Re: What's the major benefits of an oil catch can (corradog60mike)
The benefits come from removing the boost-bypass to the charger:
- All intake air is fresh and cool, not recirculated thru the charger and TB twice. (bypass valve is open at part throttle, only fully closed at WOT)
- The valve-cover breather spits nasty oil-vapors--said to lower the octane of the fuel. (this is what the catch tank is for, it supposedly collects about a pint every oil change--gloopy mayonaise-looking gunk)
- If you haven't already re-reouted your ISV, it vents boost thru the bypass.
- If you let the bypass valve vent to the air, it makes an awesome blow-off noise. http://****************.com/smile/emthup.gif
I'm actually thinking twice about putting mine in.
When I removed the charger bypass, I didn't mount the can right away, but ran a length of hose off the breather down behind the subframe instead. At idle or sitting in traffic, you can really smell that funky junk, and I doubt it would be any better with a vented can right in the engine bay--probably worse.
I'll probably end up mounting it, trying it with the vent on, and if it reeks, just running a hose off the top of the can back down where I had it originally.
---Dave