Breather filter on valve cover/head
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I believe Honda intent is to push air into the valve cover in order to force the oily air out the factory pcv box/valve due to the side in which the factory slash cut is done. The system relies upon the engine vacuum at idle pulling on the pcv valve and then at higher rpms full throttle (no vacuum) to use the velocity of the incoming air on the slash cut tube in the intake pipe to force the breathing. So basically at idle using manifold vacuum and at wide open when there is little manifold vauum using intake velocity.
Honda wasn't really designing around 12:1 compression na motors going to 9k+ or cars running 30 lbs of boost. In those cases the crankcase builds up too much pressure that this system no longer works and that is why on those apps a crankcase breather system either veting to atmosphere or being mechanically ventilated by other means.
Honda wasn't really designing around 12:1 compression na motors going to 9k+ or cars running 30 lbs of boost. In those cases the crankcase builds up too much pressure that this system no longer works and that is why on those apps a crankcase breather system either veting to atmosphere or being mechanically ventilated by other means.
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honda did it pretty well KJ, but like on my H22 and F20 it just doesn't do a good enough job, i guess thats why i have a problem with the stock system
with my B20A3 though i never had a problem
with my B20A3 though i never had a problem
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I rigged up a vaccum gauge once with a rubber gasket and never got vaccum from the hose nipple on the intake tube no matter how much throttle given. I have never checked it for pressure. I know even at idle, there is a fair amount of pressure at the valve cover, which is what throws me.
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ohhh i seee okie dokie didnt know that
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I never said the Honda system works worth a damn, that is just all I could come up with looking at their diagrams, lol. I build breather tanks for all the cars I build, NA and turbo.
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01' Integra.. Slowness
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hell now i'm even more confused 0_o
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