Accusump Upgrade
#1
Burning Brakes
Thread Starter
Accusump Upgrade
After a number of Accusump failures due to high oil pressure in the Porsche 986 Spec Boxster, Canton Racing Products has developed an electric valve upgrade kit.
The rubber membrane in the older valve units would rupture under pressure, allowing oil to slowly leak through the membrane. This resulted in the unit failing to hold adequate pressure. When you shut the engine down, the pressure in the accumulator would slowly drop.
The unit was designed for 35-40 pounds of oil pressure, and the Boxster usually pushes around 95 pounds.
Anyway, they've done away with the fragile membrane and developed a much sturdier valve unit. This is the older unit. The membrane could be accessed (and replaced) by removing the four large Phillips screws. The new unit is being sold through Summit Racing (free shipping) $227.
https://www.summitracing.com/parts/c...273x/overview/
I've had continuing problems with my Accusump for the past year and installed this upgrade yesterday. The install was easy peasy. We'll see how it works at Sebring. I'm not affiliated with these guys, but they were soooo helpful on the phone, getting this sorted out.
The rubber membrane in the older valve units would rupture under pressure, allowing oil to slowly leak through the membrane. This resulted in the unit failing to hold adequate pressure. When you shut the engine down, the pressure in the accumulator would slowly drop.
The unit was designed for 35-40 pounds of oil pressure, and the Boxster usually pushes around 95 pounds.
Anyway, they've done away with the fragile membrane and developed a much sturdier valve unit. This is the older unit. The membrane could be accessed (and replaced) by removing the four large Phillips screws. The new unit is being sold through Summit Racing (free shipping) $227.
https://www.summitracing.com/parts/c...273x/overview/
I've had continuing problems with my Accusump for the past year and installed this upgrade yesterday. The install was easy peasy. We'll see how it works at Sebring. I'm not affiliated with these guys, but they were soooo helpful on the phone, getting this sorted out.
Last edited by PLNewman; 01-31-2017 at 06:05 PM.
#3
Burning Brakes
Thread Starter
Make sure it includes the solenoid. Canton has the package for $203 (not including shipping) but it doesn't include the solenoid...and you NEED that.
https://www.cantonracingproducts.com...RIC-VALVE-KIT/
https://www.cantonracingproducts.com...RIC-VALVE-KIT/
#5
Nordschleife Master
https://www.amazon.com/Canton-Racing...ywords=24-273X
I've been debating on whether or not to install in my build. I have one from my 944LS3 car that I parted out. Never had the problem stated above even though I was 95psi under power.
#6
Burning Brakes
Thread Starter
#7
Instructor
Not anymore - put that into another car already. Now I just have a 20,000 mile engine sitting in the garage. However, I've seen engines pop because an accusump was involved. I've not seen one fail because an accusump was not involved. Just my experience. Gladwill took his out for the same reason.
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#8
Rennlist Member
Not anymore - put that into another car already. Now I just have a 20,000 mile engine sitting in the garage. However, I've seen engines pop because an accusump was involved. I've not seen one fail because an accusump was not involved. Just my experience. Gladwill took his out for the same reason.
#9
Instructor
#10
Rennlist Member
Not anymore - put that into another car already. Now I just have a 20,000 mile engine sitting in the garage. However, I've seen engines pop because an accusump was involved. I've not seen one fail because an accusump was not involved. Just my experience. Gladwill took his out for the same reason.
#11
Burning Brakes
Thread Starter
The 3-quart weighs a little over 8 pounds empty. I don't know about you, but 8 pounds ain't gonna put me in the TOP TEN.
Last edited by PLNewman; 02-01-2017 at 08:00 PM.
#12
Data shows it is "reactive". The issue is loss of oil pressure on some tracks, on some turns. At our local track there are two higher G right handers that are when oil pressure drops. Very momentary. By the time the accusump reacts and dumps in its oil, the drop is gone and no longer needed. So it never actually helps with the initial pressure drop, so any damage done is done. it is similar to a lot of the tranny cooler setup being used.....guys use no data to show the actual effect of the system. No Data, never happened......