416 low oil pressure at idle

Mad Dart said

Yup, I ran 20/50 Valvoline in my Swinger. Had 410 stroker in it and I used the EMD Solid lifers from Johnson. I also had Oil thru manton push rods to keep pressurized oil on the ball and cup. My oil pressure was low like yours until I wicked it up. I had like 10-12 PSI at Idle and around 45-50 PSI driving around. Get on it and it would go 65PSI. Cold it would hit 60 PSI at Idle and after it warmed up it would go to 10-12 Psi again at Idle.

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Mine does this same thing. With the throttle blipped open the psi goes to 70+ psi. At idle it hovers around 15-20 and bouces around there with the lope of the motor. That's with 20/50 oil in it. It has MRL roller lifters , oiling mods done, HV oil pump, etc. Engine builder was not concerned with that pressure at all and he's a picky dude. As long as there is decent pressure off idle he didn't have any concerns whatsoever having 15 psi at idle. But it sounds like everyone is going to have their mixed opinions on this.