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Old 01-10-2019, 02:45 PM
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Quote:
Originally Posted by sideoiler427 View Post
The motor also has a high lift cam 705 intake and .700 exhaust with alumium michigan heads so i would think vacume would be on the low side.
I hope the machining on the motor was do correctly
Any amount of vacuum is still a vacuum, low pressure.
The oil being thrown around by the camshaft and lifters, and the crankcase vapour is in a higher pressure area compared to any of the inlet ports for the majority of the time the engine is running.
Only time they would approach equal would be at wide open throttle.

Even wild cams produce vacuum, albeit at lower levels than stock cams.

While your intake is off, I would observe the base of the inlet guide for oil moisture towards the valve seat, and if so, replace your valve guide seals with a better product.

Gary
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