Oil Pressure
Large Impressive Member
Joined: Jul 2003
Posts: 65,811
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From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
Smokey Yunick (my engine god) said as a rule of thumb that 10 psi per 1000 rpm was enough for any engine with a properly set-up oiling system. Excessive oil pressure robs HP. 20 would be fine at idle.
Race Director
Joined: May 2000
Posts: 12,712
Likes: 2,264
Bearing loads increase with the sqaure of revs, so at idle the bearings have little load and the 5 psi is technically okay, but most engines will generate at least 20 psi at idle.
Smokey's advice is for a racing engine. For a street engine that will occasionally see 6500, the base 40-45 psi spring is okay, and the lower your oil pressure the less parasitic loss.
Duke
Smokey's advice is for a racing engine. For a street engine that will occasionally see 6500, the base 40-45 psi spring is okay, and the lower your oil pressure the less parasitic loss.
Duke
. No problems yet!
