[TR] How much oil pressure is too much?

[Chris Kantarjiev]

One of the famous Mark Donohue "Unfair Advantage" stories is about 
looking for extra power from a flat-12 Ferrari racing engine, maybe this 
is the Sunoco 512. One of the things they found when they were looking 
for extra horsepower was that the oil pressure was very high - I'm 
remembering 100 psi - and that turning it down got them significant 
horsepower.

It's from there, and from Carroll Smith, that I have the rule of thumb 
that 10psi/1000rpm is *plenty* of oil pressure; much more than that is 
just wasting power.