Factory manual says you need a minimum of 1 psi per 100 RPM:

35 psi would be OK at 3500 RPM.

Finn

John Slade wrote:

I've noticed lower oil pressures lately. Between 30 and 40 at 3500 rpm or so when hot. 

I need to double check the calibration, but was wondering what people consider normal.

John Slade