oil pumps

[Henrys Toy]

Originally Posted by qflash

I've been told to run a standard volume oil pump in my stocker. How much does a high volume oil pump or a high pressure oil pump rob from engine horsepower?
Thanks,
Ron miller

Good morning to all,
I guess it depends on the manufacture of engine, RPM, oil pan depth, and internal oil clearance's.

Respectfully,
Henry Kunz 1534 H/SA

[Signman]

What Henry said. ^^^


If you have a well built SBC the stock small block oil pump is more than enough actually a little too much. The pump was designed for worst case scenario road driving by those who would do no maintenance and abuse the engine. The 5 quart fill requirement is actually a quart or more the engine really requires.

The power robbing point in the oil pump is the bypass not being large enough. This is explained in David Vizard's book on hot rodding a small block chevy. This is also mentioed in Grumpy Jenkins book on building his small block pro stock engine. Doing what is described will help if you don't want to go with the Schuman Pump and the hours a fabrication to get the full benefit.

Mods which help reduce HP loss in the oil system are not bolt on require hours hand fabrication most will not pay for or do themselves if they have the skills.
Having 50 lbs of oil pressure at idle and 80 lbs + down track may be self assuring but all you need 20-3- at idle and 40-50 down track to be good.



Be Well!
Work hard the results are fun!

[427FE]

Been recently told for every 10 psi reduction , 6 hp.

[Rick J]

Originally Posted by 427FE

Been recently told for every 10 psi reduction , 6 hp.

I've seen about half of that.