I've never had good luck doing that mod.
The engines would end up smoking more.
Any reason why you're looking at this option?
Only real reason to increase oil pressure is to increased redline on the engine, or if you're running serious amounts of power - i.e. over 400hp?
Other than that, there's no real reason to do this on a daily driven street vehicle.
The Racing Beat 85psi(?) street OPR upgrade is good enough for most applications.
It's reasonably priced too.
-Ted
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