I took off my carb coolant lines and have noticed a difference
but it wasn't what i expected.

I took a Raytek laser temp gun and took the temp of my carbs on the vforce at float bowls and with the airbox cover off

after running woods hard for about 30 minuites .
lines off gave me.
355-380 degrees that is pretty high .

i put the lines back on and measured the temp and it was 265-300 but never over 300 .

on my v the carbs run cooler with the coolant lines ON

alot of people may have to rethink the coolant line mods.

i will leave mine hooked up!!!

 

Thanx for this report! I was very surprised at your findings. I wonder what is making the carb bowls so hot when the coolant lines are unplugged? Is the heat generated primarily from the engine heads which is then transferred to the carbs or is it the front exhaust pipe (which passes near the carbs on its way to the back of the quad)? What do you think?

Happy trails...[img]i/expressions/face-icon-small-smile.gif[/img]

 

JOHN... thanks for the report... I guess I wouldn't have expected that much radiated or transfered heat either... there would likely be a way to "fresh air" duct a cooling duct to the carbs, they are, if I remember right, attached with a plastic / rubber collar, so it's unlikely that it is heat transfer, most likely radiant heat... wrapping the exhaust with header pipe wrap may turn out to be one of the best performance mods, if it helps the quad run cooler, increases exhaust scavenging, through higher exhaust gas temps, & keeps the carbs cooler as well...

I occasionaly use a light weight aluminum flexible duct, to route more cooling air to the radiator, through the stock head light holes... perhaps since this is very light weight, & moldable, & flexible, something similar could be used to duct cool air to the carbs... although I'm guessing it would not be required with the exhaust wrap...

MIKEY... this is likely amplified even more on the Prairies, with the addition of inner fenders that the Force doesn't have... more than likely, the engine compartment temps are much higher with less air flow, which could raise the carb temps even higher...

perhaps the Brute doesn't have carb coolant lines ??? if this is the case, perhaps it was the result of both the lower compression ratio, moving the radiator further away, & the lack of inner fenders to hold in the heat ???

 

If i heat wrap my headers can i take off the heat shields? I though i read the BF carbs were heated electrially?
thanks

 

I have the exhaust MUZZY wrapped.
it sounds even better
I used thermotec
thinking of a heatshield around the carbs next

....but the carb gets its heat from the cylinder heads they run 350 degrees even when the coolant is at 160-170 deg.
exhaust temps wrapped are 500-580 degrees front and back depends where you measure them

who would have thought???

 

perhaps the Brute doesn't have carb coolant lines ???

I couldn't see any when I looked one over. But, they may have been hiding on me.

Interesting info VFJ.

 

Here's a dumb question for you...if the Cylinder heads are 350 degrees and causing the carbs to heat up, is it possible to heatwrap the two cylinder heads (I only suggested this solution b/c the V-twin motor is water cooled)? I know this idea sounds crazy, but I have to wonder if it might keep the carbs from heating up so much? Anyone have any thoughts on this?

Happy trails...[img]i/expressions/face-icon-small-smile.gif[/img]

 

i think i have a decent solution:

the CVT transmission has a blower built in to it to cool the belt and it is discharged in the front of cyl 1 it is that bent plastic pipe if you can rig up a hose extension to it and face it between the cyl's at the carb bowls that should do the trick.


OR

I do custom turbos on cars and there is turbo heat shield (looks like aluminum foil on fiberglass sheet) this may be useful installed in the "valley" under the carbs.

or

do both and it should really cool it down

I will experiment tonite.

 

divot

 

Has anyone else checked the carbs temperature, is there a chance that you got a bad reading. How long did it take to remove the airbox to check the temperature. If you are moving how much air flow gets to the carbs and how cool are the carbs running then. Has anyone contacted Kawasaki to see why they installed the coolant lines thru the carbs. Lets not all jump to conclusions.