I think the general rule of thumb of 10 psi for every 1000 RPM is not needed.
I had told Mike Kirby I used to turn my engine to 6500-7000 RPM range & only made 40 PSi of oil pressure , he said that is fine.
I would have like to see more like 50 PSI @ 7000 RPM, engine never blew up, had 12:1 compression turning 6500 RPM , switch cylinder head & put a blower on the same untouched lower end & ran to 7000-7500 RPM range & could not blow it up, this old engine is still in my Camaro, been sitting so long & want to freshen it up a bit.
MBHD
