Chip

iTrader: (3)

I know all the theory.

Anyone actually used them, share your experiences here please

Stavros

I havent, but fair few GTR owners have it seems, and from what they said is reason enough that im gonna go for one on my car.

A bit fiddly in operation, complicates the car even more, but as I have a standard oil system at mo, id appreciate all the help I can get.

Chip

iTrader: (3)

Yeah, my thoughts too, Pee Vee has one on his pug and ive seen enough of its operation to see that it DOES work, just wondered if anyone had long term experience of it, as he hasnt had his long.

Would have saved me a couple of cossie engines if I had one while arseing around doing donuts etc

gus

iTrader: (1)

yeah im gonna get one too


just dont know where to put tank (i have a stripped car with no room! figure that out)

how big a tank would you need?

Stavros

They are 2, 4 , or 6 pint, so none are mega big.

Idve thought just bigger the better.

COCHYN

I had one on my Focus, lasted about a week before she went up in flames (due to a completely different reason). But on start up, it was great because it didn't do the usual tap noise. Plus side of having pre-lubricated pistons before start up

Phil

iTrader: (1)

One person from the 205 forum used one on an mi16 and found it to be useless, but then mi16's have serious oil problems anyway They went for a dry sump in the end I think.

Stavros

I dont really get how that bit works? You activate it before starting the engine, right?

Surely that just dumps shitloads too much oil in, rather than giving oil pressure in the engine?

Doby

they look a good alternative to a dry sump set up.

COCHYN

On start up when the valve on the oil side is opened, the pressurised oil is released into the engine and pre lubricates the engine. The canister then holds whatever oil pressure the engine has at the time that it is shut off. After the engine is started and the oil pump has taken over, oil is pumped back into the Accusump. A pretty mint piece of kit, so simple and effective

Stavros

I know that, but how does dumping a ton of oil in to the sump or whatever pressurise anything?

Once engine running and pump moving I understand it totally, but dont get the oiling pre-engine start bit really.

pee vee

it pumps the oil into the oil gallery. so the oil is taking its usual path round the engine, but the air pressure in the accusump is what is pushing it,
not the oil pump.. (pumped into the engine via the Oil light switch-hole just after the oil filter)

depending on how you plumb it in, a one way valve in the system stops the oil from being pumped straight into the sump.. failing that the one way valve in the oil filter should do that too.


EDIT: as regards 'do they work/dont they work' well, i can see no real reason why they dont, or at least help anyway. IF you get the right size (car engine will need 4 pint Minimum)
Trouble is, the only time you will know for sure if its a waste, is when you see a rod

I know mine supplies the engine with just over 2 bar of oil pressure for about 10-15 seconds before starting the engine.

gus

iTrader: (1)

how do i know what size i need?

seen these on the bay.....
http://cgi.ebay.com/ebaymotors/Canto...mZ120284650769

look any good

for my s1 1600cc

pee vee

they come in 2, 4 and 6 pint ones mate.
2 pint ones are for bike engines really, and small engines like that.

i use a 4 pint one for my 1900 engine.

richard_syko

I think chip is looking for an accusump for surge in cornering rather than seeking a benefit under starting. These things only work when the oil pressure drops which is a bit late in my opinion. Best option is always a dry sump. Other benefits too like pulling a vacuum in the crankcase reducing friction.

pee vee

true, in theory these should work AS the oil pressure drops.. but TBH a dry sump is
kinda out of budget for my little track-hack.
so the accusump, along with a baffled sump,
and extra capacity is how i've (attempted) to tackle the issue..

sbd16v

sorry but thats a bit of a contradiction

yes they only work when oil pressure drops however they work to maintain pressure

in a oil pump failure i agree it is to late

but in a situation where you loose pressure for a second or 2 due to surge there imo ideal for that

leecavturbo

great for that engine you just built too as alot of damage is done
before oil pressure is present.

richard_syko

Its not a conradiction. The have to have reduced pressure to work. Then there is a delay before the they can maintain the pressure.

Chip

iTrader: (3)

They work as the pressure drops, BEFORE it gets too low in the first place mate.

Chip

iTrader: (3)

If its too big, you can end up with too much oil in the system, as effectively you could end up with 6 pints more oil in your sump than the normal amount.

Porkie

iTrader: (1)

I was going to fit one of my R34 as I was so scared on doing the bottom end in!

Keith Cowie used or uses one and rates it...

Ron Kiddel did use one and still fooked his crank and said they are a waste of time and effort... so I never fitted it!

pee vee

nah you wont, unless you empty the acumulator into the engine then shut the valve... as soon as oil pressure in the engine is higher than that charge of air in the accusump (usually about 10 psi) the oil is pumped back out of the engine and fills the accumulator...

so the only time you will have more than the usual amount of oil in the sump,
is at start up, or if the engine has just experienced surge... as soon
as the engine oil is back up to pressure,, the accusump is full again.

Chip

iTrader: (3)

pee vee, i didnt mean for long periods, apologies if i wasnt clear on that.

Stavros

But if not for long periods, whats the problem? Why not just have the biggest?

Far as I can work out, it will never have too much in a bad way?

Chip

iTrader: (3)

depends on the engine, but you could potentially get some breathing issues if it goes too high.

pee vee

i think you'd have to experience pretty bad surge to empty a 6 pinter into the sump TBH.
as said. mine (4 pnt) seems to hold 2 bar or more of oil pressure when the engine is turned off for about 10-15 seconds ... so for surge to last that long... thats a pretty serious corner!

Unsure if with engine on it will still supply 2 bar for that long though?? would the crank rotating make a difference?

EDIT: that said, like a lot of car related mods.. some people seem to get alright results, others dont!
and to 'test' a system like this,, your only gonna know if it dont work once!! lol