[rohrt]

Took the car out last night to see how the 5w-20 might change the pressure readings.

Cold start at idle was still near 80
Once at operating temp idle pressure was right at 40
Under 2k cruising would hover around 65-70.
Above 2k would be closer to 75
So there was about a 10psi change observed.

As for oil pump mod, I only used one washer, as it was supposed to take up the gap of the smaller check ball, but was a tad more. I'm surprised the spring would be that sensitive.
I do wonder if the nightmare performance 1/4" plate has more to do with it. I thought I read that factory thin plate would distort and leak under high loads.

And for gauge accuracy. I don't have any way to test it at the moment.

One last thing, my temp is only coming up to 135 on the guage. I need to look into that more. I question then if the oil is really reaching operating temp. I would think maybe once it does it may come down just a little more.