04-04-2003, 10:58 PM
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CC Member
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Join Date: Mar 2003
Location: st louis mo,
Posts: 60
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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
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