuanboy 3 жыл бұрын

IAG just announced couple days ago that they're releasing their V3 AOS in the fall, I'm excited can't wait great video bro!!!

@jdmking4776 3 жыл бұрын

Bruhhh. I just bought mine wtf lol

@Smeedia 3 жыл бұрын

I sae that, they will have a conversion from the V2 to the V3 avaliable also 🙏

@Qazxswer68 3 жыл бұрын

Speak of the devil 👹 I was just explaining this to my son yesterday. This will be a great visual for him. Another one🔥

@Smeedia 3 жыл бұрын

Eyyyyyy! Perfect timing 😁

@xxraverxxonxtacy 3 жыл бұрын

Had a Cusco on my sti and got mostly vapor, difference was running Motul 5W-40 Xcess which also helps with less blowby instead of regular 5W-30

@Smeedia 3 жыл бұрын

Interesting to know, but makes sense a higher viscosity could reduce the amount of blow by

@s208richard8 Жыл бұрын

Motul also make STI performance oil - 5W-40 - recommended for the S207, S208 models

@kwbalance108 2 жыл бұрын

Though I own Mazdas, I find joy watching all of your videos!

@Smeedia 2 жыл бұрын

Ryyy appreciate the support my friend 😁🔥

@kwbalance108 2 жыл бұрын

@@Smeedia Yessir!

@HavokStrifeX 3 жыл бұрын

You finally sold me on the catch can here, seeing that emptying it at oil change intervals would be fine. But hey, imagine that, 4000 miles without checking a catch can on a Subaru engine and it didn't completely overflow! Must be some pretty good engines after all! 😉

@Smeedia 3 жыл бұрын

The catch cans will definitely help 🔥🙏 and oh yes 😁

@geriatricginger Жыл бұрын

4000mi, and they barely had any in it? Must be nice. I put one on my 2.0T VW, and it fills up 300ml catch can in about 70 miles.. Yet compression and leak-down tests are in spec.. WTAF lol

@clutchboi4038 Жыл бұрын

@@geriatricginger probably just means his can isn't catching as much lol

@peterorigenes4358 2 жыл бұрын

I am installing a dual catch can in my turbo direct injected Alfa 4C. I had Mazdaspeed 3, oil catch cans were really useful that engine blew a lot of through. Like an old Porsche turbo, it you accelerated hard and closed the throttle, then nailed the throttle it was like a smoke generator. Totally normal on MS3. So was carbon build up. Some engines are prone than others. The Alfa 2.0 in the guilia has very little blow by. The 2.9 now has port and direct injection, like Fords and many new engines. Helps not only with managing combustion but also keeping valves clean.

@Smeedia 2 жыл бұрын

Duel injection is 🔥 the FRS/BRZ platforms use Toyota D4S system to prevent carbon on the valves as well 🔥

@chadm6805 2 жыл бұрын

It’s crazy watching this video after watching your current ones. The amount of progress and change in the sti and your channel is awesome.

@Smeedia 2 жыл бұрын

Def come a long way 🥳😁

@ryanarch7366 3 жыл бұрын

Great video as always! What was your reasoning for going AOS on the blubaru and dual catch cans on the BRZ and not both AOS or both catch cans? Wanted to try each out?

@Smeedia 3 жыл бұрын

Wanted to be able to compare the two as both cars are driven. Personally I have no prefrence on either option. Theyrr both good to have but catch cans will typically always be cheaper

@JohnNorris411 10 ай бұрын

Also, I throw a stainless steel scrub brush you use for doing dishes, into the catch can. It provides a lot of extra surface area for oil vapors to come in contact with, stick to and condensate on to drip down to the bottom of the can rather than making their way through the air stream up the exit tube to the air intake.

@psions555 8 ай бұрын

Could you use not very densely packed steel wool like a giant crack pipe for your engine

@BurmaJ 2 ай бұрын

@@psions555Before track days I add the steel wool and roughly an 8 ball of crack to my catch can. YMMV.

@psions555 2 ай бұрын

@@BurmaJ Try heroin instead. It will make the motor run so we'll. Be sure to add it frequently and not let it run out or the motor will run rough

@giovlone742 3 жыл бұрын

Finally a video on this topic, I was thinking of running the boomba cans but probably will go the iag aos

@Smeedia 3 жыл бұрын

Both are good options IMO, I'm starting to lean towards cans a little mkre over AOS after seeing the inside of that IAG.

@giovlone742 3 жыл бұрын

Smeedia if only install one catch can which one do you recommend will catch more oil on the FA20 motor?

@Smeedia 3 жыл бұрын

Thr passenger side off of thr PCV valve 🙏

@alexudolkin2146 Жыл бұрын

The heated AOS is good at evaporating some moisture but I suspect the return oil still brings blow by fuel & water vapor back into your oil pan. 3k oil changes are crucial

@Vermonstered 5 ай бұрын

Your coolant is only 180f, the vapor entering the can will likely be in the same range of temperature so not much benefit. The purpose of heating the AOS is to allow the water and fuel vapor to pass through because the temps are closer to their vaporization temp while oil will hopefully condense. You want the small amounts of excess water and fuel to pass back into the combustion cycle and exit the system. But for any daily driven not heavily modified car, I question why anyone would want to add an additional oil line, tap to the pan, t off a coolant line all because they're too lazy to check a catch every time they do an oil change. Or in this case it looks like he could get away with 3+ oil changes and still have few problems.

@kroviken 3 жыл бұрын

Great explanation friend! Thank you! - from Subaru driver Malaysia

@Smeedia 3 жыл бұрын

❤❤❤

@bradgreen987 3 жыл бұрын

The IAG aos is great. I used to smell oil after a hard pull, but now nothing. Love the no maintenance. Wish I could see how much blowby is collected

@Smeedia 3 жыл бұрын

Can always swap it out for a can set up if you wanted to see how much you were getting 😁

@paulmarsdensr1095 2 жыл бұрын

I would definitely get the IAG AOS.

@billychi6961 Жыл бұрын

I have a catch can with a drain port. So I teed it into the crank breather with a check valve so pressure does not blow through the drain. I basically have an AOS for cheap it works good and drains back into the crank without the can filling up. I also capped the PCV valve and the breather into turbo inlet by the throttle body. So VC breathers from the cross pipe and crank breather feed into the inlet and the outlet goes into the turbo inlet by the power steering pump. Way simpler, way more effective and used nice fluorinated silicone stretchy vacuum hose for good seal without ever becoming brittle

@Hanibul_Lecktor 3 жыл бұрын

I like the Cobb/IAG for the lazer engraving. The IAG sticker kinda discolors and comes off due to the heat. Think it's just a couple of bucks more for the rebranding. Worth it !!

@Smeedia 3 жыл бұрын

True, it does look 🔥🔥🔥

@853rudedogs2 2 жыл бұрын

the catch can look handy for monitoring blow by. would be good if air/oil separator could monitor too,

@MyNameJason 3 жыл бұрын

I was literally thinking about this last night since your catch can post on instagram lol

@Smeedia 3 жыл бұрын

Had to get some interest in it before posting 😉 lol

@ObiWanStromboli 2 жыл бұрын

Got washed away watching the differences between an AOS and catch cans and was nice to see the ol’ EJ-25 in the Bluebaru

@Smeedia 2 жыл бұрын

I low key miss the EJ 😅

@spidding 3 жыл бұрын

A few points to add. 1) not your fault, but I think there is a lot of misuse around catch can and AOS terms. The way I see it, a catch can is a type of Air Oil Separator. It's function is to...wait for it...to seperate the oily residue from the returned air. You can classify these generic Air Oil Separators into various types: a) a very simple non baffled non-returning unit. Still attempts to seperate air and oil but probably doesn't do a great job without baffling. (E.g. el-cheapo eBay units) b) a baffled non-returning type (like the radium units in your video) c) a baffled returning type (like the IAG/Cobb unit) 2. It really should be noted that blowby is not just air+oil. It also carries a filthy mixture of burnt and unburnt fuel. So, whilst the IAG AOS may do a good job of keeping water condensation out of the caught blowby fluid, the IAG unit is still dumping this polluted content back into your sump. This is more severe on E85 applications. Recommended to decrease oil change frequencies if they are not already frequent. This is the main reason why I have a bit of a preference towards non-draining air oil separators (aka catch cans). 3. the amount of blowby that you get (or that is caught in a catch can) is not only due to the condition of your engine. It's also influenced by how you drive the vehicle. Case in point, the catch can I run on my STi runs bone dry 99% of the time. However, out on track where oil temps can breach 120degC, this can thin the oil (I use 5w40) out to such a degree that you now see alot of blowby. I caught approx 300mL from 30min (2 sessions) of circuit driving in 30degC ambient temps. That triggered me to install an external oil cooler - now the catch can runs dry again even at track duty.

@janbakker9866 Жыл бұрын

What about the 100's of posts on reddit saying bad things about the aos. I have a iag aos sitting on my bench contemplating on not installing after all my research....just about to watch this video, hope it changes my mind! Love the content tho keep the solid work! 👌

@ZephyrusRomerG 3 жыл бұрын

Salute! Detailed review!! 💯

@Smeedia 3 жыл бұрын

Thank you 🙌🙏

@RicondaRacing 2 жыл бұрын

I never knew about the denaturing of the fuel. Getting an AOS today!

@Smeedia 2 жыл бұрын

Well worth it my friend! 🔥

@MisguidedAng3L 4 ай бұрын

I just installed a oil catch can on my 2019 wrx and the turbo is noticeably way quieter, it also makes me feel like my car isn't getting the power it was before. I'm not sure if i did anything wrong or if all this is normal with a catch can. Any insight would be very appreciated! Thanks! Great content as always man keep up the good work

@HugoHardinge 3 жыл бұрын

Awesome video. I’m about to put a catch can on my Crosstrek. I haven’t installed it yet

@Smeedia 3 жыл бұрын

Super easy and well worth it 😁

@HugoHardinge 3 жыл бұрын

@@Smeedia getting hoses tomorrow then gonna mount mine up

@ericmitman9675 3 жыл бұрын

Great video again, love your stuff. Any recommendations for catch cans on a 2020 STI? I really don’t see the value in AOSs as pricy as they are. Also wouldn’t find it inconvenient to empty the can every oil change.

@Smeedia 3 жыл бұрын

Radium makes some really good ones 🙏🔥

@okthen8445 3 жыл бұрын

Radium dusk catch can ftw

@stephenmargetjak6989 2 жыл бұрын

@@Smeedia part numbers?

@okthen8445 3 жыл бұрын

Great video. For me If it’s something like a daily a catch can is more than sufficient and actually to me better than a “AOS” because not only does a catch can not only desperate air and oils. It completely traps it in the can. That’s good because oil can potentially be contaminated by fuel and other stuff which isn’t beneficial to longevity. So yes a catch can actually is a “AOS” but it keeps that oil. On the down side you will lose oil but it’s marginal and not a concern. However if you have a catch can on a race car then that’s a different story. A race car gets wayyy more blow bye. And during a track session the last thing you need is to trap the oil in the catch can because then you’ll get oil starvation and that’s the last thing you need. So what an AOS does compared to a catch can is drain that oil back into the oil pan. Now the oil could be potentially contaminated but that’s a zero concern in a race car because the oil would be changed frequently anyways. So why not slap a AOS on a daily? Well longevity. A daily isn’t getting as much blow by as a track car and really doesn’t need to send the potentially contaminated oil back into the car. Most of the time people get an AOS because of the “set it and forget it” feature. And avoid the catch cans because they fear having to do more work to drain the cans. But you can find catch cans with drains ports that you can run under the car. That will allow you to drain the oil while you charge your oil if you will. Why not slap a catch can on a race car? Well you can but then it wouldn’t be a “catch can” it would instead be a breather tank. It’s like a catch can but with a much bigger body to hold more oil and vents the air atmosphere. So all that crap is never returning to the engine. But what about oil starvation. Well that’s where larger and baffled oil pans come into play. But that’s another story. In the end To me: catch’s cans for daily’s or even street cars (low end near stock power levels) AOS for track car/race car (high end power levels)

@Smeedia 3 жыл бұрын

I think it comes down to how you drive the car, some people drive their daily pretty aggresivly. I know toh my STI getting kn the freeway and backroads i dig into the car. Both systems function very well. And either one is better than nothing

@okthen8445 3 жыл бұрын

Smeedia your right. Driving habits are also a thing to consider as well. I always forget that because I kind of baby my sti lol and yea both are better than nothing. To be honest I got dual catch cans because it’s cheaper and it’s better than nothing even for my stock sti lol I figured out the rest after doing research AFTER installation lol

@alexpeguero38 3 жыл бұрын

Sum Guy have you noticed any oil in your catch cans given that your stock?

@okthen8445 3 жыл бұрын

Alex Peguero absolutely. There was a decent little puddle sitting in the manifold when I had the throttle body off well. There was also oil in the intercooler. I flushed it with acetone and when I drained it out the acetone was a gold color almost like brake fluid

@alexpeguero38 3 жыл бұрын

Sum Guy wow

@Hyunw22 3 жыл бұрын

Remember installing a IAG AOS on my sti. Absolute nightmare. Installed a catch can on my friends 86. Sooooo easy

@Smeedia 3 жыл бұрын

The 86 is so much easier to do 😅

@Vtecyo81 Жыл бұрын

I run a oil catch can already on my EVO8 MR, would I need to change to a AOS? What benefits would the AOS make over the catch can? Luv ur vlogs on JDM cars bro!!!

@TURMYTE 3 жыл бұрын

My car has neither. I’ve had the TMIC off numerous times, and luckily not a smudge of oil in the IC or throttle body. Guess I’ve been very lucky with that so far. I can’t believe the previous owner never installed one based on everything else they did when they built the motor. But I do plan on getting one of the Grimmspeed AOS if they ever become available again. Not many other options for 03..

@Smeedia 3 жыл бұрын

I would advise any, literally any other AOS

@clutchboi4038 Жыл бұрын

could be that your pcv is plugged and you're simply living with crank case pressure.

@loganramos6900 2 жыл бұрын

I kinda like the idea of catch cans since from what ive seen from other research on catch cans they catch water and other junk that isnt oil and make sure its not going back in the oil, which in turn might help keep oil cleaner? Idk about that maybe not noticeable but in theory it should. Idk thats just my thoughts

@Smeedia 2 жыл бұрын

Your spot on, I just put a set of catch cans into my BRZ today

@K03sport 11 ай бұрын

love Radium stuff...thinking of their aos as I have their bmc brace and their aos mounts to their bmc brace. this should leave room for the AEM strut bar I'm eyeing for the near future...still curious is to why Subaru didn't engineer an AOS into their engine design from the get go on the FA/FB series engines.. 🤔

@Jordan-ql6tm 2 жыл бұрын

Appreciate the well explained video. What are your thoughts (any pls chime in) of the AOS possibly returning water and unburned fuel back into the engine with the oil? I notice my Subaru buds tend to gravitate towards AOS far more often then my Chevy buds who all swear by Catch cans? I daily an STI and just fixed up my ole '98 z28 which has been mothballed for years now and being old AF I wanna keep her healthy lol.

@Smeedia 2 жыл бұрын

Personally inuse the competition series now so I'm not pushing potential dirty air back into the system. General rule of thumb I follow is of its an external cold area than a catch can is preferred due to the potential of moisture freezing in the oil return line, if its a dedicated power car/track car I'd use a catch can over an AOS. The standard AOS is fine for a normal street car though

@Jordan-ql6tm 2 жыл бұрын

Right on appreciate the response, it's a trip now against aos the camaro groups are vs my subi groups. Maybe those v8's are just more prone to dumpin water & unspent fuel back into the system than our subarus are complete polar opposite in popular choice between the two products lol. I don't care to acrew around with emissions in the CaliKremlin lol so the only legal choice would be the Crawford v2 aos for the STI daily but haven't yet since those Blackstone analysis have shown almost zero contaminates & normal material wear for a car I'm the 80k range when I'm almost at 120k .. The z28 will be the abused car again like it was as a broke youngster before she was mothballed lol. Haven't had any increase in bearing material on the STI since installing a Fluidmpr balancer show up on analysis that number is exactly the same from 75k - 119k now will be putting one on every car from now on.

@jarrodblaesing9079 2 жыл бұрын

Great video! Any recommendations for local Seattle area shops to install the iag AOS?

@Smeedia 2 жыл бұрын

The mod garage is a popular one people go to as well as drive auto sports 🙏

@retiredperson4054 7 ай бұрын

What filtering internal setup works the best? I have been looking hard and long for several days on end trying to discover which brand of catch can has what filter set-up on the inside and MOST IMPORTANTLY which filtering mechanism is the ULTIMATE at not only allowing oil and water vapor into the catch device but also the prevention of the oil and vapor to get pulled back into the intake. And to add to that, which device(s) may cause “restrictions” to the crankcase ventilation system - and what about the factory PVC devices do they get removed?

@onairamzelarom1536 2 жыл бұрын

Hey man I have a 20FA-20 lol it’s my first subie she’s all stock haven’t done nothing at all but seeing your video has me thinking the obvious better choice would be an (AOS) but seeing your set up on your BRZ running dual catch cans seems like that kind of set up is more than enough to keep the engine healthy and happy as long as it’s not being pushed too far beyond reasonable HP it’s tuned to handle and what’s the price difference between the two setups you showed on this episode ? Huge fan of the channel too man very well organized material and subie 😎🤟🏽

@Smeedia 2 жыл бұрын

Eyyyy honestly a single catch can would be more than sufficient. Radium makes some pretty affordable options. I know Crawford was working on an AOS for that engine but nkt sure in price point of it yet 🙏

@jdmking4776 3 жыл бұрын

Ooooo EG33. Love that engine.

@Smeedia 3 жыл бұрын

Yesssss 😁😁😁

@ajw828 3 жыл бұрын

Great video! I have the IAG AOS in the garage, soon to be installed :) Did you see their new AOS? I think it comes out relatively soon. Wondering what the difference is between that one and the current.

@Smeedia 3 жыл бұрын

I saw they were releasing a new one but don't know whats diffrent yet 😅

@mikekillion4731 Жыл бұрын

A little late to the party but they say it gets more of the water out and some other improvements.

@markkenward7040 Жыл бұрын

I put a Catch can with dual vacuum lines on it, one on intake and the other to drivers side turbo. Rationale for that is that at W.O.T. or other higher throttle levels, your manifold vacuum drops off, so turbo draws on it to keep vacuum on catch can. My 2013 Ecoboost D.I. 3.5 liter can go up to 700 miles on a fill. Since I live 20 miles from gas station, I never let it get near empty . I usually check it at every other gas fill up, or about 1000 miles, sometimes less. I may get 10-12 oz. of muck which I save in garage in plastic bottle and let it separate. It does NOT use any oil between changes, and only has 53K miles on it. You get 3 distinct levels after separation. Gasoline, sludge, water. It is ugly. If you have a D.I. engine, you need one of these devices or you can pay the guys who use walnut shells to blast your intake valves. Your choice. I am thinking of buying a 2013 Lincoln MKZ sedan with 16k on it from a fellow I know, but have yet to look at it 75 miles away. 2.0 liter D.I. ecoboost. You know I will have a catch can ready for it when I get home, or soon after. Great Videos!

@tarandeiniol3092 2 жыл бұрын

Thank you for explaining good video

@Smeedia 2 жыл бұрын

Anytime 🥳

@17.06.Copper Жыл бұрын

Hi Smeedia, I have 2016 Forester 2.5i FB25 block and decided to run a catch can as I had my original block after 200,000km, succumbed to an internal head gasket leak. Rather to repair it, I opted for a low KM 2017 FB25 block and had it recently installed. I'm trying to get as much longevity as possibly and thought the oil catch can would help. I have heard that it also increases crankcase pressure and acts as a restrictor to the PCV system. Have you heard of this and do you have any insight for me?

@Tea18236 Жыл бұрын

if you get a catch can rather than the aos, you can monitor the health of your engine. increased oil in your catch can may be a sign of piston ring wear

@aaronmcilwaine3537 6 ай бұрын

Which one is better for colder weather.

@3obardThawn3 Жыл бұрын

Thanks for the video...

@Smeedia Жыл бұрын

🙏🙏🙏🙏

@roninlaw9824 Жыл бұрын

Appreciate the video. Just saw it, sold on both setups for reliability. So is an air oil separator, worthless without the coolant connections?

@Smeedia Жыл бұрын

Not worthless but thr coolant connections help to keep moisture from building up by keeping the AOS the same temp as the engine

@TheShadeManGuitar 3 жыл бұрын

Gunna throw one on my 06 gxp. Seen i was blowing blue smoke on decel and start up. Pulled the valve cover to see a gummed up pcv baffle. Gunna put a catch can as precaution as I drilled out the valve cover baffle so it would not clog again

@Smeedia 3 жыл бұрын

Not a bad idea, hopefully helps to clear up the issue 🙌

@jcreno253 2 жыл бұрын

Thank you for this! The Discord is 🔥

@Smeedia 2 жыл бұрын

Anytime! 😁

@pw85___ 2 жыл бұрын

OCTurboJoe had some interesting videos and looked into it and here you are with the same info, 💪🏾

@Smeedia 2 жыл бұрын

Joe's awesome! 🙌🔥

@RaJahDathurr 2 жыл бұрын

It's also to keep your throttle and intake clean

@Bigjawnnn117 Жыл бұрын

Hey I have a question is there a difference between a single and dual catch can set up? I’d like to get one for my wrx but price is kind of important to me as of now thanks if you respond !

@gdtbsr3370 3 жыл бұрын

i just bought the v3 aos for my 2017 sti 💕

@Smeedia 3 жыл бұрын

Crawford or IAG? 😁

@gdtbsr3370 3 жыл бұрын

@@Smeedia oh iag sorry hahaha cant wait for it to arrive

@carlnewstrand9408 3 ай бұрын

Great information. But what about diesel engines. I have not heard of catch cans with diesels. They have much higher compression than gasoline engines. Thanks.

@BrooklynKidd 3 жыл бұрын

Heck yea needed to know this

@Smeedia 3 жыл бұрын

🙏😁🔥

@jasonjones2871 3 жыл бұрын

I opted to go with the ADD W1 catch can and only installed the CCV side (passenger side) as I've seen so many videos regarding duel cans that have the same results, dry PCV (driver side) can. The product is comparable to many others but at a lower cost, $170. Haven't seen too many WRX/STI's with this brand, have you heard anything about them?

@Smeedia 3 жыл бұрын

Can't say I have, but I do agree a single catch can is really all that is needed

@BuckingFeast 3 жыл бұрын

My AOS cost me about $700 after shipping and duty to Canada. Took me about 8 hrs to install but definitely worth it.

@Smeedia 3 жыл бұрын

For sure, ans the first one always takes the longest 🔥

@justinabanto8930 Жыл бұрын

Hey i know this is an old video but i just got a 2017 wrx recently and i wanted to know how did your aos handled -40 temps in canada? Im being skeptical as to getting one since im driving mine daily and its almost winter. Dont also have a garage so its always outside. Want to know if they really hold up the colder temps. Thanks!

@BuckingFeast Жыл бұрын

@@justinabanto8930 Not too sure I actually never winter drove mine, but I would assume it would work just fine, still get's hot under the engine bay.

@EthyBear 3 жыл бұрын

If there's moisture going back into the catch can then isn't it better to have that system than a AOS? I don't have either system yet but I'd personally want to get a catch can to make sure moisture isn't mixed back in the oil. I had my block reamed out to 2.7L so I probably need one of these systems more than stock builds. Awesome vid!

@Smeedia 3 жыл бұрын

I would go with a catch can, you can at least tramp the moisture without any worry of it going back through the system. And hot damn did you go with a stroker kit?

@lrblouie Жыл бұрын

Thought - since the "oil" in the catch can was "liquid-y" and possibly having more than just oil, having that go back into the system doesn't sound as good of an idea in case it contaminates the engine oil (making the catch can a better option?)?

@dannyboy3591 2 жыл бұрын

I noticed you saying you were going to dedicate a video strictly for that while going through the build process and I haven't been able to find it, or one that shows what hose/ports to plug or connect too. Can you make a video on your AOS Set up on your 2005 Impreza WRX STI? I wanted to know how to mount it to the car and the way you ran your lines. Unfortunately, my car will not have a front mount intercooler so it might be slightly different but that's okay because everything else is the same. I'll just have to tuck things really good

@christopherbroadhacker6663 3 жыл бұрын

IAG AOS install super easy. Catch can install super easy. Love my AOS from IAG super beneficial. Highly highly recommend

@Smeedia 3 жыл бұрын

100%, ive had thr IAG on my STI for a while now and always does the job 🔥

@KellyEnterprises 3 жыл бұрын

When I ran a dual inlet single catch can in my optima sx turbo in the winter time I was filling the can every 300 miles (not at all in the summer) something worth mentioning I think... it caused me some issues for sure.

@Smeedia 3 жыл бұрын

That is an interesting issue, haven't heard of it increasing that much due to temp change

@KellyEnterprises 3 жыл бұрын

@@Smeedia yeah, it's why I think I'd only use an AOS in the future because the coolant keeps it warm. Do you guys see near/below freezing temps in Washington? I'm in NY.

@Smeedia 3 жыл бұрын

Every once in a while but not too often

@consentofthegoverned5145 8 ай бұрын

The coolant connection COOLS the vapor so it will condense out the water and volatile organics, leaving cleaner, drier air to go the to the manifold.. The gases coming out of the crank case are much hotter than the coolants system. You either want the catch can or OAS out in front of the radiator for cool airflow, or cooled by the cold output of the radiator.

@thepseudomasterchef7238 3 жыл бұрын

I had the IAG comp AOS but converted to the street version after going flex fuel because I didn't want to have to change my oil every 1500 miles...But now people are telling me the street AOS can clog the EBCS lines...I insulated the AOS drain/oil return hose because we have cold winters up where I live but now I'm hearing that issue may not be the only concern

@Smeedia 3 жыл бұрын

Only issue I've seen is that in extreme cold the return line can clog but never herd of the EBCS line clogging

@thepseudomasterchef7238 3 жыл бұрын

@@Smeedia I've seen it in the forums...I'm wondering if maybe it's the result of a kink or maybe another installation issue. I checked my EBCS hoses after about 10k miles and they were clean so I'm hoping I'll be ok...It's on my Fa20 wrx

@mattm920 3 жыл бұрын

Do either of these void warranty? Also, in the winter months of Chicago is one better than the other with cold temperatures.

@Smeedia 3 жыл бұрын

Both will void it, and catch cans will be better for colder weather 🙏 an AOS return line and freeze due to potential moisture

@Jonatha8a12 3 жыл бұрын

Nice video man, just what I needed

@Smeedia 3 жыл бұрын

Glad it helped 🙏😁

@rs3daily587 Жыл бұрын

i LOVE how those catch cans have a dip stick

@Smeedia Жыл бұрын

Makes checking them easy 🔥

@tdro98 11 ай бұрын

On a ej205 Will you get more oil from crank/pcv or from the heads?

@Eric-cf8je 3 жыл бұрын

I have a 17' Forester XT (the same engine FA20DIT as the WRX for the most part). It gets slightly rough idle on warm up after a few thousand miles before an oil change. I use CRC Intake Valve & Turbo Cleaner before oil changes. This seems to fix it for a while. The intake manifold sensor seems to get pretty oily. I think an Air Oil Separator would help. Thoughts? This my first Subi & turbo gas vehicle.

@Smeedia 3 жыл бұрын

Definitely would help, wouldent be pushing nearly as much oil back into the system 🔥

@mikekillion4731 Жыл бұрын

I have the same model, did you end up getting the AOS? Any difference?

@AntonioHernandez-bp3mx 11 ай бұрын

I'm putting dual cath can on the 22 wrx would it be fine if I put em on or would there be problems I've seen someone say that the catch cans cause the blowoff valve not to work correctly

@mooremaceo 3 жыл бұрын

Thanks!👍

@Smeedia 3 жыл бұрын

🙏🙏🙏

@lowlifeangler 3 жыл бұрын

A couple of tea spoons is not bad... better then a couple of quarts! ( My Chevy due to bad timing chain cover gaskets, resulting in a new cheap timing chain from AutoZone which resulted in a newer engine)

@MR-oy4fc 2 жыл бұрын

I run the dual catch can setup from Radium in my STI. I like them better than the AOS I had that always wanted to leak coolant.

@Smeedia 2 жыл бұрын

I had one of my IAG ones do the same 🙃

@AlejandroPerez-cb9ub 18 күн бұрын

Tengo 3 preguntas. un oil catch can puede generar mas presion dentro del motor ?? importa el tamaño del occ con un motor L4, v6, v8 ?? y por ultimo es mejor 1 o 2 occ en un motor v6 ya que esos motores tiene 2 salidas de pcv una por el banco 1 y la otra en el banco 2 ??. Tengo un impala 2019 V6 motor es LFX y cuando le instale el occ me empezo a silbar y cuando le quitaba la varilla de aceite se le quitaba el sonido al final se lo quite todo por miedo que se me rompa el motor

@RepLimitless 3 жыл бұрын

So the 4-6k mile check of the catch cans is exactly why I went single can on my WRX and did passenger side only. Saved money since the driver side can seems useless from multiple videos. Do you think I made the wrong decision?

@Smeedia 3 жыл бұрын

Not at all, as long as your remembering to empty it, you make a solid choice 🔥

@hitom43 2 жыл бұрын

Can you add a catchcan between the engine and the pcv? How would it affect the engine?

@Smeedia 2 жыл бұрын

Technically speaking yes you can it would essentially just be an AOS

@griffin.e6235 3 жыл бұрын

The catch can you drained oil out of was the one mounted by the battery?

@Smeedia 3 жыл бұрын

Yessir, the drivers side one only had a minor layer of oil on the baffling while the one on the passenger side (battery) needed drained

@bruceholinight7978 3 жыл бұрын

Good video , I've tried several on WRX/STI , and Forester's , never collected much on any of them guess I drive too slow . As a matter of fact I took mine off my current 2 liter STI cause after two years dry I figured it's just taking up space but if I was planning on track day's I would put a good AOS back on !

@Smeedia 3 жыл бұрын

Glsd to hear that you've got a healthy engine 🔥😁

@raybrensike42 2 жыл бұрын

What collects in my catch can is a lot of water and just a little bit of oil and sometimes the can gets full of water in only a few hundred miles. I have to check it often in winter as I was making lots of short trips.

@Smeedia 2 жыл бұрын

Normal for cold climate and short trips. At least the cans are doing their job 💪

@MrPunch09 Жыл бұрын

Wait, if its full of water then what is happening in a AOS setup?

@wildcatz49 Жыл бұрын

@@MrPunch09 👀

@MrPunch09 Жыл бұрын

@@wildcatz49 I think no one wants to answer this question is because we already know the water is making its way back. Makes me think a catch can is more sensible. Obviously you have to schedule you maintenance to empty the can, but they do have catch cans with an overflow.

@wildcatz49 Жыл бұрын

@@MrPunch09 yea, I've been on other vids looking for answers. I'm going with a catch can. Just bought a zl1 camaro

@ronaldpenasollet4184 3 жыл бұрын

Smeedia, I have my flexfuel kit installed and all the parts suggested by you for a E85 swap, I already did a protune but I having some issues when I cold start the car, I saw your video about it and you said that is normal in cold wheaters because of the nature of E85, but I’m in Miami and right now is like 90 degrees every day, the car starts fine and it never turns off, but is does like is gonna or if you push the throttle it doesn’t respond well, I just want to know if that is still normal because of the E85 or I need to contact my tuner again. Thanks for all your help and the great content man

@Smeedia 3 жыл бұрын

Its worth sending some logs to your tuner to see what he says, ive never had issued like that with mine 🙏

@ronaldpenasollet4184 3 жыл бұрын

Smeedia I’m gonna do that, thanks for the help, I hope is nothing serious also because one the car is hot there is no issue