Originally Posted by Guy Hiltz
Its all a moot point anyhow,big block & small block oil pumps are not interchangeable.And as to DoubleVision's statement that a high volume oil pump takes 12 or mor hp to drive,I would have to see a back to back dyno test beforeI would believe it.
Interesting isn't it?
You can prime an engine with a battery drill with cold room temperature oil, and yet some say it takes a million horsepower to turn the pump.
I use a 3/8 electric drill that free spins 2800, and I guess at least 2000 under load (4000 engine rpm)..... and it sure isn't a 12 hp drill.
Tests by pump manufacturers on their pumps showed that high volume pumps draw almost zero additional power since the additional volume is bypassed. The tests also showed that the bypassing oil creates almost no additional oil temperature increase.