Oil Catch Can

[RAP1D]

and oil vapours in the intake which become vapours in the combustion chambers, greatly increase the chances of detonation.

[pip_brendanAKAfrosty]

on my old NA ute I just had a lil air filter on there, I didnt understand the concept 100% but I had seen plenty of other kids runnin them so I tried it...

[turbotrana]

You have two sides to the PVC system. The PVC valve which is on the intake manifold vacum side and the rocker cover to pre throttle plate side.

The vacum side sucks on cruise/idle whilst the rocker cover side vents under load.

For performance purposes filtering the rocker cover side helps but also for keeping the engine running better under cruise, having one on the vacum side helps also.

[hanra]

You have two sides to the PVC system.

You mean Positive Crankcase Ventilation, PCV?

[ETM]

pretty sure he is a plumber haha

[turbotrana]

1.45 am with the flu makes you think like a plumber

[hanra]

Hahahahaha. Get well soon!

[ORSMXRT]

Thanks for the write up. I too have my catch can sitting in the garage for about 18months and never thought of doin something like that.

Guess what I'm doing Sunday?

[seventytwo]

Good luck and dont forget the pics

[Smitty]

I owned a skyline that I ran a catch can on and I just vented it to atmosphere, through a small filter which I'm pretty sure made it legal. The main reasons I vented to atmosphere for is 1. sometimes the catch can won't catch everything and this oil vapour mixed can cause detonation and when plumbed in before the intercooler or turbo, can sometimes accumulate in the intercooler itself, 2. (this one depends on where its plumbed in also) if or when for some, your engine lets go under boost the blowby will pretty much push a sh1tload of oil out the breather and go into the turbo\intercooler\engine and cause more drama(bend tubo blades etc). I vented mine to atmosphere to hopefully avoid some of this. It is important though when running a vent to atmosphere setup that after the catch can a filter of some type is used as when the engine is under vacuume it will be sucking a small amount of air in also and you don't want crap getting in with your cams. Keeps the cops happy too. RB engine is a bit different but the same principles are still there. If anyone wants a pic I could probably put a couple up.

If I am wrong by the way, I am happy to be corrected!

My 2c

Smitty

Edited 09/12/08 01:53 PM by Smitty