[bottlefed1]

^^^^^^^^^^^^^^^That's funny.

The accumulator pressure is directly proportional to the engine oil pressure,
The accumulator is empty when the engine oil pressure equals the accumulator stored pressure.

This is true but what I think montys55 was illuding to is that if you set the accumlator pressure to 100 and you only have 80 psi of oil pressure your not likely to move the accumulator piston any hence no oil stored. Naturally this would be an extreme case but say you set it at 20 and with the piston all the way back the pressure rose to 50 and your idle oil pressure on the top end after lifting and coasting at idle was only 30 lbs...so now the accumulator piston has pushed out most all of the oil and you make the turn off and it drops to near zero and you only have a little oil left in reserve. I assume this is why they suggest setting the lower setting for the average Joe who may really need this sort of band aid for a poor oil system.

 

[yeti]

Stop all this nonsense and just put the empty pressure to 5-6 PSI. If you don’t understand why, don’t ask, just do it.

 

[Srt8line Performance]

I use an electric valve, hook it up to my ignition. When I turn the engine off it closes with 75 psi ( engine oil pressure ), when I go to start the motor I turn the ignition on and before I start the engine it gets per lubed. Love that feature, besides it being a safety net.

 

[Gary Anderson]

What size line and where are you plumbing this to on the block? BBC?

-10
Yes, Tall deck BBC.
To the Moroso adapter on top of the oil filter
We run 20# because If the engine oil pressure drops I want the oil to the engine NOW!
We broke a push rod in the engine.
0 damage to the bearings.
Bearing have always been VERY clean upon inspection.

Like I said, we have a -4 braided line to the mechanical gauge, this size line will show EVERY pressure variation, I KNOW the engine will loose some oil pressure when we pull the chute and brake hard.
We have NEVER seen a variation at all...ever.

This setup flat works.
I would LIKE to make a manifold that plumbs directly into the oil galley holes in the side of the block.
This would give better protection to the bearings.

Some Stock class racers used to run 3 quarts of REALLY light oil,
like straight 10 wt, in the pan and have that accumulator set with the extra 3 quarts under pressure for when the oil pressure dropped.
The less oil in the pan = MORE horsepower!

Your Pal Gary

 

[Gary Anderson]

This is true but what I think montys55 was illuding to is that if you set the accumlator pressure to 100 and you only have 80 psi of oil pressure your not likely to move the accumulator piston any hence no oil stored. Naturally this would be an extreme case but say you set it at 20 and with the piston all the way back the pressure rose to 50 and your idle oil pressure on the top end after lifting and coasting at idle was only 30 lbs...so now the accumulator piston has pushed out most all of the oil and you make the turn off and it drops to near zero and you only have a little oil left in reserve. I assume this is why they suggest setting the lower setting for the average Joe who may really need this sort of band aid for a poor oil system.

If the idle pressure is 30#, the accumulator, with the pressure behind the piston is set at 20# will NOT empty itself of oil.
The engine side oil pressure HAS to drop to LESS than 20#, for the accumulator to work.

If the engine oil pressure stays ABOVE the air pressure in the air side of the accumulator, the accumulator will NEVER be able to push the oil out.
The accumulated oil HAS to overcome the pressure that the engine makes.

Your Pal, Gary

 

[yeti]

We run 20# because If the engine oil pressure drops I want the oil to the engine NOW!
Your Pal Gary

I can’t (don’t want to) believe you people don’t understand this. When the engine is running, the pressure in the accumulator is exactly the same as in the engine. If you put 20 PSI in the empty accumulator, the engine oil pressure has to be more than 20 PSI to push any oil into the accumulator. When the engine oil pressure drops below 20 PSI, the accumulator is empty, it can push no more oil into the engine. If you engine oil pressure drops below 20 PSI, it certainly needs more oil. The only way the accumulator can add oil to the engine is if the empty pressure is below the minimum you hope to ever see in the engine. The more pressure you put in the empty accumulator, the less oil volume it will contain when the engine is running. The reason you put only 5 PSI in the empty cylinder is so there will still be some oil in it to push into the engine if the pressure drops that low, when you really, really, really, need it.

 

[ZERO260IN1]

An engine isnt gonna go from 60 psi to 20psi and sit there and wait till the accumlator empty's for your above senario to hold water. Thats not realistic


Picture this...Your 50- 70 psi or so going down the track, the oil either pumps dry out the pan, sloshes away from the pick up from braking and drops fast, accumalator is full of oil because of the 50 psi the motor just ran at and shoots 20psi of oil into the motor.

 

[ZERO260IN1]

I set mine at 20

The way I look at it , it just prolongs the 20psi the motor just dropped to for 3 or 4 more seconds. If someone needs more then 3 seconds of oil at pressure, he either has a major flaw in his oil system, or his car is WAY to slow, lol

 

[yeti]

Please.

Once again, no matter what the initial pressure of the empty accumulator, when the engine is running the pressure in the accumulator is exactly the same as the pressure in the engine.

The floating piston is constantly moving back and forth when the oil pressure changes.

In fact, for that reason they get full of junk, dirt and metal flack, from the engine and need to be disassembled and cleaned regularly, especially if a parts failure has occurred. They are constantly pumping oil in and out.

All any more pressure than 5 PSI in the accumulator does is reduce the volume of oil it holds at any pressure.

Imagine it this way, how much oil could get into the accumulator if the empty pressure was set to 200 PSI?

 

[yeti]

I set mine at 20

The way I look at it , it just prolongs the 20psi the motor just dropped to for 3 or 4 more seconds. If someone needs more then 3 seconds of oil at pressure, he either has a major flaw in his oil system, or his car is WAY to slow, lol

When the engine oil pressure drops to 20 PSI, the accumulator is empty, it can push no more oil into the engine.

 

[ZERO260IN1]

Please?

You got it figured out Yedi master, who am I to disagree


Carry on

 

[yeti]

Yes, please. I don’t see why you (all) can’t understand this.

If you put 20 PSI in the empty accumulator, it is empty when your oil pressure drops to 20 PSI.

 

[yeti]

Please?

You got it figured out Yedi master, who am I to disagree


Carry on

LOL that's good, I'm gonna use that.

 

[ZERO260IN1]

It takes "Time" Yeti master


TIME

 

[yeti]

It requires oil volume, Grasshoppahh.

 

[351Blueblood]

I will add to the cleaning out of the accusump. I had mine on many many years thou. Just got like a mud sludge in there. I didn't think it could happen from the oil being filtered. I didn't take mine apart. I flushed it with diesel fuel. Fill slosh around dump repeat alot of times till clean. Move piston from end to end and repeat.

 

[yeti]

Take it completely apart and wash it. It isn’t hard at all and you won’t be disappointed for the effort when you see the junk that comes out of it. The instructions are on Canton’s and Moroso’s websites.

 

[BigLar368]

Yeti I understand what you are saying and I am not being sarcastic.

 

[Gary Anderson]

Yeti;
If you put 200# of air pressure in the air side of the accumulator, the accumulator will NEVER fill with oil.
UNLESS you had MORE than 200# of oil pressure.

Remember you can compress air, you CAN NOT compress liquid (oil).

Engine oil pressure of 70# oil pressure WILL overcome the 20# of air pressure.

This is simple physics, hydraulics and pneumatics.

The oil side and the air side of the accumulator are separated
by an aluminum piston that is the inside bore dimension of the accumulator tank.
The piston is approximately 1" thick.
This piston has two O-ring grooves just like a piston ring.
This piston with the two O-rings is what separates the air side from the oil side.

This whole deal operates like the pistons in your engine except
pressurized oil is on one side and pressurized air is on the other.

If anyone can NOT understand the physics of pressurized air and oil, I give up.

Your (frustrated with lack of understanding!!!) Pal, Gary

 

[Gary Anderson]

Yeti, I don't know if you were agreeing or not, I think YOU understand.
Sorry for the confusion!

Your Pal, Gary