Accusump Information Request

[prolego]

Has anyone on this forum tried a device called the Accusump?
It a 2 or 3 quart preoiler you activate before starting the engine and also will provide oiling if the oil pump for any reason draws air.

Sounds good in theory but does it work as good in the real world?

http://www.accusump.com/

Any information would be helpful.

Thanks

 

[KGP]

Sounds good in theory but does it work as good in the real world?

http://www.accusump.com/

Yep, sounds good in theory. There are similar devices being sold in the marine market. From those manufactures, they make the case that 90% of engine wear can be attributed to cold start conditions, something that in theory these devices prevent; a lack of lubrication and pressure at startup.

I have contemplated the possibility of tossing one in the boat should I do a mill upgrade. I'd like to hear some responses from some other, more engineering oriented members.

 

[bayareansx1999]

i dont think these things really work.. .dont you think if it did work, HONDA or ACURA would of installed them onto their cars? i mean for the cost of an NSX it wouldnt put that much of a dent into installing one of these to their cars...

i am also sure that by installing one of these, it will definitely VOID your warranty

 

[Jimbo]

Do a forum search. You'll find a number of people who use the Accusump.

-Jim

 

[KGP]

i dont think these things really work.. .dont you think if it did work, HONDA or ACURA would of installed them onto their cars? i mean for the cost of an NSX it wouldnt put that much of a dent into installing one of these to their cars...

No, I don't necessarily think that. There are plenty of aftermarket accessories or parts that are better than OEM, of which I am sure that Honda could equip the NSX with for little extra expense. I try not to drink the 'purple kool-aid' from any manufacture. I'd rather educate myself and make an intelligent decision.

I can say that I have a friend who recently damaged a $20K boat mill due to oil starvation, one of the two conditions the Accusump is designed to eliminate. The Accumsump just seems to make enough sence not to be a worthless gimmick.

Now, is there anyone with some objective technical analysis on these?

Do a forum search...

Thanks Jimbo. I will read through those.

EDIT: Good info in search threads.

 

[Lud]

Pre-oilers do work and are used in a number of applications. That being said, you have to look at what you are trying to fix in this application. Is a pre-oiler going to extend your NSX engine life in a useful manner (i.e. well beyond the point where you'd normally need to replace or rebuild it)? It's hard to say in my opinion. The pre-oiler manufacturers claim something like 80% of engine wear occurs at start-up. If that is correct, let's say the average well-maintained street-driven NSX engine will last 175k miles before needing a rebuild or replacement. How many miles do you realistically think you are going to get out of the engine with a pre-oiler before it needs to be rebuilt for some reason? 350k? 500k? 750k? 1 million?

But an Accusump is a good product for anyone who tracks their NSX heavily (esp. anyone pulling heavy G loads) because the NSX does not have a dry sump oil setup. This lack of a dry sump oil system can lead to oil starvation under high G loads. IMO the decision to use a wet sump system on the NSX was a poor one.

The Accusump offers advantages beyond a basic pre-oiler. It can activate as needed under extreme conditions where the engine might otherwise not get enough oil. This is not going to happen on the street, but can happen on the track.

Realtime uses an Accusump on P.D. Cunningham's #42 race NSX.

 

[ScienceofSpeed]

We have a complete system for the NSX being tested now. In addition to start up pre-oiling, the system also reduces the chance of oil starvation under aggressive track driving.

Cheers,
-- Chris

 

[supergreen125]

chris-
any idea if it will help solve the "oil burp" problem experienced by some of the FI guys?

 

[docjohn]

Chris keep us posted on your system,I believe most of the guys have simply installed standard systems,not designed specificly for the nsx.

 

[supercharged]

We used the 3Qt model successfully at the OTC this year;
I was very pleased. I'm in the process of writting up the details.

 

[docjohn]

That looks pretty sexy,were are your nsx logo mats,lol

 

[ncdogdoc]

MJ has been advertising this on his site for several weeks now. Probably based on the above setup.

 

[supercharged]

The trunk was stripped of all weight for the race, this is the easiest point to plumb but the mannual valve is a royal P.I.T.A. even for a track car ( but it did freak out our competition on pre-grid as we always sent a crew member into to the trunk to arm something).

Advise the automatic valve for this location or mount it in the passenger side footwell.

DH also installed one for the OTC to help avoid blowing another engine on the ALMS course which we ended up not running.

I'd consider for any car that sees a lot of track use.

 

[Andrie Hartanto]

I also have accusump mounted on the right rear quarter panel. Uses the electrical valve. The 3qt fits nicely in rear quarter panel. My car is not pure race car, this way, I can still use the trunk to carry track related stuff.

 

[supercharged]

Humm, three out of four NSXs that competed in this year's OTC used an Accusump; an I have it from a reliable source that the forth car will be adding one soon.

The external oil pressure gauge we added at the OEM filter location always indicated sufficient pressure. However the OEM gauge did show drops (almost to zero) at the end of long, high-rev straights.

I'm trying to figure out if this is real based upon the sensor location or if it is just a faulty sender.

In our system we are using an external cooler (in the radiator) so everything runs to the front and back. Interesting data; 90C at highway operations; 130C on our recon laps and 140-150C on our hot laps. The oil temp never exceeded 150; even a few times when the H20 overheated.


We also added additional crankcase vents as we were somewhat concerned about the drain-back part of the equation.

 

[Hrant]

The external oil pressure gauge we added at the OEM filter location always indicated sufficient pressure. However the OEM gauge did show drops (almost to zero) at the end of long, high-rev straights.

I'm trying to figure out if this is real based upon the sensor location or if it is just a faulty sender.

.

Greg, given the various mods on your race prepped NSX, it might be difficult to isolate the answer to this, but in my case it was a defective sender and there has been extensive discussion on NSXPrime of variations in oil pressure readings ......... and IMO, all leading to sender calibration issues.

Niello Acura is aware of this and they will be happy to ship you a unit at 30% discount ........

HTH

Hrant

 

[supercharged]

Hrant,
thanks! Missed you a track side this year!
See you soon,
PS - its my daily driver, I don't know what you mean "race prepped"

 

[tmeekins]

Not exactly sure how it works, but the concept is similar. A co-worker of mine has a Ferrari 360 and when he gets in the car the oil pump starts build pressure before the engine is started. I can't remember what triggered it, but I seem to remember him unlocking the door then immediately hearing the oil pump turn on and we hadn't even got in the car yet.

 

[The DON]

Supercharged:
The oil temp never exceeded 150? Maybe, just maybe the sensor maxed out at 150??

 

[supercharged]

Opps, to correct my faulty memory I went back and checked the gauge face; it should have read 120C on the hot laps ans 130-135C on the flyers.

 

[supercharged]

As seen here