09-04-2006, 05:30 PM
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Senior Club Cobra Member
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Join Date: Mar 2001
Location: Southern Connecticut,
CT
Cobra Make, Engine: SPF - 351W, 944 non-turbo
Posts: 2,105
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Not Ranked
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
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