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What am I missing? I see others are able to post the entire quoted text, but when I click on the ‘QUOTE’ button, it never appears automatically.
6 VOLTS/POS. GRD. NW INDIANA
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DANIEL TINDER (3/30/2022)
Ted (3/30/2022)
peeeot (3/29/2022)
I have read some comments elsewhere about that oily buildup ending up in the intake tract and on the valves with PCV. I certainly have seen it on the closed-system "dry" manifolds of modern cars, but with our wet manifolds, doesn't the fuel clean things up for the most part?
A properly installed PCV valve will not contribute to either excessive oil consumption or an oily buildup within the intake tracts and/or the valves in the older carbureted engines. If this is indeed happening, then look for anything that is causing excessive blowby or an incorrect installation or placement of the PCV valve. Oil seepage within the valve guides would be at the top of the list for items to look at if deposits on the valves becomes problematic.
I have run engines on the dyno with the PCV valve hooked up versus not and there is no power difference either way. In confirmation of this, I have dyno tested customers NHRA stock engines and they do run and race their cars with the PCV valves being operational.
That is surprising. Though a very minor percentage of the mixture, still hard to believe that blow-by gasses diluted with oil fumes could produce the same power as pure gasoline (?). The PCV valves only work when there is intake manifold vacuum available. At full throttle, manifold vacuum essentially drops to zero so no air movement thru the PCV valve at full throttle. From a performance standpoint and a clean system, there is not expected to be any difference with or without the PCV valve in place.
  Lorena, Texas (South of Waco)
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