Originally Posted by Ed Wright (Post 421486)

It would be slick if you could run a factory pump at a constant speed with n electric motor to measure how long it takes to pump a quart, or whatever. Do they rate them in gallon an hour, like a fuel pump? (I'm thinking not) Then do the same with your dry sump pump. Might be a trick to get an electric motor to run at a constant RPM with both pumps. May be easier to do it off a gasoline engine. It would be interesting to know if shortening the housing and impeller 10% would get a 10% drop in volume pumped.

During the 1980s I ran an "outlaw" sprint car on dirt, (didn't drive it, you can hire crazy people for that) with a Peterson dry sump set up. I felt like it was way more pump than I needed. Never did play with that, making enough power was never an issue. Always wondered about that pump. I'm sure it was over-kill in size to cover their tails.

Originally Posted by D. Hake 4459 (Post 421551)

Years ago I modified some Melling m55 oil pumps for small block chevy stock eliminator engines. I cut the gears down and cnc machined a plate to go in the bottom to take up the space I also did some other modifications. I did some 1/4 " and some 3/8" pumps. The 3/8" pumps were worth 9 horsepower more than a m55 in back to back dyno tests.I was planning to tap into the bypass circuit and plumb in a flow meter to monitor bypass flow. About that time Schumann started making pumps and I was raising my son so I didn't have time to pursue it. If you can monitor bypass flow you could find out how much oil pump you need. Derek

Originally Posted by buzzinhalfdozen (Post 421669)

I like the idea, since I've got 2 of these pumps I've wondered about cutting down the gears and putting a plate in the void. I believe it's a inch and a half pump section, which is how I believe they rate them (by body size) may be worth looking into. Maybe make it 1 inch?