Re: Oil starvation issues SBC HELP?
 

Accusump may "cover up problem" but isn't the idea to stop crashing motors?
Pan design , oil volume and screen or solid limiter on pump can help correct the issues but Accusump is great insurance against issues of all kinds.

Re: Oil starvation issues SBC HELP?
 

Oil Pump pick-up to close to the pan bottom, or to far from the bottom?

Re: Oil starvation issues SBC HELP?
 

Carl , as a machinist for the last 35 years and in particular at a major airline ........we don't use / have any "cheap" bore gauges.:)

Re: Oil starvation issues SBC HELP?
 

I know about those. Had one on a circle track car for a while, until they made dry sumps legal.

Re: Oil starvation issues SBC HELP?
 

Are you a SS racer?
In traditional Super Stock cars I would think an accumulator is popular since you cant use dry sumps?

Re: Oil starvation issues SBC HELP?
 

If nothing else try 10550 pump or another that uses 5/8 pickup tube,it fixed a couple engines for me.
That Ultimate II is still good pan that stroke with alum rods shouldn't have any windage issues,we ran that same pan on 9,500 and 10,000 rpm engines with that long of stroke and aluminum and steel rods.
Is pan like Moroso made it?It hasn't been modified or left anything out of it ?
Not overfilled on oil?

I remember first time we used one of those pans we like to never got it on the engine and got in the car and had to pull it for some reason and we thought crap this is going to be bad, with engine sitting right side up it falls off engine,when engine is upside down that pan is virtually impossible to get off or on,so if yours goes off and on with engine upside down may have parts missing.
If remember correctly has teflon coated tray that is practically solid no holes or louvers,and it directs oil it catches into the kickout,only part of pan you can see bottom is area where pickup/pump sets and rest is hidden by windage tray.
with 30wt. and HV pump .0025-.003 clearance should'nt cause issue,those clearances and that pump you should have 60-80lbs oil pressure cold and probably 50-60lbs with 170-190 oil temp idling and when rev should go up,if drops instead it is cavitating from pick up clearance too close or far away,or 3/4 pickup or windage.

Don't assume anything is right out of the box.

Mike Taylor 3601

Re: Oil starvation issues SBC HELP?
 

Mike this pan hasn't been modified. The 10552 c pump is whats in there now with the .750 bore/ tube.
I had a HV55 with a .625 bore...............same problem
It may well BE the vac pump. I'm going to reduce vac , baffle the pump and very likely add an accumulator.
Moroso changed the Ultimate 2 apparently , because mine has a big kick out with tubes going through it ( 3 ) and a SCREEN not a baffle..........and it came this way new in 2001 or so.

Re: Oil starvation issues SBC HELP?
 

check #12 accusump and accumulator are same thing

Re: Oil starvation issues SBC HELP?
 

Did you have the pressure drop problem on the first run also, or just the second? What kind of pressure did it carry on the first run? Where is it starting to drop (RPM, gear, how far down the track, etc.) and how far does it drop? From what to what? As much detail you can provide will give everyone looking more to see and quite possibly touch on something someone else has seen.

Re: Oil starvation issues SBC HELP?
 

Yeah, I have raced Super Stock a couple of times. I don't know of any Super Stock racer using an acumulator, or any Super Stock racer that needs one. Guys going a lot faster than you are. Circle track cars that often run 25 to 30 laps around a circle track without lifting, is another thing. Your the one with oiling problems. You have someone like Carl Hinkson & Mike Taylor trying to help, but don't seem to want to hear what all your doing wrong.