289 FIA valve covers and positive crankcase vent

[seatra]

Originally Posted by Tommy

In general a PCV system serves three purposes. It burns vapors that would otherwise escape into the air. It can reduce crankcase pressure to lessen oil leaks at seals and enhance engine performance slightly. And it can reduce contaminates inside the crankcase allowing oil to remain cleaner longer.

The Cobra I once owned was built for street and track use with no PCV and a catch can plumbed to the closed valve covers. I changed the oil and emptied the small amount in the catch can before each track event. Other than negligible damage that may have been done to the environment, I saw no disadvantage to that system. Had it been a car that saw 15,000 miles per year, my answer may have been different.

Tommy, Appreciate the feedback. My plan is to build a car for street and track use too. If I go with the Webers then PCV won’t/can't be on mine either. Don’t mind the more frequent oil changes unless it’s my RAM pickup.