Quote:
Originally Posted by inopsey
interesting thread, it seems that the general consensus is to run the pcv valve as nissan intended but a mazworx engine comes with a custom valve cover that does not allow a pcv valve to be installed, there is only a male -10 an fitting. combine that with the facts in this thread that there is a restictor in the pcv valve line, begs the question how much crankcase ventilation/vacuum does the pcv valve actually provide at idle or mid throttle? and is lowering the knock threshold (by decreasing the octane) for the engine by polluting the intake manifold with oil (by running the pcv valve) of any actual benefit to the engine longevity or efficency ?
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The PCV valve should only be open at cruising where there is vacuum in the intake manifold. At cruising the octane doesn?t matter. The only time you should be concerned about that is when the PCV system is faulty and allowing the engine to pull/push a lot of oil into the intake manifold. You can still run a pcv valve, Radium makes an aftermarket -10 one.
Kingtalon has actually convinced me that a proper PCV system does belong on everything but a racecar with dry sump oiling.