Accusump Oil Accumulator, Where to locate |
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Accusump Oil Accumulator, Where to locate |
MikeSpraggi |
Jun 16 2009, 02:21 AM
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#1
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Senior Member Group: Members Posts: 781 Joined: 7-February 05 From: Silver Spring, Md Member No.: 3,570 Region Association: MidAtlantic Region |
I'm thinking of adding an Accusump Oil Accumulator to my project DE/track car. The interior will have 2 seats but I would like to mount the accumulator so I can manually control it when starting the engine.
The one car I saw had the accumulator installed where the passenger seat is/was located so the driver could control it while strapped in. With two seats in my car, where else have any of you seen these units located? Thanks Race car this weekend at Watkins Glen with Accusump. |
messix |
Jun 16 2009, 02:35 AM
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#2
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AKA "CLUTCH KILLER"! Group: Members Posts: 6,995 Joined: 14-April 05 From: between shit kickers and pinky lifters/ puget sound wa.north of Seattle south of Canada Member No.: 3,931 Region Association: Pacific Northwest |
mount it the engine compartment and use this http://www.cantonracingproducts.com/cgi-bi...p;category=2425
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jt914-6 |
Jun 16 2009, 04:45 AM
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#3
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Driving & working on teeners 41 years Group: Members Posts: 1,786 Joined: 3-May 08 From: Bryant, Arkansas Member No.: 9,003 Region Association: South East States |
Got my 3 quart mounted in rear trunk with the 12 volt solenoid.......
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carr914 |
Jun 16 2009, 05:57 AM
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#4
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Racer from Birth Group: Members Posts: 118,992 Joined: 2-February 04 From: Tampa,FL Member No.: 1,623 Region Association: South East States |
Go for the electronic solonoid vs the manual and put it anywhere you want (the rear trunk is a nice spot)
Accusumps are such a nice addition to a Type4. I probably need to dig mine out & sell it, since I haven't had a 4 cylinder in years. T.C. |
degreeoff |
Jun 16 2009, 07:16 AM
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#5
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I like big butts and I can not lie! Group: Members Posts: 1,622 Joined: 9-February 03 From: Booowieeee MD (near DC) Member No.: 275 Region Association: MidAtlantic Region |
Mike has a six though....if one does not start the car for a week or so is it still ness on a six?
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carr914 |
Jun 16 2009, 08:00 AM
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#6
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Racer from Birth Group: Members Posts: 118,992 Joined: 2-February 04 From: Tampa,FL Member No.: 1,623 Region Association: South East States |
Wet-Sump vs Dry-Sump. The 911 engine is full of oil
T.C. |
MikeSpraggi |
Jun 16 2009, 09:35 AM
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#7
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Senior Member Group: Members Posts: 781 Joined: 7-February 05 From: Silver Spring, Md Member No.: 3,570 Region Association: MidAtlantic Region |
The track car I saw was a six. The reason this came up was I noticed the race car had the oil tank mounted where the gas tank originally sat which, is what I'm doing.
I asked if there were any problems with the front oil tank arrangement that they could alert me to. I was told during hard cornering, initially the car had experienced momentary oil starvation at times. They use the Accusump to maintain a constant oil feed and since installation, have not exeperienced starvation or loss of engine due to lack of supply. I understand that it can also help when starting the engine, but hey, that's why I'm asking (IMG:style_emoticons/default/biggrin.gif) . |
charliew |
Jun 16 2009, 11:27 AM
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#8
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Advanced Member Group: Members Posts: 2,363 Joined: 31-July 07 From: Crawford, TX. Member No.: 7,958 |
Be sure and use a minimum of .500 lines (10/12an is a lot better) and the closer to the motor the better. Also the short lines will cost less. Long lines on anything including air loose pressure. More volume means more pressure with the end of the line open. You need at least 10lbs per 1000 rpms, ie 7k at least 70 lbs pressure. The switch and lines will probably cost as much as the accusump.
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sww914 |
Jun 16 2009, 12:27 PM
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#9
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Advanced Member Group: Members Posts: 2,439 Joined: 4-June 06 Member No.: 6,146 Region Association: None |
Don't mount it in the passenger compartment. Mine blew up once and shot 2 quarts of hot oil everywhere. It was in the engine compartment and I'm really glad it wasn't right next to me.
My situation was a combination of small problems that led to it's failure, but still you don't want that thing next to you. |
SLITS |
Jun 16 2009, 02:10 PM
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#10
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"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None |
First, if a six needs an Accusump (hydraulic accumulator) there is something wrong in the installation of the dry sump tank. The tank outlet should be higher than the inlet of the pump to INSURE a flooded suction line.
And that's all I have to say about that! |
mudfoot76 |
Jun 16 2009, 02:38 PM
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#11
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Currently teenerless :-( Group: Members Posts: 946 Joined: 18-March 04 From: Carmel, IN Member No.: 1,814 Region Association: None |
I have a 2qt mounted in the rear trunk, an10 lines. My type4 is very happy with oil pressure when on the track.
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smj |
Jun 16 2009, 03:21 PM
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#12
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"Dude, Steve from Berkeley." Group: Members Posts: 591 Joined: 28-August 05 From: Berkeley, CA Member No.: 4,691 Region Association: Northern California |
I'm picking up a variety of opinions -- shocking! (IMG:style_emoticons/default/wink.gif) I've got an Accusump from the 944S I retired, sitting around doing nothing. I thought it might eventually be useful in a teener.
Sounds like everybody feels a Type IV benefits from an Accusump, but a 6 with a well positioned oil tank shouldn't for street applications, might for track applications. Fair summary? I believe my -6 will only see the track a couple times for grins, and will be setup for agressive street use. So it looks like I won't need the 'sump there, when I finally get around to cleaning it up. |
Matt Romanowski |
Jun 16 2009, 03:41 PM
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#13
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Senior Member Group: Members Posts: 878 Joined: 4-January 04 From: Manchester, NH Member No.: 1,507 |
No 6 cylinder car needs an accusump. If a dry sump car has an oil starvation issue, there is another problem that needs to be fixed. An accusump is never needed on a six.
Also, the 10 psi per thousand guidline is only up to about 50 lbs (at 7k rpm you need 50+ psi). After that, you are just burning horsepower to make oil pressure. |
SLITS |
Jun 16 2009, 04:09 PM
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#14
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"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None |
I'm picking up a variety of opinions -- shocking! (IMG:style_emoticons/default/wink.gif) I've got an Accusump from the 944S I retired, sitting around doing nothing. I thought it might eventually be useful in a teener. Sounds like everybody feels a Type IV benefits from an Accusump, but a 6 with a well positioned oil tank shouldn't for street applications, might for track applications. Fair summary? I believe my -6 will only see the track a couple times for grins, and will be setup for agressive street use. So it looks like I won't need the 'sump there, when I finally get around to cleaning it up. The dry sump is setup for POSITIVE oiling under all conditions (assuming a correct installation). Dry sumps are used for a couple of reasons: 1.) Positive Oiling 2.) Reduction of oil volume in the case (or sump) to avoid parasitic drag of oil droplets in the rotating assembly (takes horsepower away) Hell, Aerobatic capable planes use a dry sump system to fly upside down (at least for a few moments anyway). Wet sump systems suffer from a couple of problems: 1.) Loss of oil pressure when the oil moves away from the oil pump pickup in hard cornering / hard acceleration or deacceleration. 2.) Parasitic drag on the rotating components of an engine robbing horsepower. That spinning crank assembly creates quite a storm over the lake of oil in the sump. Deep pans, specially modified pans with baffles, crank scrapers and windage trays were developed to overcome this horsepower robbing drag. On a small 4 cylinder racing engine, I was once told that the dry sump system would add about 5 hp from the lack of the lake of oil ... maybe true, maybe not. Ok, that's enough. Wanna know more ... visit a library. Oh, an Accusump is a trade name ... the correct terminology is hydraulic accumulator ... the ones we used on the race cars were HAs from a Boeing 707 hydraulic system. |
brant |
Jun 16 2009, 05:10 PM
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#15
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914 Wizard Group: Members Posts: 11,639 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains |
also...
you really don't want to add weight to the rear trunk of a race car rules about weight apply to all weight... even oil weight. low, forward on a 914, as little as possible. I ran an accusump on the 4 race car but not the 6 |
smj |
Jun 16 2009, 06:17 PM
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#16
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"Dude, Steve from Berkeley." Group: Members Posts: 591 Joined: 28-August 05 From: Berkeley, CA Member No.: 4,691 Region Association: Northern California |
Appreciate the clarifications on all sides. Maybe the Accusump-brand hydraulic accumulator will go into the 968 if I start logging serious track time on it.
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jt914-6 |
Jun 16 2009, 08:10 PM
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#17
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Driving & working on teeners 41 years Group: Members Posts: 1,786 Joined: 3-May 08 From: Bryant, Arkansas Member No.: 9,003 Region Association: South East States |
I agree the six doesn't "need" it. The reason I have one in my six is to pre-pressure the oil system before starting the engine. I have oil pressure before I start it, so little or no bearing wear......
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70Sixter |
Jun 17 2009, 02:10 PM
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#18
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Member Group: Members Posts: 422 Joined: 3-August 04 From: Surf City, NC Member No.: 2,444 Region Association: South East States |
And for any Boxster guys out there, LN Engineering has adapter for Accusump. For our tankless "dry sumps."
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charliew |
Jun 19 2009, 04:24 PM
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#19
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Advanced Member Group: Members Posts: 2,363 Joined: 31-July 07 From: Crawford, TX. Member No.: 7,958 |
The next time someone tells you 50 psi is enough oil pressure at 7k go to nasioc or any forum that has high rpm motors and see what anyone that builds motors for a living thinks, 50psi might be fine on a 5k motor but thats all it will work on.
The idea is to have 10psi for every 1k at the hottest temp the motor will see and to run the thinnest oil that will hold that pressure. |
r_towle |
Jun 19 2009, 05:07 PM
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#20
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Custom Member Group: Members Posts: 24,588 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States |
SLITS cant just say one thing...he must finish...he couldnt stop himself....(IMG:style_emoticons/default/laugh.gif)
Rich |
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