Vacuum Pump recommendations

[dusterbing the peace]

I can't say you are wrong. Again I have lower tension rings on narrow 4.5 bore Diamond pistons. File fit done at a reputable shop. The engine was dynoed and dialed in there. If there's a ring issue I'll have to talk to them

Have you done a compression or leak down test? Do you know what your cranking pressure should be to compare against? Might find a hole (or more) that is the culprit.

Another, more simple question, just trying to eliminate variables here…looks like oil high up on driver side there; could your remote filter block or connections be leaking at higher pressure?

 

[66Valiant528]

I had to move my remote filter assy.off of the motor plate to mount the vacuum pump. I had to make new 10 AN hoses. Nothing leaked on my 3400 rpm test run. Pulled 10 inches of vacuum at the pump. I'm going to look for some vacuum leaks first. Plugs are tough to get at. Thanks all for the recommendations. Need to do some roll cage work as well.