So I have been wondering, what is the best way to vent the crank case on a street strip car? I have a solid cammed 493 street/strip engine. Right now I am running a breather on one side and a pcv on the other. Are there better ways to do it? Dual breathers? Crank case evac using the headers? Vacume pump?
Thanks alot
Another perspective. If you are using a standard ring pack - not low tension - and parts are machined correctly there shouldn't be a lot of blow by on a street strip engine. An evac system or vacuum pump isn't really needed and wouldn't help much with a typical engine. On a race engine with low tension rings it could help a lot.
The benefit of the PCV valve + breather is constant changing of the air. The PCV sucks some out and the breather lets some in under light load. This helps remove moisture and other bad stuff. Under heavy load, blowby can still exit the breather. Unless you are having a particular problem with your setup I'd just run it. That's what I'm using on a 496 without problem.
Two breathers would work OK also but you don't get the benefit of circulating fresh air through the crankcase.
