Quote Originally Posted by DennyW
Sorry 1JohnnyO, not trying to argue, but I have primed many with just a speedo wrench. You should get oil out very quickly, not several minutes. You will know right away if your going to have pressure, cause it will almost stop you when oil fills that pump, and you go against the restriction of all the clearances.

Oil pumps will always be under debate. Nothing wrong with a HighVolume oil pump, providing you do not over size the oil feed holes, and you don't go like a big block oil pump for a small block.

High volume simply means the supply is more than you need to draw from.
Denny,most of them time I will agree with what you say but not on the hi-volume oil pump.
If you use a high volume oil pump on a stock 5- qt. pan you will suck the pan dry if the engine is run at hi rpm's for an extended amount of time.
I would use a stock pump with a hi-pressure spring instead.