oil cooler

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Joined
Jan 6, 2004
Messages
64
Location
Belgium
On thumpertalk.com I found this interesting question.
http://www.thumpertalk.com/forum/showfl ... ll/fpart/1

I know the question about an oil cooler on a husaberg has already been posed here. But there was not a conclusive answer.
So, what do you think :
-can it be done ?
-how to tap into the oil system reliably, to make sure that the oil pumps through ?
-what do you think of the oil cooler (Joe Racer Products) that is shown ?
-am I richt when i think that it is better to mount an oil cooler as low as possible ? Lets say at the same height as the crankcase.

Thanks in advance for any reply on this matter.
 
Hi Xmen,
Are you simply looking for an increase in oil capacity or are you wishing to actually reduce the oils operating temperature?
 
Hi Dale,
I am indeed interested in an increase in oil capacity . I know that oil temperature is not a problem. But i think that an extra amount of oil is in fact a good precaution for the engine. (And it is certainly not in the intention to further the service intervals.)
 
Hi Xmen,
The OEM oil pump is regulated to less than 20 PSI.
All else remaining equal any additional plumbing via said oil pump will reduce the net volume of delivered oil.

For what it may be worth:
A Increase the sump capacity and include a pump pickup extension.
B provide an additional oil bag for which the simple flip of a valve would top off the OEM sump.

Hope this helps.
Sincerely,
Dale
 
Dale,
Thanks for your swift reply. So if i understand you correct, the pressure of the OEM oil pump is not enough to ensure that an augmented totale volume of oil (the normal capacity plus the content of an oil cooler which is probably something in the order of 300 to 400 cc) is pressurized correctly. Does this mean that the actual quality of the lubrication of the engine would diminish ?
I wonder how this problem is resolved on the KTM that has the external oil tank. (that is : if the problem is resolved at all)
I have to say that i never saw a husaberg equiped with this item.
 
Xmen said:
Dale,
Thanks for your swift reply. So if i understand you correct, the pressure of the OEM oil pump is not enough to ensure that an augmented totale volume of oil (the normal capacity plus the content of an oil cooler which is probably something in the order of 300 to 400 cc) is pressurized correctly. Does this mean that the actual quality of the lubrication of the engine would diminish ?
I wonder how this problem is resolved on the KTM that has the external oil tank. (that is : if the problem is resolved at all)
I have to say that i never saw a husaberg equiped with this item.

Hi Xmen,
If I was to install such a cooler I would boost the OEM pressure to that which would compensate for said cooler pressure drop consequently producing near OEM pressure upon cooler outlet.
Dale
 
Dale,

Boosting the pressure on the OEM pump, can this be done ? Or does this mean that a larger pump must be installed. I never heard of such an item for a husaberg so i presume this idea is not simple to overcome...

kind regards,
 
Xmen said:
Dale,

Boosting the pressure on the OEM pump, can this be done ? Or does this mean that a larger pump must be installed. I never heard of such an item for a husaberg so i presume this idea is not simple to overcome...

kind regards,

With exception of idle and very low engine rpm increasing the pressure relief valve spring tension will boost oil pressure.
 
I will have to look more in detail into this, I was unaware that this is possible.
So there is a technical solution for the pressure issue.

I presume that the company that produces such a cooler/extra reservoir is able to procure the necessary adapters to mount it on the bike. I send them an e-mail to ask if they can.

Still, i start to wonder iff this is not a little bit more complicated than I thought... Mounting an extra reservoir, on the basis of a well prepared kit is one thing. But althering the pressure of a pump is something that seems to be in the domain of professionals.
 
Hi Xmen,
As with most the oil cooler is most likely operating in parallel with the primary lubrication galley. If this is indeed the case a reduction in low rpm oil pressure (and resulting delivery) will be the only concern.

If plumbed in series then the earlier posts of this thread will apply.

Hope this helps.
Sincerely,
Dale
 
Xmen
If all you are after is a little more oil capacity you be able to simply overfill the gearcase. I always put 1.3-1.4 litres in my pre 2001 and have not had any obvious problems yet - not even weeping from around the fill plug. This quantity will overflow back out the filler hole with the bike tilted about 10° to 15° to the right.

Does anyone know of specific reasons why it might be bad to do this?
 
Hi Brad,

My 2000 501 starts to pump oil up the breather hose into the air intake plenum after 4 or 5 minutes of sustained high rpm (5000+) and 3/4+ throttle settings, if I over fill as you suggested. For trail riding though it is great, it seems to insure oil gets to the rocker arms on the steep twisty up hills.

Joe
 
Thanks Joe. I suspected there might be a difference between how the pre to post 2001 engines react to overfilling as the arrangement around the cam chain between them is entirely different. Certainly the only time mine has spat oil out the breather is when I've fallen offof it.
 

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