Dustin,

You don't need the high volume oil pump. An oil pump flows a set volume of oil. There are a limited number of exits from the pressure side of the oil system. The stock pump is sized for that. The only times you need to consider a higher volume pump are when you create additional flow capacity out of the pressure side of the system. If you add an oil line for a turbo or supercharger, you'll want additional flow for it. If you have the engine built and the oil holes are expanded to flow more oil, you'll want more capacity. If you run signifigantly higher rpm's, you'll want more capacity.

The high volume pump takes more power to turn. That decreases your total power output because it's parasitic drag. It also puts more stress on the cam.
Why spend energy running a pump if you don't need to do it?


Super high volume pumps can also introduce chatter as they spin. (Basicly as the gerotor inside the pump spins, the pressure behind the lobes of it increases and puts force against the cam gear. As each one releases it's oil into the pressure side of the system, that load against the cam gear is released. Picture what your car does when it's lagging in first gear and bucking. That gets transferred to the distributor and to the valves.)


My vote is to use a new stock pump that's been disassembled and blueprinted. One of the guys on the FFR boards does it for $75. He says that he gets 1-2 teaspoons of casting sand/metal shavings out of the average new pump. Let me know if you're interested and I'll track down his contact info.