Guys, I have a new 383 dynoed at 433 (5500rpm) and 465lbft(4500rpm) with 150 miles on it (68 camaro convert.). At start up, it has really good oil pressure 50-65psi. It never exceeds 190degrees, but at the light in drive, the oil pressure stays at around 20-25 psi. I'm a littler concerned? Should I be?

No, not at all. Oil gets thinner when it gets hot, it's normal for cold pressure to be much high that hot pressure.

20-25 hot at idle is very good. I'd expect 45-55 hot at 2500 plus rpm.

dropping to 20-25 at warm idle is perfect. +10 psi per 1000 rpm from there is golden.

No need to be concerned what so ever!.....Upon initial cold start up, my 327 is pushing 65-70 psi, when hot, it will drop down to 35-40 psi at idle and when I rev up the motor, it will shoot back up to 60-65 psi......Does your motor's oil pressure increase when you rev it up?.....If so, then there's nothing to be concerned about.....The only time to be concerned is if the oil pressure remains low at all times.

Jim, Dennis and Ron, thanks for your comments - I appreciate it. Ron - when I touch the pedal it immediately goes to +50psi at the slightest tap. Today is not a good day....I just screwed up my driver side engine mount (tore it) - Luckily nothing happend (damage). Have to put a new mount in...what a pain..

welcome to the joy of harnessing lotso power! i got the moroso solid motor mounts so i wouldn't have to worry about it again. good luck!