[tnlprt]

crankcase pressure comes from compression getting past your rings A PVC valve lets your motor create a vacumn inside the crankcase easing the pressure on gaskets and promoting a better ring seal and yes it does create a slightly leaner mixture but show me one performance engine that is run on the ragged edge of being too lean and you'll see more than a few burnt pistons most are a little on the fat side when it comes to jetting it shouldn't be to hard to rejet after installing pcv valve