8000 rpm in engine with a wet oil system is about tops. At that point you are heading into dry sump system $$$. Oil capacity, how fast the oil returns to the oil pick, pan baffles and how good your crank scraper is comes into play with a good wet system. There is a cohesion effect from the oil whipping around the crankshaft when it rotates at those speeds and keeps the oil suspended in motion. A good crank scraper is a must.
The Accusump has been around for as long as I can remember and I'll be 60 this year, The poor mans dry sump it was called. But it's good cheap insurance.
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