Oil Catch Can/spew Tank

[T-Rex]

Hi Guys,

Pretty new to the GTR scene, i have a 1994 R32 GTR That has 2x 2860-7 turbo's running 22psi. It doesn't have a catch can but needs one as i looked in the intake and there was a puddle of oil! So what do people run in GTR's? Something that looks stock(ish) is preffered. My mate has 3 in his GTR, yes 3! And i certainly dont want that!

Thanks,

Shaun

[BezerkR32]

most guys re-locate the battery and sit it down behind the D/S headlight.

Hi Guys,

Pretty new to the GTR scene, i have a 1994 R32 GTR That has 2x 2860-7 turbo's running 22psi. It doesn't have a catch can but needs one as i looked in the intake and there was a puddle of oil! So what do people run in GTR's? Something that looks stock(ish) is preffered. My mate has 3 in his GTR, yes 3! And i certainly dont want that!

Thanks,

Shaun

[T-Rex]

yeah i dont want to do that if i can avoid it! I have seen ones that sit at the back of the cylinder head where the standard oil breather hose runs. From hi octane racing i believe i have seen them. On my wrx i had a small one about 25mm thick that fit between the battery and the headlight.

[Moodles2]

Probably these:

I run one on my GTR, it's not a catch can but rather an oil/air separator. Separates the oil and sends it down the rocker cover through to the sump.

[DCIEVE]

I had one of those adove, oil turns to a fuel smelling mess rather quickly.

[Cjmartz2k]

Putting the liquid that separates out of your blow by back into your sump is retarded. It will contaminate your oil, and all for what gain? Not having to add a couple extra drops of oil next time you check it? Dumb.

[daisu]

Put an external vent on the sump. Any blowby gases will now vent directly through that as opposed to travelling up the oil galleries and out the PCV on the head (picking up oil as it goes), also helps the oil drainage from the head because now the gases aren't rushing past in the opposite direction.

[Beer Baron]

best one is one that fits between standard battery and headlight and use 22mm pipe to it. leave the bride from left to right cover in place. block the other outlet on the passenger side, then on the remaining drivers side outlet send that to the can. have a large vent on the can and put a filter on it as your engine breathes out as well as in! you can fit a 3l can in that space which is plenty. NOTE: this wont work if you have a big arse battery. switch back to a small stock size battery, not only will you now have more space, but you save some weight too.

[Public Enemy]

I had the catch can mounted between the battery and the headlight on the old setup. It's pretty neat and tidy.

On the new setup had a custom built can mounted were the ABS used to be. Saves having big ugly hoses running down the engine bay too.

[__PhaseShiftDown]

best one is one that fits between standard battery and headlight and use 22mm pipe to it. leave the bride from left to right cover in place. block the other outlet on the passenger side, then on the remaining drivers side outlet send that to the can. have a large vent on the can and put a filter on it as your engine breathes out as well as in! you can fit a 3l can in that space which is plenty. NOTE: this wont work if you have a big arse battery. switch back to a small stock size battery, not only will you now have more space, but you save some weight too.

I have one of those, but I haven't got around to mounting it because I wasn't 100% how to mount it correctly. Since we are on the topic, is this the correct way to do it for a "vent to atomosphere" setup? Also, what are other benefits or cons, if any for running a catch can apart from reducing the amount of oil going into the intake?

Edited June 1, 2009 by __PhaseShiftDown

[T-Rex]

Yes i'd say that looks correct. The one on my WRX vented to Atmo AND had one go back to the air intake and i never had an issue. If i cant find one, i will get one custom made up to suit.

I must say, this GTR is a much more exciting car than the WRX. Im glad i moved on to the GTR team

[__PhaseShiftDown]

Is there any disadvantage for venting to the atomosphere? Apart from the fact that if there are a lot of oil, then it won't return back to the sump?

Also, wouldn't doing the above basically introduce a vacuum leak into the system??

Edited June 1, 2009 by __PhaseShiftDown

[Adriano]

Its illegal

[GT-RZ]

Is there any disadvantage for venting to the atomosphere? Apart from the fact that if there are a lot of oil, then it won't return back to the sump?

Also, wouldn't doing the above basically introduce a vacuum leak into the system??

No leak if you block off all the old connections. stock setup the blow-by goes back in to the intake and is combusted not back in to the sump.

Edited June 1, 2009 by GT-RZ

[Beer Baron]

I have one of those, but I haven't got around to mounting it because I wasn't 100% how to mount it correctly. Since we are on the topic, is this the correct way to do it for a "vent to atomosphere" setup? Also, what are other benefits or cons, if any for running a catch can apart from reducing the amount of oil going into the intake?

yea mate that is spot on. Yes that set-up is illegal for road use as it vens to atmosphere but it's the best performance wise as none of the crap is making it back into your intake. if you want to keep it legal the end with the filter can be plumbed back to the right of that picture where the original set-up fed into the intake.

[Adriano]

For road use the pcv would also have to be hooked back up

[Mr GTR-32]

Could someone be able to please give some factual clarification as per the post by Moodles earlier in the thread, is using the oil/air separator a bad idea, i dont quite understand sorry doesnt it separate the oil so to drain it back to the sump.? If that is being produced from the engine does it change in form somehow to warrant it contaminated once it is separated and draining back down to the sump.

I run this item and was told it was ok, but if somehow i have been miss guided i would like to know so that i will have to change the set up for the better option as stated by the Baron earlier.

Cheers,

Dave.

[Cjmartz2k]

You recirc it back into the intake so it'll get burnt up for emissions compliance stuff, just like stock does, or you just vent it to atmosphere and it doesn't gum up your intercooler piping. DO NOT DUMP THAT BACK INTO YOUR SUMP.

Please, somebody try to argue with me and say putting what comes out of your blow by catch can back into your oil sump is a good idea. I need some good entertainment.

[Moodles2]

Nismo have their own oil air seperator (sits on the passenger side near the ABS unit), the picture I linked above is the Autech design, and Mine's Triple Flow Cam Cover Baffles which sit inside the rocker cover and do the exact same thing (seperating the oil from the air and sending it back into the engine). So your argument is that Nismo, Autech and Mines don't know what they're doing? Obviously oil/air seperators aren't ideal on the street where your trying to squeeze 5000km out of every oil change, but whereas on the track you should be running a fresh oil change beforehand anyway

[SimonR32]

I have one of those, but I haven't got around to mounting it because I wasn't 100% how to mount it correctly. Since we are on the topic, is this the correct way to do it for a "vent to atomosphere" setup? Also, what are other benefits or cons, if any for running a catch can apart from reducing the amount of oil going into the intake?

correct!!! here is my set up using a essential catch can from greenline.jp and i went and bought a k&n filter locally