Quote:
Originally Posted by Gaz64
Too much for liking. At 180F, idling at 900, I'd be happy with 20-30psi.
10 psi per 1000 rpm is a rule I've gone by for years.
Ray, if you have 70 at hot idle, what is your max pressure?
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My photos are slightly misleading: when the car is fully warmed up BY DRIVING IT SLOWLY, the idle
oil pressure goes down to 66. At cruising It will hit 90 for a minute when it is warm, but not what I consider hot. I take it easy until it maxes out at 80. The hot
oil pressure maxes out at 78 to 80. I have the adjustable pressure relief spring set at 95 to 100. These numbers are identical whether I'm using Mobil 1 15w-50 or Mobil 1 0w-40. Up to now I've only used the 0w-40 in the winter. I'm not ready for an
oil change yet so I'm inclined to keep it in there for a while longer this time.
As an interesting aside, these numbers are almost exactly what a stock well set up 1960's/1970's era Triumph 650cc twin will run at
The Melling pump I'm using is the high performance version of their high volume pump part number 10688 with their chrome moly oil pump shaft.
I don't have to be concerned with any perceived cavitation / hydraulic ilfter issues as referenced in a post above. I have solid lifters sourced fromcomp cams and using their EDM oiling hole (in the face)
Z