dmottaway
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| posted on 16/1/05 at 06:40 PM |
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oil accumulators............again
on the list recently was a discussion of oil accumulators as they pertain to regaining oil volume after chopping the oil sump to gain ground
clearance.
the conclusion was that an Accusump or similar product was not a viable solution to the problem because of air ingested by the pump during periods of
oil surge.
I believe this missed the point of the Accump in that you have to have a properly designed baffle in whatever sump you have to avoid the surge. The
Accusump will not prevent the pumping of air, just minimize the effects of it.
however, another point I have uncovered is of concern. when installed, oil does not flow through the Accusump, but is instead held in reserve for
when you do suffer a loss of pressure. which means the oil never warms up, and in ideal conditions (no loss of oil pressure) would never be used!
So I propose an alternative. could you not run the oil line to a tank like a dry sump system, and then back to the engine? If the tank were air
tight and had a cutoff valve on the out put side (to prevent draining when the engine is not running - like the accusump) the captive air would
maintain pressure, help when pressure was low, eliminate air picked up by the oil pump in a surge situation, and allow all the oil to circulate.
any thoughts??
dave
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Trev Borg
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| posted on 16/1/05 at 06:51 PM |
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I have read a view of the sites in the US when looking into these. Apparently the tanks do get very hot when in use.
The air pressure in one side is about 4 PSi i think (correct me if i'm wrong, i can not remember these things at my age). While driving the
pressure in the other side will change dramatically with revs, so that the piston in the tank will be moving back and forth. This means that the oil
keeps getting changed. As oil pressure increases, hot oil is forced in, as pressure drops, the oil is forced back out.
I am still contemplating using one of these, or i might just fabricated a flatter well baffled sump will an oil cooler and some large pipes.
Before you judge a man, walk a mile in his shoes.
By that time, who cares.
You're a mile away, and you've got his shoes
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dmottaway
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| posted on 16/1/05 at 08:16 PM |
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I hadn't considered the constantly varying oil pressure.
but it still doesn't address the bubbles. too bad there is only one entrance/exit point.
dave
[Edited on 16/1/05 by dmottaway]
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