Worn out camshafts (drive for distributer) & distributer gears,,,,,meaning many.
Switch back to a stock volume pump,,,same engine,same block ,same distributer,,,no problems.
Like I stated before,I ran 6500 RPM & saw 40-45 PSI oil pressure tops,never blew up or sun bearings,& Mike Kirby said that pressure was fine.
Personaaly I would like more pressure,but as long as things are getting all lubricated,any extra pressure is just causing drag on your engine.
I have built a few SBC's & a few inline Chevy 250 engines,I will say I would never get the oil pressure as a SBC would.
Maybe if you modify the inlines oil pump you could get higher pressures., but w/a SBC,it is really easy to get high oil pressure.
MBHD
