marco
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| posted on 18/7/13 at 09:39 PM |
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Accusump Size predicament for GSXR engine
I happen to have two of these a 1qrt (0.9ltr) and a 3qrt (2.83ltrs) version, both have manual valve opening which I have a cable for so I could mount
this under the dash.
I will be running a dash mounted PSI gauge to keep an eye on the pressure in the accusump and my GSXR sump hasn't been chopped/shortened, oh and
i also have an oil cooler.
So my question is which one would you run?. If I use the smaller one then leaving the valve open all the time would be an option but would this
provide enough reserve to counter the possible oil surge/pressure drop.
If I use the larger whch is nearly 3ltrs extra oil then leaving the valve open all the time woldn't be a good idea I'm sure, but it would
never run out of oil at the pickup 
I suppose I could run the small one first and watch the oil pressure in the accusump and see how low it drops compared with engine oil pressure?
Why is life always full of thes difficult choices 
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daniel mason
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| posted on 18/7/13 at 09:49 PM |
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were you having trouble with oil surge without the accusump?
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marco
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| posted on 18/7/13 at 09:53 PM |
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I knew I would forget something.
The 3qrt has always been fitted obviously without any oil surge issues of course, but I've often thought it a bit overkill for a 1 ltr engine.
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daniel mason
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| posted on 18/7/13 at 09:59 PM |
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if it works as it is.with no oil pressure issues,i see no reason to change!
how do you find the gsxr lump? i have just got a k6 motor for my project!
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marco
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| posted on 18/7/13 at 10:09 PM |
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quote:
Originally posted by daniel mason
if it works as it is.with no oil pressure issues,i see no reason to change!
how do you find the gsxr lump? i have just got a k6 motor for my project!
I have another much bigger engine project i could use the 3qrt on Daniel so I was hoping others that run an accsump would comment on what size they
use.
I have the k2 engine and it goes very well, re mapped by daytuner. Your k6 should be even better as they are a good few bhp more. My last Indy was
ZX900 and this is a different beast all together.
Did you get a good deal on the K6 if you don't mind me asking?
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daniel mason
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| posted on 18/7/13 at 10:12 PM |
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i thought so. ill pm you now and let you know
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twybrow
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| posted on 18/7/13 at 11:05 PM |
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I use a 2qt on my ZX12 engine - somewhere between 1 and 3 felt about right! 
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peter bland
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| posted on 19/7/13 at 08:17 AM |
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I run a k2 ,been in 4 years done many track days and loads of road use never had a surge problem our any other problems.It's fitted with a
baffle on standard sump. It's a great engine.
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marco
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| posted on 19/7/13 at 09:16 AM |
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quote:
Originally posted by peter bland
I run a k2 ,been in 4 years done many track days and loads of road use never had a surge problem our any other problems.It's fitted with a
baffle on standard sump. It's a great engine.
This one
I'm tempted to fit one of these as well then it's belts and braces, as mentioned I've ran the large one and done 2 trackdays without
any issue , but have another use for it.
Pity you're not closer Peter I wouldn't have minded a look at your car if possible?
Did you ever run out with the Ne'7rs by any chance if so we may have met before, my old Indy was a black ZX900.
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peter bland
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| posted on 19/7/13 at 10:29 AM |
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Yes I've been out with the ne7ers, try to get to the meetings at the church mouse, but only been going for a year. If I find the time and the
wearhers ok I could fancy a trip down to north Yorkshire!
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Dopdog
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| posted on 19/7/13 at 11:22 AM |
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thats the baffle I have on my engine seems to work OK (its in a single seater)
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matt_gsxr
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| posted on 19/7/13 at 11:38 AM |
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quote:
Originally posted by Dopdog
thats the baffle I have on my engine seems to work OK (its in a single seater)
so the engine is rotate by 90deg
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bigfoot4616
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| posted on 19/7/13 at 12:11 PM |
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after losing an engine last year i now run an accusump on my R1 motor, andy bates recommended the 4 pint one(2 quarts). may as well not bother if its
to small for the job as i suspect the 1 quart one will be.
if you are dash mounting the accusump pressure gauge don't rely on it as your only oil pressure gauge as they are not very accurate.
i found mine was quite a few psi out when i was setting the precharge. it also doesn't match what the digidash says. i just use it as a guide to
show the accusump is working every now and again when under the bonnet.
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marco
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| posted on 19/7/13 at 05:54 PM |
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quote:
Originally posted by bigfoot4616
after losing an engine last year i now run an accusump on my R1 motor, andy bates recommended the 4 pint one(2 quarts). may as well not bother if its
to small for the job as i suspect the 1 quart one will be.
if you are dash mounting the accusump pressure gauge don't rely on it as your only oil pressure gauge as they are not very accurate.
i found mine was quite a few psi out when i was setting the precharge. it also doesn't match what the digidash says. i just use it as a guide to
show the accusump is working every now and again when under the bonnet.
I was starting to think the 2qrt one would be the ideal size, my gauge is a good quality racetech one, I agree with the canton guages the're
pretty bad. I will have a secondary engine oil pressure guage
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Dopdog
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| posted on 30/7/13 at 10:20 PM |
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I just looked on the accusump mail site and they say the 1 quart size for bike engines? I need more help with this one?
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marco
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| posted on 31/7/13 at 06:59 AM |
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Hope this helps, this is the reply I got from Canton
"Mark,
The 3qt Accusump is absolutely overkill on a motorcycle. The 3 qt is made mostly for 8 cylinder engines. On motor cycles the 1 qt is what we
recommend using. You will be fine swapping out the 3 qt unit and installing the 1 qt.
Thanks,
Canton Racing Products"
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bigfoot4616
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| posted on 31/7/13 at 05:21 PM |
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are they referring to a bike engine in a bike though? do they have much experience of BEC's, which is why i went with andy bates recommendation
as he certainly does.
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daniel mason
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| posted on 31/7/13 at 05:29 PM |
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^^^me to!
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Dopdog
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| posted on 31/7/13 at 05:58 PM |
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so what are we saying then the 2 quart is the one to go for? Just for info I nicked this from another forum
"I have always run wet sump on a hillclimb car, albiet on a busa. However, for sprints you are holding lateral g for longer than in a hillclimb.
1g equates to holding the engine around 45 degrees to the vertical, so if you haven't sufficient oil or the oil sucks out quicker than it can
replenish it - your in trouble. eg 8000rpm is 133 revs per second, so an oil pressure drop out for just 1 second or so is enough to damage your
engine."
Basically we need to make sure we have some backup, would anyone go for the electric valve over the manual? only reason I ask is you have a potential
electrical thing to fail on you.
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bigfoot4616
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| posted on 31/7/13 at 07:06 PM |
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i went for the EPC electric valve, not sure now whether i should of just gone manual valve. waiting for a new pressure switch at the moment as it
failed after not much use.
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Dopdog
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| posted on 31/7/13 at 07:54 PM |
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bigfoot do you have a one way valve fitted as well?
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marco
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| posted on 31/7/13 at 08:02 PM |
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quote:
Originally posted by bigfoot4616
are they referring to a bike engine in a bike though? do they have much experience of BEC's, which is why i went with andy bates recommendation
as he certainly does.
Yes a bike engine fitted in a car.
Considering the engine doesn't lean over in the chassis like it does when in a bike surely you would think the problem would be worse for bikers
than our cars ?
All these kit car owners that have suffered oil starvation is it because there sumps have been chopped to gain ground clearence therfore removing the
reservoir of oil surrounding the oil pick up, I wonder??
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Dopdog
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| posted on 31/7/13 at 09:00 PM |
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its different for a bike in that when it leans over or corners the oil is still pushed to the bottom of the sump so no starvation. For us it is
different in that the engine does note lean so the oil climbs up the side of the sump in hard corners to the extend if we are not careful sucking air
into the pick-up, hence the swivel pickup offered for our applications. I have read somewhere that Jim Spencer said he reckons his accusump activates
2 or 3 times a run.
I have note seen this in the Jedi but am too busy looking forward 
[Edited on 31/7/13 by Dopdog]
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bigfoot4616
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| posted on 31/7/13 at 09:47 PM |
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quote:
Originally posted by Dopdog
bigfoot do you have a one way valve fitted as well?
yes, my accusump is plumbed into the return from the oil cooler so a one way valve was needed.
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JimSpencer
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| posted on 31/7/13 at 10:52 PM |
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quote:
Originally posted by Dopdog
its different for a bike in that when it leans over or corners the oil is still pushed to the bottom of the sump so no starvation. For us it is
different in that the engine does note lean so the oil climbs up the side of the sump in hard corners to the extend if we are not careful sucking air
into the pick-up, hence the swivel pickup offered for our applications. I have read somewhere that Jim Spencer said he reckons his accusump activates
2 or 3 times a run.
I have note seen this in the Jedi but am too busy looking forward
[Edited on 31/7/13 by Dopdog]
Hi
Yup, depending on the circuit.
Obviously the reynard is running very soft slicks and big wings (for the size of the car) and when we run it on a long circuit sprint (Pembrey /
Anglesey) then the accusump kicks in quite often.
On a hillclimb I've only noticed it very occasionally though, as obviously the corner speed is generally less.
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