oil accumulator

[upstand]

I just installed a Moroso oil accumulator with a Moroso Sandwich plate between the engine and filter. The accumulator T's into this plate after the oil goes through the filter and before it enters the engine. What alarms me is that on intial start-up my oil pressure is half(35psi) what it was before the accumulator installalation. Is this normal , will my pressure be back up to 60-70psi once the Accumulator is full of oil? Anyone else experience this? I only ran it for 15-20 seconds. I had to sleep on it.By the way just a little 500hp 383.

[mytmouz]

What size lines are you using?

[upstand]

2.5 feet of -10 from the adapter to the accumulator.

[topsportsman1]

How much air pressure did you put into the accumulator?

Do you have a manual shut off valve on the accumulator after it fills with oil?

[upstand]

85psi , bled it down to 5psi , started the engine with the filter prefilled with Redline 20W50.

[upstand]

Sorry , it has an electric valve.

[upstand]

Got a different filter , problem gone.

[topsportsman1]

Got a different filter , problem gone.


What oil filter was it? A FRAM? Let us know so others will not have the same problem.

Oh and 6lbs of air in the accumulator is enough air pressure to operate it.

Thanks, Tom

[Robert1320]

Got a different filter , problem gone.


What oil filter was it? A FRAM? Let us know so others will not have the same problem.

Oh and 6lbs of air in the accumulator is enough air pressure to operate it.

Thanks, Tom

Fram the number one killer of oil pressure.

X2 5-10 psi in Acc.

[billhendren]

We don't use or recommend accusumps for this simple reason. when your pan runs dry the accusump forces oil stored under pressure into the motor.unfortunately the oil pump is pumping massive amounts of air into the oil galley at the same time.the mixture of oil and air mix doesn't supply the hydro dynamic wedge of oil necessary to protect the bearings to make matters worse the oil pressure stays up so there is no warning light or needle drop to alert the driver,first thing the driver hears is a rod leaving the engine.
The solution is to fix the problem with oil return to the crankcase and use the accusump for pre oiling the engine but turn it off before racing so if theres a pressure problem the driver will see it before the loud bang.Bill

[racear2865]

We do as Bill does, we have accusumps on many of our motors. But only to prelube before start up. We use one on the dyno also. You will find that there is indeed air trap in the container. Remove the intake and or watch at the rockers and you will see aeration. And Bill is correct in that the hydo dynamic wedge is lost if engine is running. You will need to make a decision which is worse, a drop in pressure as a result of starvation in the pan or aereated oil. Both are killers of engines. My opinion.
racear

[upstand]

It was a STP filter .
Hmm I'm going to have to think about what you guys said. I really only need it at the end of the 1/4 mile while slowing down and I did add two additional Qts of oil.

[curtisreed]

Here is some reference material on oil filters if anyone is interested.

http://minimopar.knizefamily.net/oilfilterstudy.html

http://minimopar.knizefamily.net/oilfilters.html


Curtis

[billhendren]

It was a STP filter .
Hmm I'm going to have to think about what you guys said. I really only need it at the end of the 1/4 mile while slowing down and I did add two additional Qts of oil.
If you only need it when your slowing down that means you were out of oil in the pan or darn near out or your baffles aren't working. we had a customer who put his own engine together and had the same type problem,when we took the mail order pan off the problem was clear,the baffles were installed backwords so they delayed oil from returning to the pickup. a non offshore pan fixed the problem. if your pan is ok next time the engine is apart you need to fix the drain back issues and that problem will go away.Bill

[truk]

i to have that same problem . with a stock 460 ford block and how do you fix the drain back problem? any ideas?

[upstand]

It's a claimer 7qt circle track pan with trap doors. A champ pan I think it's called.
To be honest I thought it moght be the problem , putting the accumulator on was just easier.