Reply to "Valve cover breathers / PCV advice"

bosswrenchMember

Quoting Mike Cook, ex-Pantera racer and Bonneville specialist, 'At 6000-up rpms, the valve covers of a 351-C are full. This leaves approximately 1 qt in a stock (5-quart) pan'. So I'd say each rocker holds about 2 quarts. Mike made a temporary-use plexiglas rocker cover ala Smokey Yunick for his drag race testing.

All this is because a stock pump delivers so much upstairs oil in the stock configuration, and the drainback ports in stock heads are small with two of the 4 being convoluted and often plugged with debris. Note that only some (or none) of this may apply to aftermarket heads and blocks with modified oiling systems.

2/28/151:35 PM

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