Originally Posted by
Russ Jerome
The heavy black coating on top of the pistons apears to
be oil from the PVC system, oil and combustion equal
detonation, lead to broken pistons/rings.
Consider installing an exhaust check valve in the downpipe
while the car is down, plumb your VC to this so all the tiny
droplets of oil go out the tailpipe and not into the combustion
chamber. Ive built systems using generic
exhaust check valves from AIR systems on Ford and
Chevys, so well I've had to tweek them from pulling
raw oil right off the pan :o
Another benefit to a crankase evac to the exhaust is it help
seal the rings even under boost, less gas in the crank area
equals more HP and a better running car.