Originally Posted by Alvyn
what grade of oil are you using? as this can have an affect also!
mine with 10/60 Millers from cold 75psi dropping to 60psi when warm(at full throttle) 45psi on tick over!

thats about 20 psi higher than mine from cold and 20 psi over at idle when hot ...
I dont know if it matters, but I have a external oilcooler mounted and i'm using a mobil 1 oil, (5w50) ??????