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How much oil pressure is too much?
early 2.7L, I rebuilt the engine about 2K miles ago. Oil bypass mod with correct pistons, turbo restrictors for the cam lines.
I have the oil pressure gauge that reads 0,20,60,100,140. And I believe it to be correct, it worked well before I tore the engine down and seems to work correctly now.
When the engine is totally cold at 2K rpm I'll see 100psi. I try to keep it under that pressure reading. When warmed up at 180F-210F at readline I hit 60 or so psi. Initially I though it was high due to the oil being very cold in the winter, but I'm still seeing the high pressures at startup. The pressure levels seem right when the engine is warm.
So, is it possible to build too much pressure? I'm pretty sure it is primarily a result of the turbo cam oil line restrictors and the oil being so think when cold, but I'm not sure what the "right" pressure should be or where I need to be concerned. Can I run it all the way to 140psi (about 3000rpm when cold) or is even 100psi too much?
Pat
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