[Bob In Ct]

PCV valves are an anti-polution device, not a crankcase negative pressure machine. You will not build up pressure in a crankcase that does not have a PCV valve attached to it. Who started this rumor anyway? Engines ran for decades without PCVs with no problems. Go to your local racetrack and see how many engines have a PCV valve attached, I know the answer already.

If you want, run with a breather on both valve covers. Having the PCV valve won't hurt anything, but don't think it's adding HP.

Bob