Originally Posted by big_c_snow
Hello folks, I return with more information on my fresh 383 that had low idle oil pressure. Turns out, in addition to the trash ruining all the bearings and requiring the crank to be turned, the cam is also flat on two lobes. It's a Comp XE268H, and I have slightly stronger than stock valvesprings (not sure what the pressure is though, any way to find out other than a scale that I don't have?)
Plugging the oil fitler bypass and running a good filter would have saved your crank from being turned and debis going through your engine.
S-3 15/40 CENPECO oil has 1582 PPM of zinc.
There 20/50 has 2300 PPM of zinc.