oil pump help

[Ron Gusack]

433 BBC bracket/index car. I want to switch from my HV pump to a standard volume to pick up a few hp. I have a Moroso 22150 pump that I bought in '09 and never used. I called Larry Stewart but he isn't making pumps until he can find a suitable machinist. I've also thought about a Schumann with an external bypass return. I don't think I need a billet, but I'd like to hear your thoughts on which way to go?

[Adger Smith]

Ron,
You only need enough volume to overcome the required flow of your clearances.
This Melling might be a good choice for you: 10774
10774Standard volume performance upgrade for M-77.
The housing and cover are CNC machined and phosphate coated.
The lower pressure spring is included to reduce pressure if desired.
Includes intermediate shaft with steel guide.
Uses 3/4” press in screen.

[Ron Gusack]

My current pump uses the cap as the pickup and returns the bypass oil to the pan, which has always seemed like a good thing to me. That Melling doesn't look like it has the grooves in the cap and wall of the body. Is anti cavitation over rated? Somewhere around here I have detailed info on how to drill the cap to get the bypass oil straight back to the pan, but I haven't been able to find it. Is it not necessary?

[Signman]

Ron PM sent

[Mike Pearson]

Go with billet. I had a cast iron pump shear off at the base. No more passenger type pumps for me. Worth the little extra money.

[Alan Roehrich]

I switched to Clay Valley Racing pumps. The last Schumann pumps I bought did not look nearly as good as they once did, which saddens me, as they had a really nice product for a reasonable price.

[Jim Hanig]

Originally Posted by Mike Pearson

Go with billet. I had a cast iron pump shear off at the base. No more passenger type pumps for me. Worth the little extra money.

Mike what do you think caused the shaft to break? I have raced chevys for 50 + years and never had a melling, chevy pump fail. Jim Blair does low pressure pumps Pierre s.d.