Oil accumulator



Oil accumulator

Postby grumpyvette » February 24th, 2009, 10:32 am

basically an aux pressurized oil tank , that in most cases holds 1.5-4 quarts of oil in reserve, the engine oil pump pumps it full once the oil pressures in the engines oil passages is high enough, and feeds it back into the passages under pressure if the oil pump sucks air or the oil pressure drops, these accumulators are commonly hooked to a pressure sensitive valve AND frequently have a manual, or electrically controlled over ride,that can be used to trap pressurized oil, to pre-pressurize an engine before it is started, the oil can be manually routed to the engine to pre-prime the bearings and oil passages, before starting the engine, reducing wear, the engine keeps the accumulator filled while its running , and the accumulator normally has a pressure sensitive switch that cuts the ignition circuit off if oil pressure drops below 5-7 psi.
thus you've always got oil pressure during a race or the engines ignition cuts off before damage is done, if oil pressure drops under high g-loads,that uncover the oil pump pick-up.
despite the picture the accumulators mounted vertically and usually connected to the block near the rear into a oil passage at some point.
you idle back to the pits after a race or into your garage and while the engines running you throw the manual switch to trap the oil before turning off the engine, so its there for the next start up, if you turn the engine off, it would try to refill the passages due to the drop in pressure as its designed too otherwise.(yes in most cases the oil accumulator also has a electrical control valve that traps the oil if the ignition is switched off so you don,t totally depend on a driver remembering to flip a manual switch in many installed applications.)
related good info

viewtopic.php?f=54&t=985

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

http://www.jegs.com/InstallationInstruc ... -23900.pdf

http://www.4wheeloffroad.com/howto/3282/index.html

http://www.stockcarracing.com/techartic ... index.html

http://s2.pegasusautoracing.com/group.a ... D=OILACCUS

viewtopic.php?f=54&t=2187

read thru these

http://www.masterlube.net/questions.htm

http://www.moroso.com/catalog/categoryd ... code=13600

http://www.popularhotrodding.com/tech/1 ... setup.html

http://www.moroso.com/articles/articled ... code=13600

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read thru these

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

http://www.accusump.com/accusump.pdf/instructions.pdf

http://www.accusump.com/accusump.pdf/E.P.C.%20VALVE.pdf

How The Accumulator Works
The Accumulator is tapped to the pressure side of the engine’s oiling system. When the engine is running, oil pressure forces oil into the accumulator and compresses air ahead of it.
Figure 1: Under normal conditions, oil pressure keeps a reserve of oil in the Accumulator under constant pressure.
If oil pressure should suddenly drop because of hard acceleration, severe cornering or hard braking, air pressure immediately sends oil back into the engine. When the danger is over and the pump is once again supplied with oil, pressure in the engine forces oil back into the Accumulator where it is ready for the next emergency.
Figure 2: When oil pressure drops, air pressure sends the stored oil into the engine at the main oil galleries to prevent damage.
naturally youll want to have the required extra oil volume in the pan to fill the accumulator the first time and a gauge in the cabin to show its oil reserve pressure and a manual switch, or a opressure switch that cuts the ignition if oil pressure falls below 5-7 psi.All Accumulators store oil under pressure and automatically release that oil to the main galleries when oil pressure drops. Moroso Accumulators can also be used to manually pre-lube engines before starting to prevent cold-start scuffing and premature bearing wear.
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http://www.moroso.com/catalog/images/23930_inst.pdf
IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
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Re: Oil accumulator

Postby guysmontess » August 20th, 2009, 6:08 am

Grumpy,while this is not an accumulator,it is a pre-luber.I have one of these on my car,just to help prevent dry start up's.My car sits all winter long,and even in the summer there are times it may sit for a week or two,so I wanted something compact that would put a bit of oil to the bearings.Heres a picture,I have it mounted to the inner fender and teed into the front oil gallery with the oil pressure sender;
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Re: Oil accumulator

Postby grumpyvette » August 20th, 2009, 9:11 am

very similar concepts, btw thats a really great idea since almost all engine wear in an engine with a properly set up engines lubrication system occurs during the first minute, when oils cold, not flowing well and not reaching all the moving parts, instantly, that little extra effort probably will prevent a good deal of wear and allow the engine too last significantly longer
just some info,
you might need, depending on the oil pump used, rpms and clearances a chevy V8 will generally push some where between 2 and 6 gallons a minute thru the oil passages, your average oil pan sump holds at most 3 quarts ,while the engines running, and theres generally about 2 or a bit more quarts in the upper engine, (lifter gallery, heads)while the engines running, so when you induce high inertial loads is common for the oil pump pick up to become uncovered even in a baffled oil pan for a few seconds as that 2-3 quarts in the sump slams forward and back in the sump, because remember , lets say your engines only pumping 3 gallons a minute, and theres got to be at least 2 quarts in the sump to keep the oil pump pick-up covered under high inertial loads, its only going to take a few seconds at most under those conditions to suck air into the oil pump.
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IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!
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Re: Oil accumulator

Postby guysmontess » August 20th, 2009, 10:26 am

It sends about 2/3rd's of a cup of pressurised oil in through the oil gallery.It doesent sound like much,but if you had that much in an oiling can and started pumping,it would be quite a bit.I also installed a Stefs oil pan heater,along with a block heater.We live in a slightly colder climate,so on chilly mornings,I plug both in for 1/2 an hour or so,it sure helps reduce warm up time.
Guy
1986 Monte Carlo SS 468 Big Block,UDHarold Custom Solid Roller Cam,.668 Lift,243/249 Dur. @ 0.050,Isky EZ Roll Lifters,Manton Pushrods,Jesel Rockers,Doug Nash 4+1 5 speed,Hurst Inline Shifter,Ford 9 Inch w/3.00:1 gear
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Re: Oil accumulator

Postby brad.arcova » October 18th, 2009, 11:28 am

The pre-luber in the picture above looks like the AmsOil AMK-02, has anyone tried this product?

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Re: Oil accumulator

Postby grumpyvette » December 12th, 2011, 5:53 pm

http://static.summitracing.com/global/i ... 0_inst.pdf

http://www.summitracing.com/parts/MOR-23900/?rtype=10

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http://static.summitracing.com/global/i ... ctions.pdf
yeah, I used one very similar to this one linked below in my 1968 big block corvette race car , along with an oil cooler with a 1000cfm electrical cooling fan and a 8 quart baffled oil pan.
I don,t know if things have changed but we used to have a manual lever valve, you throw while the engine idles that captures and holds 3 quarts,they also make a valve that works electrically with a switch, if it works thats ideal,the couple we had failed regularly but that was back in the mid 1970s Im sure they got that fixed by now, this three quart capacity in the accumulator is always held in reserve with the engine running so that is oil pressure in the block passages starts to fall its forced in to the blocks oil passages to protect the bearings like if you hit the brakes at the lights at the end of the strip, and if the oil pump pick-up became uncovered for a few seconds it would prevent air being sucked into the blocks oil passages,by back-feeding pressurized oil, you also manually throw the lever valve just prior to starting the engine as it prefills the oil passages and keeps them pressurized as long as the engine runs, and for several seconds after its shot off if you don,t remember to throw the valve before turning off the engine to hold the three quarts in reserve for the next engine start, or if you have a electrically controlled valve throw the switch.

http://www.summitracing.com/parts/mor-23900
http://www.summitracing.com/parts/ctr-24-006
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http://www.summitracing.com/parts/der-15870
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viewtopic.php?f=54&t=4537&p=12073#p12073

OBVIOUSLY you have the option of installing an oil accumulator AND/ORa separate auxiliary electric powered oil pump to pre-prime the engine and pressurize the bearings prior to start up, and because most engine wear occurs during the first 60 seconds under low oil flow conditions adding a pre-presurized oil flow system should in theory add to the engine durability, but having both is the ideal combo because you don,t have to remember to get out and close the accumulator valve while the engine idles ,before you turn it off, and the accumulator thus always works because you cant forget to open the valve to activate it either... btw the diagram below shows the accumulator positioned horizontally, thats a big NO! NO!, it needs to be vertical with the gauge on top to function correctly

http://www.thinkauto.com/oilpumps.htm

http://www.rbracing-rsr.com/oilsystems.htm

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remote filter style, I can tell you from experience that your oil feed lines too the oil cooler and remote mount filter must be AN#8 or 1/2" inside diam. or larger to maintain oil pressure at all rpm levels, you'll go crazy chasing interment oil pressure issues with AN6 lines , I,ve seen so many guys do that
http://www.summitracing.com/parts/MOR-23683/
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obviously these won,t fit all chevy applications but if you have the room for the longer, spin on filters, especially if you use the dual remote mount ,they provide more filter medium and less restriction to flow plus some minor cooling and oil capacity

The "longer high capacity oil filter" Purolator is L40084.
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"longer high capacity oil filter" N.A.P.A: # 1794
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"longer high capacity oil filter" ACDelco: PF932
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http://www.cantonracingproducts.com/cgi ... key=25-106

http://www.advanceadapters.com/category ... +Kits.html

http://www.hrpworld.com/googlebase.cfm? ... on=product

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IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!
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Oil accumulator

Postby MaxiMl » January 8th, 2015, 4:53 pm

The size of the accumulator doesnt matter, you use the same amount of oil no matter what size the accumulator is. The oil doesnt stay in the accumulator, it gets dispersed through the system with the refrigerant. So yes, use PAG 46, since its going to get mixed with the oil in the condenser anyway.

The total system oil capacity is 7 oz. You know how many ounces you put in the condenser and compressor right? So if you put say, 3 oz in the condenser and compressor, that means you need to put 4 oz in the accumulator to give you 7 oz total.
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Re: Oil accumulator

Postby grumpyvette » January 8th, 2015, 7:03 pm

MaxiMl wrote:The size of the accumulator doesnt matter, you use the same amount of oil no matter what size the accumulator is. The oil doesnt stay in the accumulator, it gets dispersed through the system with the refrigerant. So yes, use PAG 46, since its going to get mixed with the oil in the condenser anyway.

The total system oil capacity is 7 oz. You know how many ounces you put in the condenser and compressor right? So if you put say, 3 oz in the condenser and compressor, that means you need to put 4 oz in the accumulator to give you 7 oz total.



your referring to an ENTIRELY DIFFERENT SYSTEM AND COMPONENT, look at the diagrams and read thru the links

yeah! we all make mistakes I know Ive done my share! :oops: but in this case the two systems are TOTALLY DIFFERENT
IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!
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Re: Oil accumulator

Postby philly » January 8th, 2015, 11:39 pm

grumpy would this effectively increase your oil capacity siliar to what a kickout panel or bigger sump pan would do? or is this only in reserv and not really a part of the oil circulation?
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Re: Oil accumulator

Postby grumpyvette » January 9th, 2015, 9:56 am

yes it most definitely acts as an extra capacity , and while its not as effective as having an 8-9 quart baffled oil pan in some respects its even better in some ways, as it can allow use of a smaller oil pan, that provides more ground clearance and its not as effected by high G loads of braking, acceleration or hard turns, where a long hard high speed turn tends to pull the fluids in an oil pan away from the oil pump pick-up, the oil accumulator is UN-effected and continues to supply pressurized oil flow to the bearings for several critical seconds even if the oil pump pick-up sucks air.

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related info
viewtopic.php?f=54&t=65&hilit=baffle

viewtopic.php?f=54&t=64&p=1394&hilit=flow+slosh#p1394

viewtopic.php?f=54&t=2187&p=7231&hilit=drysump#p7231

viewtopic.php?f=54&t=1058&p=2016#p2016
IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!
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Re: Oil accumulator

Postby philly » January 15th, 2015, 12:35 am

interesting... so its kind of like a coaxial dry sump reservoir for your wet sump system. very cool
-phil

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