Hittade en negativ text om accusump i denna tråd:
http://www.zatzy.com/projekt/281105-tir-corvette-racing-edition-2009-a . . . .
Klipper in text som var inklippt i den tråden..
To the point of Accusumps - I would rather not plumb one of these into an oiling system. Rather I would rather install a good, well baffled oil pan of reasonable capacity.
The Accusumps rob your engine of oil pressure at the time it needs it the most.
How's that?
With a poor oil pan design, your engine will lose oil pressure in a hard corner or during a carousel corner at high G-loading. This is when the Accusump discharges it's load into the galleys.
once the G forces stabilize, your oil pump will now pickup oil and start to pressurize the galleys.
Here's the bad part - the discharged Accusump presents less resistance to the pressure than do the bearings - so where do you suppose the real volume of oil is going now?
That's right - to fill the Accusump.
once the pressure resistance is equal between the Accusump and the bearings, you'll start feeding both equally..
Think about what your car is doing and the loading you are putting on the engine when the lateral G-Forces are low after coming off a corner.
Yep - you're flat on the throttle coming off that corner - your engine is on a Dyno-Pull as it's trying to accelerate that car as fast as it can.
Meanwhile mister thirsty Accusump is drinking up that life giving booze...
If you're in a class that allows Dry-Sumps - definitely go that route. If not - or your budget just won't stretch that far - get a better pan.
Det går ju att lösa med en "tryckstyrd backventil", så den bara fyller på accusumpen när oljetrycket är tillräckligt högt i motorn, men det känns ju inte så bra att behöva hitta på massa extra grejor för att det ska funka...
och den viktigaste frågan är ju om accusumpen verkligen kan förhindra ett vevlagerras när oljepumpen suger luft.
Men eftersom Kenson skriver att den används på många ultimor så kan den ju inte var helt värdelös..
Nån som vet nån race serie som använder accusump?
Martin Ehrsson RS8
Äger 2st Urq 20v-90:or, RS8:a