Should be the other way around. Crankcase pressure will have an effect on oil pressure, at least with respect to atmospheric pressure. Since one side of the oil seal is at atmospheric, it can impact the amount of oil that leaks out of the block. I would suspect it is not a noticeable affect unless crankcase pressure gets real high.
Kinda sorta. Yes, increased crankcase pressure is going to push oil out seals and gaskets. In my case it is RPM related.
But crankcase pressure is not going to affect the oil pressure we measure with our instruments just downstream from the oil pump.
I read yesterday that some semi-professional Pontiac racers are having to install vacuum pumps on their engines to keep from sucking oil into their PVC or breather systems. That's how high their crankcase pressure gets.
2012 Mustang Boss 302 #1918, Competition Orange. FGF replacement 2006 Mustang V6 Pony, Vista Blue. Factory ordered. 2019 BMW X3 (Titled to the wife, but I'm always driving it for her. So I'm claiming it) Old projects, gone but not forgotten: 1967 FB 400, original CA car. After 22 years of work, trashed by the guy who was supposed to paint it. I had to sell it. 1980 Turbo Trans Am 1970 Mustang fastback, 351C 4Bbl, auto 1988 Mustang GT, 5 speed 1983 F-150 4x4, built 302 1994 Chevy K2500 HD 4x4, 454 TBI
