Oil Cooler Added to 06 Brute 750

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BISCUT

BISCUT

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Dec 28, 2011
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Added an oil cooler to my Brute. My sump just wen't from 2.7 quarts to 3.7 quarts. That's a good sized increase in oil. It made me smile and I got to wondering exactly, factually what the added sump capacity will do for me.

First, it feeds the need for all things mechanical and oil!! I'm not as obsessed as many on BITOG are, but not far behind.
blush.gif


So, what exactly does the added capacity do for me??? And I don't mean cooler running merely because of the "cooler" instal itself.
 
Well, you can definitely extend your OCI by 25%.

Back in the day, guys would add sump capacity to older BMW motorcycles with the intent of using cooler oil. The oil was cooler by 10 or 15 degrees if memory serves. Nice to have but the engineers account for extremes in use. If you "abuse" your machine it may give you a few more minutes before seizure.

By the way, I have an oil cooler on my BMW 1000cc. I have been told by a real, honest to goodness BMW expert mechanic that it was a marketing ploy and serves no real purpose. It still appeals to me.
 
Originally Posted By: Zoridog
By the way, I have an oil cooler on my BMW 1000cc. I have been told by a real, honest to goodness BMW expert mechanic that it was a marketing ploy and serves no real purpose. It still appeals to me.

Definitely not the case on the BF750; it actually works and lowers the temperatures significantly.

Biscut, I would agree the extra capacity **should** allow you to extend the OCI some, but as you know these machines are oil shredders. Without the oil cooler I would said the increase may allow the oil to run cooler, but that point is sort of diminished some, but I think it will still be cooler than it would with no increase and just adding the oil cooler.
 
Originally Posted By: 2010_FX4
but as you know these machines are oil shredders.
aren't they CVT? Oil should be for the one lunger only then.
 
Originally Posted By: dwcopple
Originally Posted By: 2010_FX4
but as you know these machines are oil shredders.
aren't they CVT? Oil should be for the one lunger only then.

They are CVT, but they are also V-Twins and the transmission (but not clutch) shares oil with the engine. Mine has made a 10W-40 into a 20 something in less than 10 hours.
 
Originally Posted By: 2010_FX4
the transmission (but not clutch) shares oil with the engine.
Confused. Please explain how a CVT has a transmission.
 
Welllll, a CVT IS a transmission, so I think you meant a clutch?

But you have to have a way to interrupt the power when the vehicle stops. Many of these types have a centrifugal clutch that slips a bit then engages completely at higher engine speeds. Others use a wet clutch design.
 
Originally Posted By: SteveSRT8
Welllll, a CVT IS a transmission
right, so how does the CVT share oil with the engine as FX4 stated? I thought CVT's on quads were dry belts running on primary/secondary clutches. Is the belt submerged in oil then?
 
Originally Posted By: ccdhowell
The engine and transmission share the oil, the clutch mechanism itself is dry and separate. The transmission has gears in it that allow forward and reverse speeds.


This is my understanding of it as well. Primary and secondary clutch is belt driven and dry. That much I can say for certain as I just changed my springs and belt and had my primary machined.
 
Originally Posted By: 2010_FX4
Originally Posted By: dwcopple
Originally Posted By: 2010_FX4
but as you know these machines are oil shredders.
aren't they CVT? Oil should be for the one lunger only then.

They are CVT, but they are also V-Twins and the transmission (but not clutch) shares oil with the engine. Mine has made a 10W-40 into a 20 something in less than 10 hours.


So true, these V-Twins tear oil up. Thats whay I posted to see what you guys thought. The temp drop is 20+ from many otherd who are using the same cooler set up I went with and they have temp gauge. I haven't gotten on installed yet...finishing s lot of work and reslly just trying to wrap it up caus I'm jonesin for a ride!!!
 
Wanted to add, these BF 750s are no stranger to 240F+ oil temps in ambient temps of 85F+. They really do run hot. My legs in shorts tell me a lot!!
cry.gif


Many have reported 190F to 210 with the oil cooler installed all else being the same. My situation wil NOT be anything measureable as I also installed a new a new exhust and re-jetted. Re-jetting, I've been told also can reduce running temps. Not sure...but that is what I was told.
 
Like all new quads I've seen for the past half-decade or so they are jetted lean from the factory to reduce emissions I guess. Most will see a performance benefit from richer jetting and run a little cooler to boot.
 
Originally Posted By: dwcopple
Originally Posted By: SteveSRT8
Welllll, a CVT IS a transmission
right, so how does the CVT share oil with the engine as FX4 stated? I thought CVT's on quads were dry belts running on primary/secondary clutches. Is the belt submerged in oil then?


I don't know about this quad, but the Yamaha Grizzly CVT system uses a wet centrifugal clutch and transfer case in engine oil. The belt, drive, and driven pulleys are dry and are always tight and NOT used as part of the clutch function. I suspect the kawi system is simmilar. Weights and springs are changed to alter the ratio change rates or RPM points. When I was looking at buying the Grizzly back in 2003 I was turned off by the thought of the CVT system as in a snowmobile where the belt IS used as part of the clutch. A little research cleared that up.
 
Originally Posted By: 47HO

Where did you mount the cooler on your Brute?


Mine fit well mounted vertically on the front cross member bars upper right side of the quad.
 
Originally Posted By: BISCUT
Originally Posted By: ccdhowell
The engine and transmission share the oil, the clutch mechanism itself is dry and separate. The transmission has gears in it that allow forward and reverse speeds.


This is my understanding of it as well. Primary and secondary clutch is belt driven and dry. That much I can say for certain as I just changed my springs and belt and had my primary machined.

Yes; this is correct and what I meant. Apologies if I somehow confused anyone. The clutch is centrifugal and it and belt are dry (outside the engine) and the transmission (low, high, reverse gears) and engine share oil. This system works really well and allows the power of the bike to transferred to the ground with a vengeance!
 
Originally Posted By: BISCUT
Wanted to add, these BF 750s are no stranger to 240F+ oil temps in ambient temps of 85F+. They really do run hot. My legs in shorts tell me a lot!!
cry.gif


I know that is right! My legs in heavy blue jeans still "feel the heat".

Originally Posted By: BISCUT
Many have reported 190F to 210 with the oil cooler installed all else being the same. My situation will NOT be anything measurable as I also installed a new a new exhaust and re-jetted. Re-jetting, I've been told also can reduce running temps. Not sure...but that is what I was told.

I plan to take the front of mine apart soon and mount the Derale cooler that I bought. It has a fan on it and I am waffling on whether I should install it as a pusher or a puller. I am also going to install a oil temperature gauge and a water temperature gauge at the same time. I should have another UOA of the T6 soon and will post so that we can see how it is holding up.
 
Thanks for the willingness to share the T6 analysis. I'm leaning toward running it all year...just to not have to stock Rotella T and the T6. Especially since you have been running the T6 in the front locker.

Check your PM...I just received my first analysis of the 04 F-150. Was going to ask your thoughts.
 
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