So, I'm curious about my oil pressure on a brand new 408 stroker. Quick rundown: MP/Scat crank, H-beams, Diamond forged pistons. Hughes hydraulic roller cam with "retro fit" roller lifters, (got 'em when they came out 12 years? ago sometime) ported Eddy heads, Hughes roller rockers, Victor 340 manifold, Milodon gear drive.
On the dyno running 10w40, from 3000 rpm to 6200, oil pressure with a "high volume pump" was 43psi at 3000 rpm, and 50psi @ 6200 rpm. Imo, I think that's a little low...
Today I swapped to one of those billet oil filters with the removable stainless mesh element, and gained 2 psi, still not good enough. Cold idle with 20w50 I read 50-55psi. Once warmed up at 180* engine temp, idle is 20psi. If I rev it to 1500 or more, it will not go past 50psi.
What could be happening? Is oil bleeding past the "retro fit" hydraulic roller lifters? (lifter bores not bushed)
I have to change a leaking rear main seal, so I will be installing a "blueprinted" 'high volume' precision oil pump, that I had Doug over at Precision 'shim' for even more pressure, if that'll work. I just Don't know. Trying everything to NOT tear this sucker down. lol
I will be uploading 2 videos one cold while warming up, the other hot. Stay tuned.