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Old 12-13-2005, 04:01 PM   #1
ewright
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Default Anyone have experience with Accusump?

Hi everyone,

I was wondering if anybody has any experience with an oil accumulator such as Accusump. If so, would you mind sharing your experience? Any advice would be appreciated, thanks!

Ernie
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Old 12-13-2005, 04:19 PM   #2
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Quote:
Originally Posted by ewright
Hi everyone,

I was wondering if anybody has any experience with an oil accumulator such as Accusump. If so, would you mind sharing your experience? Any advice would be appreciated, thanks!

Ernie
What do you want to know? I haven't spun another rod bearing since I've been using it.

The only thing I'd recommend is using the manual valve, not the electronic one. The electronic one, IMO, generally doesn't act how I want it to - lets pressure build too slowly. I thought I'd like it because I wouldn't have to remember, but I don't...

Qs?
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Old 12-13-2005, 05:30 PM   #3
ewright
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zzyzx,

thanks for the reply. I was just curious as to whether you had experienced any oil pressure or other problems since installing the Accusump. In another words, does it work as advertised? I also was dead set on running the electronic valve but after reading your post I am definitely having second thoughts. With the manual valve, are there any adverse effects to forgetting to open or close it? Thanks again for the advice.

Ernie
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Old 12-13-2005, 07:40 PM   #4
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I second getting a manual valve. For the same reasons and stated above and because a manual valve has much less of a chance of failing.
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Old 12-13-2005, 11:21 PM   #5
ewright
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solo2wrx,

thanks for your reply. Do you foresee any potentially adverse effects from forgetting to open or close the valve?

Ernie
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Old 12-14-2005, 10:42 AM   #6
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Quote:
Originally Posted by ewright
solo2wrx,

thanks for your reply. Do you foresee any potentially adverse effects from forgetting to open or close the valve?

Ernie
Well if you forget to open the valve before starting there is a chance you could get oil starvation. If you forget to close the valve before shutting it off you just won't have any way to pressurize the engine with oil when you go to start it back up.
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Old 12-14-2005, 12:37 PM   #7
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solo2,

So if I forget to open or close the valve I simply lose the benefits of the accusump, but do not stand to do any more damage than if it were not to be installed?

ernie
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Old 12-14-2005, 01:52 PM   #8
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Just don't forget. Make it part of your pre-race/post-race routine.
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Old 12-14-2005, 03:15 PM   #9
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omahasubaru,

that sounds like good advice. my only concern is that I will forget to open or close the valve when I take the car out for the occassional weekend drive, but it sounds like it should be okay even if I forget to open or close it for the occassional grocery run.

ernie
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Old 12-14-2005, 04:24 PM   #10
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I would think your better off forgetting to close it then forgetting to open it back up. If you forget to close it no harm done just no way to pressurize the oil system before start up. If you forget to open it then you could be dealing with oil starvation is not enough oil is in the pan. This is basically what I stated above. Hope this helps you out.
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Old 12-14-2005, 04:42 PM   #11
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Hey guys,

I just want to offer my sincere thanks for all of your very helpful replies. I have decided to go with the accusump with a manual valve, hopefully this will keep my motor in one piece!

ernie
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Old 12-14-2005, 09:05 PM   #12
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Quote:
If you forget to open it then you could be dealing with oil starvation is not enough oil is in the pan.
if you check your oil level with the accusump full, and the valve closed, you will have the correct amount in the pan. so you will not be running the motor with the oil low. the accusump holds EXTRA oil
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Old 12-14-2005, 09:08 PM   #13
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Quote:
Originally Posted by kursplat
if you check your oil level with the accusump full, and the valve closed, you will have the correct amount in the pan. so you will not be running the motor with the oil low. the accusump holds EXTRA oil
I was simply stating if there isn't enough in the pan not that the Accusump carries any bit of the normal capacity.
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Old 04-17-2006, 12:57 PM   #14
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Hate to bump a old thread but how many quart accusump units are you guys running? Also when you state you don't like the electric valves, are you talking about the E.P.C. Valve?

I was thinking 2 quart unit with the 20-25 psi E.P.C. Valve... Can't do anything but help motor life. With the added insurance of the oil cooler and accusump I might just entertain the idea of spinning the stock long block upto 7500 -7750 rpm's...
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Old 04-18-2006, 08:34 AM   #15
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"With the added insurance of the oil cooler and accusump I might just entertain the idea of spinning the stock long block upto 7500 -7750 rpm's..."

The accumulator doesn't fix oiling problems other than starvation - like in a long turn.
It doesn't change the physics of the system. Yes, it holds more oil and there is some heat radiation but that's about it.
rz
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Old 04-19-2006, 04:05 AM   #16
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the accusump is of useful benefit to guys tracking their cars - and also of benefit is a true baffled sump. Not a ghetto one that you see being sold in some places - but a truly internally baffled unit.

the boxer and the pan layout with the oil return and the head breather design (especially on the 2.5s) means that when you pull Gs, there is a high probability of either losing the oil in the head (too much oil), or losing pressure (too low of oil, which people end up with such that it doesn't pour out of the head breather). You need to have a baffle and a reservoir. The cooler doesn't have much to do with it, unless you are truly heating it to the point of pressure loss (which i seriously doubt). We reccomend the accusump on all our customer track cars. And a baffled sump, and a surge tank, etc. etc. the 35psi EPC valve works fine. If you want fgaster fill rates (i.e. twisty track or whatever) then bore it out or go manual.

If you are running slicks, and a fast car, and you drive it fast, all of the above and more is needed. NONE of this is going to give you 8000 rpm. Some head work would, though.

-Pat
www.rocketrally.com

Last edited by patr; 04-19-2006 at 04:13 AM.
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Old 04-19-2006, 07:15 AM   #17
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Pat - Could you point me in the right direction for info on baffled oil pans? Much appreciate it...

Pat Olsen
'97 Legacy 2.5GT sedan
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Old 04-19-2006, 08:07 AM   #18
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Hmmm...I was planning on getting an oil cooler, but hadn't thought of an Accusump. Does anyone have a setup with an oil cooler and an Acuusump installed?
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Old 04-19-2006, 10:21 AM   #19
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patr - I hadn't thought about a baffled oil pan. I didn't know anyone made them for subaru's...

However I don't have quite the budget to do everything I want to do so I have to choose. Would you recommend a oil pan or accusump given you had to choose???
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Old 04-19-2006, 09:12 PM   #20
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Quote:
Originally Posted by mav1c
Hmmm...I was planning on getting an oil cooler, but hadn't thought of an Accusump. Does anyone have a setup with an oil cooler and an Accusump installed?
I don't know if there are any Subies running around with that setup, but it's pretty common in the Mustang/Camaro/Corvette open tracking crowd. The plumbing would be the same, of course, you'd just need to work out where to mount the pieces parts.

Quote:
Originally Posted by Ryokosman
patr - I hadn't thought about a baffled oil pan. I didn't know anyone made them for subaru's...
The only (potential) one I've seen is a pan from ARC advertised on a couple of the websites of guys that import hard-to-find Japanese parts. When I emailed about it the guy really didn't have any info, as nobody had ever bought one from him.

Pat
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Old 04-19-2006, 09:22 PM   #21
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Amazing, I'm speechless.
rz
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Old 04-19-2006, 09:48 PM   #22
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I am going to order a accusump any day now but haven't found a pan yet.
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Old 04-19-2006, 09:56 PM   #23
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Quote:
Originally Posted by mav1c
Hmmm...I was planning on getting an oil cooler, but hadn't thought of an Accusump. Does anyone have a setup with an oil cooler and an Acuusump installed?

is there really a reason for this? I keep hearing how the boxer engines are some of the best at cooling.

although a baffled pan sounds like a worthy investment. Maybe we can get someone to start making some?
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Old 04-20-2006, 03:13 PM   #24
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depends on how hard you want to run your car on track and how much extra engine insurance you can afford. considering the average track day in a wrx/sti will cost about a grand (entry, gas, brakes, tires, misc)... ~$300 for an oil cooler isnt too bad.

i personally have gone with out one for a while at 300whp but have one now that i am moving up to ~450whp...
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Old 04-20-2006, 03:40 PM   #25
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I have over 325 whp and track without a cooler now too. I don't have any guages but I know my oils gotta be kookin! It noticeably turns alot darker after a track day.

My car also gets rear hot out on track. The factory temp guage points about the 3/4 hot mark while on track. The oils gotta be feelin the heat.

Probably not real good for the motor but I run a 50/50 mix of 93 and 101 on a 91 oct map so I feel confident that I'm not gonna run into det issues.

I've already got a Process West oil cooler waiting to be installed.
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