Oil Pressure???, What is the max? Options

[ranta18]

The book says oil pressure at 750 rpm for the 1st Gen Turbo is suppose to be 11 psi. Thats nice, but what is the WOT peak oil pressure? I'm not saying there is a limit or its bad if its over a certain amount, but what is the peak oil pressure the 4G63T motor usually makes? I ask because Garner is running 20 something at idle (but he has the balance shafts removed so that could be why). But when he gets on it, it goes to 100 psi right away and maxes out the gauge so it could be more. I want to make sure something isn't messed up and there isn't an oil passage clogged and making it run higher oil pressure. This would explain why the external oil cooler lines popped off and split open in the past.

WOT @ 6-7K rpm oil pressure anyone?

[akamiami]

The problem is that he's got a brand new oil pump and no balance shafts. This will naturally raise his oil pressure. Is it too high? Probably. I'd put a straight fitting on his valve cover and a vent on the block like nate described (minus the vacuum pump) and see if he gets any excess oil spray issues that way. Seems to have fixed the problem for me. As it was, everytime I hit full boost, I'd get some spray around the front case seals.

To confirm the oil pressure gauge readings, I get similar readings from my autometer oil pressure gauge on the evo. At normal 3K rpm driving in 5th, my pressure would seem to be off the chart. But the car is perfectly stock so I'm not going to tear into it just jet