[tchrome]

Originally Posted by DAVID GAGNARD

What Brent said!!!!!!!!!!!

Just how much oil pressure are you losing????????
Oil pressure cold and oil pressure with your oil at 180 degrees or so are going to be two different animals.....Cold, I run about 60 psi, after about 170 degrees or more of oil temp, my idle pressure is about 35 psi, at speeds it goes to 55 psi.........oil temp does make a big difference also......

My motor is not a Cleveland, but a 331 Stroker.......with the oil cooler I lose roughly 10psi of oil pressure across the board...I have a good size cooler and 12AN lines.......

I'm basing this on the oil pressure of the motor on the dyno with only an oil filter and the pressure once installed in the car with the oil cooler.....
BTW; my cooler with the big 12AN lines and a large oil filter add almost 3 quarts to the total capacity.............

David

i start up cold at about 65 to 70 lbs. i am running 6 qts of 20x50 castrol gtx oil. after hitting 180 degrees to 190 degrees i am idling at 10lbs. and running 55 mph at 25 lbs. i just installed all new auto meter electronic gauges. previously i had stewart warner old mechanical gauges. i had been having and overheating problem when i first bought the car about a year and a half ago. so i was always looking at the gauges and i don't remember the oil pressure being that low before the cooler was added. i will install a mechanical gauge again and see what i get. i just don't think it should be that low, even with a cooler on it. i have a big block 96 chevy in a 68 elcamino that runs at 70 lbs at 190 degrees. idles at 65 lbs. and even if i was a qt low on oil, i don't think it would effect the pressure that badly. thanks for your input. it is good to know that the cooler would have effected the pressure. thanks again

tony