Oil pump Question

[Technick]

If anything a high volume pump is a band-aid for improper clearances in the engine. If the engine is set up right, clearances on the crank, rods, pistons, rings, ect ect. then a STOCK volume pump works just fine. As long as you have 10 psi for every 1,000 rpm you will be fine. I have used a Stock volume cast iron (not aluminum) TRW, Melling, Perfect Circle ect. oil pump on 750 H.P. small block Ford that spin over 8,000 rpm and they work just fine if the clearances are set up right, the oil pan is right (use a Canton Pan) the pick-up is 1/2" to 5/8" off of the floor of the pan and the pick-up is 5/8" i.d. The reason for this is that the high volume pump eats up a good 15 H.P at 6,000 rpm and up compared to a stock volume pump. Dyno proven! Just pre-lube a engine with a high volume pump with a electric drill and then do the same with a "stock" pump. You would be amazed at the diference in torque required to spin the "high" volume pump.