Oil accumulator, who uses one? Options

[qa1142]

How and where do you hook it up?

I get how they work, where do you pipe it in on 2.0L?

[jt914-6]

On my six, and I'm sure on a four the outlet for my Accusump is connected to the oil pressure switch connection. I mounted a short 1/4" pipe thread straight pipe, and then a 90 degree elbow. Mounted the -6 line from Accusump to one side and the pressure switch on the top. I'm using the three quart one with a 12 volt solenoid to turn in on and off. It comes on with the key switch and gives the oil pressure to the engine before starting....

[DNHunt]

Mine is under the relay board and tees into the oil return line of a full flow system.

Dave

[ME733]

...........I classify accusump as another "snake oil trick part of the month", a unnecessary part....which will eventually go defective and screw up your engine...I know this system has been around for quite some time...I know In an Ideal world it does what it is supposed to do...prelube the engine before starting.....BUT....the charged cannister of oil will leak down over time.(when you store the car for months at a time)....and...as a resivor in the oil system...it will refill when you START your engine...(after it,s bleed/leaked down over months of car storage)....SO when you start the engine.( you have all that excessive additional oil..1-2-3-quarts in the crankcase, which CAN CAUSE serious problems in and of itself, and you have ANOTHER 1-2-3- quarts of storage to refill ....BEFORE...the engine sees normal oil pressure to the bearings, (at low R.P.M.s)....which can be very low anyway, such as in a 911. I.M.O., and I know plenty or guys who removed them eventually,...the system is simply unnecessary...and will eventually cause you unnecessary grief......"the old saying of..KISS.. "keep it simple stupid" applies in this case.....AND if porsche (as an example) thought this system was such a great idea....They would already be in use...............My 2 cents worth....murray.

[qa1142]

thanks Murry

I worry same, I was not going to use the valve and let it empty when not running. I just am looking for insurance in hard corners

any other suggestions?

Will

[brant]

I very much disagree with Murray
if you've ever done the testing of a 4 cylinder in the corners you'll see what the real purpose of an accusump is.

I don't care about pre-oiling...
but in a race situation with a type 4, there is oil starvation

the stock 3psi light doesn't reveal that the oil pressure drops to about 7psi in the corners of any length.

at 7500rpm I don't find this acceptable.
the -6 dry sump system effectively solves this condition, but on a 4 the accusump is a cost effective way protect an expensive motor.

I've seen them mounted in race cars in the front trunk, passenger floor, and also the rear trunk. I mounted mine in the front trunk for weight distribution. You don't want any rear trunk weight on a -4 race car (I hate seeing batteries mounted there)

brant

[cary]

Aren't we talking about 2 different gadgets. Accusump for pressure and a catch tank for blow by from the PCV system?

You need something for starvation if your going to throw the car around. My two boys drove my 2 914's thru high school. They red lighted the cars everyday on the way home from school. 90 degree section corner they took at 40 miles an hour.

Now that dads going to freshen to cars up. That needs to be fixed. I'm thinking that I need both gadgets.

[Jake Raby]

These save wet sump engines. I require them on all my engines that will see track usage and retain a wet sump oiling system.

I even have one in my 996 track car. They work when plumbed correctly.

Oh, why didn't Porsche use them, well the same damn reason they didn't employ 99% of the other advancements that the aftermarket has developed. In a bone stock vehicle without slicks and hard cornering capability their use isn't nearly as effective.

Increase the stock engine's output by 100%+ and enhance braking and traction and its a whole new world.

[qa1142]

ok

So mine is street car, with some fun cornering and auto-X.

I just never want to see that light.....

Will putting the budget accumulator
http://www.jegs.com/i/Moroso/710/23930/100...roductId=745635

Tied into say my oil sending unit keep pressure up in corners?

Anny issue running with 5.5 qts and letting 1 qt sit in this unit when driving?

How is this solution vs letting deep sump hang below engine (which sounds like bad idea to me)

thoughts, comments?

Will

[sww914]

Absolutely necessary on the track with a type 4. After I went to sticky tires I destroyed my engine because I didn't have an accusump. Out of a long corner my oil light would come on for 5 seconds at least. I had a spare (better) engine that I hadn't installed. After that weekend I took the engine apart, rods knocking. My rod bearings looked like wads of smashed up pennies. ME733 doesn't have any experience with this obviously. Mine does not leak down, even if it sits for a month without starting the car.
My accusump is plumbed through the oil pressure sensor hole next to the distributor.

I never tried the Moroso unit. I thought about it but decided to spend the extra money and not worry about my decision.

[ConeDodger]

Very necessary on an AX or track car. I will proudly use "snake oil" on my next Raby kit motor...

[qa1142]

Who else makes units?

[GeorgeRud]

I remember running my 2.0 914 at IRP in the early 70s, and seeing the oil pressure light come on by the end of the first long sweeping turn, so there is certainly a need for more oil at the pickup in sustained cornering situations. Back then, we used a lot of extended sump kits, but the lowered clearance made them a marginal solution at best. There was a dry sump kit available back them (I think the Super Vees were using them), but that was only on race engines if I remember correctly. When the Accusumps came out, it did a reasonable job of solving the problem.

Unless you're going to be racing the car or autocrossing with race tires, I wouldn't worry about oil starvation. It probably is overkill on a street car (though anyone that has just spent the money on a rebuilt motor is understandably concerned about preserving the rebuilt motor). I'd ask Brad what his take is on the modification - I feel that he would have recommended it if he felt it was necessary for your application.

Maybe Jake would also chime in with his opinion!

[Smitty911]

How difficult is makine a Type IV a "Dry" sump?

[jt914-6]

These save wet sump engines. I require them on all my engines that will see track usage and retain a wet sump oiling system.

I even have one in my 996 track car. They work when plumbed correctly.

Oh, why didn't Porsche use them, well the same damn reason they didn't employ 99% of the other advancements that the aftermarket has developed. In a bone stock vehicle without slicks and hard cornering capability their use isn't nearly as effective.

Increase the stock engine's output by 100%+ and enhance braking and traction and its a whole new world.

(IMG:style_emoticons/default/agree.gif)
"They work when plumbed correctly"
I have a six and I'm not concerned about losing oil pressure in corners. My reason is to pre-pressurize the engine before start up. When you have a $8,500.00 + engine I think it's a good idea to make it last as long as possible. Getting oil pressure to the bearings before start up I think is a good thing..
I really don't think that you'll pressurize an engine by adding the oil from the Accusump into the crankcase in a four. The logical way to me is plumb it to the oil pressure switch connection. Putting oil under pressure, is what it does, will get to the bearings much quicker than through the crankcase/oil pump....Jake or someone else who knows can chime in and tell if me I'm wrong or if this is correct...

[Joe Bob]

I like them on 4 bangers, but don't see the need on a dry sump motor...

[brant]

big enought to guarantee that you blow your valve cover gaskets when you spin off track!

check here for the price is right

[ME733]

...........With the stock oiling system ...(not dry sumped).....there is no reason that the engine should see low oil pressure...that is to say sucking foam,or air...YOU have to think through this problem., and REALLY look at the oil pickup tube, how it,s held,sealed,and what /how the engine is assembled and with-out certain factory parts...2) then you need to look at the (not) quality oil pumps.....MELLING IS THE ONLY ONE TO USE....3)then with your ENGINE running, and hot., oil lines are full.cooler,s etc,...CHECK THE OIL LEVEL, with the dip stick provided by the factory. IF you havent figured out the fundenmental problems.....just add a deep sump, like the majority of racers do...If your still getting low oil pressure...blink several times...cause you ass is upside down...and you need to hit the kill switch....PS. to george rudd....Yes george, all the sucessful, professionally built FORMULA SUPER VEES had a dry sump system.P.S. to sww914..YES mcafee DOES HAVE experience with accusump., and have removed as many defective ones as I have installed per customer request..........GENERAL P.S....when the accusump fails..the 3-4 quarts of oil wind up in the crankcase., can and will /wind up flooding cylinders with OIL...then when you crank the engine...well you should get the idea., DETONATION, fouled plugs, unseated rings,broken rings,etc etc...BUT IT,s YOUR life and money so just do what the hell you want to do....my 2 cents worth.

[brant]

low oil pressure on race motors is not the cause of inferior parts, or assembly...

it is due to cornering forces.
We have always used a special sump with extended pick up
I have had multiple professionally built -4 race motors

the oil side loads away from the pick up and the accusump allows additional volume under these conditions.

best to actually test and see the facts
I suggest (what I did) that you install multiple oil pressure warning lights of different PSI. its interesting to see what happens.. even on a fresh 10K race motor with far superior blue printed oil pumps.

[Jake Raby]

I've never experienced a failed accusump unit, directly or indirectly.
I have experienced failed engines that would still be alive if they would have had the added protection afforded by the accusump when properly plumbed.

Like most other things, its all in the application. The installer's attitude and level of drive has a great deal to do with the success of the unit.

This post has been edited by Jake Raby: Apr 5 2010, 08:54 AM