So I built my motor about 8k ago, using sti crankshaft, eagle rods, manley pistons. and king bearings. new subaru oil pump
Engine is running strong and clean no issues there.
I just installed an oil pressure gauge and i have a few questions.
so today its 85 degrees out when i let for work this morning and on engine start my gauge is at 90 psi. by the time i get to work about 10 minutes at idle im around 17 ish. but lets say i go and do some highway driving for extended period of time or go and do a few pulls or just driving back roads is where i think i may have a problem, after those scenarios my oil pressure at idle is like 10-12 psi. If i bump the rpm to like 1k i shoot up to like high 20s almost 30.
is this normal? or do i have a issue?
the oil im running right now is lucas oil 5w-40.