macnewma

Thanks Claus, but don't go out of your way. If you get a chance to snap some pics at some point it would be great though.

Claus Groth

I hope that these photos show the accumulator well enough.
http://forums.rennlist.com/upload/02140003a.jpg
http://forums.rennlist.com/upload/02140004a.jpg
http://forums.rennlist.com/upload/02140007a.jpg

Claus Groth

I can't see them when I click on the link. Let's try this:

macnewma

Thanks Claus, that really helps. It is a pretty slick location for it, but it does make me kind of nervous there. I will have to think about it.

Eric in Chicago

Slick set up Claus! Keep in mind that location will only work with a non ABS car. On my 91 S2, I have a big ABS control unit in the pass wheel fender that would prevent the installation in that position. Drivers side fender has the gas tank breather canister.

macnewma

Should I be concerned about an impact at that location? Will it matter since the impact would stop the car anyway? What happens when the accusump is damaged?

J_Kapp

I went to their website and read some of the information that they have on it. They said that it uses the engines oil pump to charge the cylinder. I don't know if this is a dumb question or not but does this put more strain on the oil pump to a point where it could noticably reduce its life?

Thanks

Eric in Chicago

I dont think so, the charge, meaning filling the accusump, is just like if you added a 2nd oil cooler, just another place for the oil to flow. The oil is expelled from the accusump in a low oil situtation by compressed air that you put into the unit when you set it up.

Porsche-O-Phile

Also consider that the oil pumps on these engines are pretty damn strong. I'd bet they could outlast the engines themselves by a factor of 2 or 3, unless something went through 'em. . .

Claus Groth

The Accusump has a piston inside. On one side, you add 15 PSI air. The oil solenoid valve is a one-way electrical valve. Oil can flow through to the tank but electricity is required to open it to release oil to the engine. Oil flows into the tank up to the maximum pressure that the system attains while the engine is running.

I use the Accusump to pre-oil the engine before starting since it is started sporatically. I have also installed a second low oil pressure switch that is set at 30 PSI. If oil pressure drops below this setpoint, a dashboard light energizes and the Accusump discharges it's load. It resets automatically when pressure rises again.

J_Kapp

So if you fill it with 15psi air does it/can it run out when you're out on the track. I just kind of confused as to how this thing works but your last post was helpfull Claus. I guess it's the engineer in me that wants to know.

Also, I assume you could set the accusump to pump at any desired pressure, is this correct?

DanG

Engineers rejoice, read this:

http://www.accusump.com/acc_tech_how.html

Claus Groth

The Accusump is only a storage tank. Any time that engine oil pressure is higher than what is in the accumulator, more oil is pushed into the tank, increasing pressure.

mikjel

How often does your Accusump discharge it's load (dashboard light) when you drive on the track Claus, and when does it happen?

Claus Groth

The 30 PSI light only energizes when I slow down to exit the track. I have a switch to disable it during the cooldown lap so that it doesn't discharge then because I want to check oil level correctly when I get back to the pits.

I had an incident last year when I lost a quart of oil due to a dipstick problem and the light came on but the Accusump was manually actuated at that time.