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How-To: CVT hot air exhaust fan

4718 Views 7 Replies 6 Participants Last post by  gpinjason, 
J
4
new to this forum thing as far as posting but have found a lot of very helpful info on this site. radiator relocate, mimb 3" center snorkel and oil cooler all awesome write ups. thanks. when i was installing my snorkels i wondered if i could find a inline fan to help pull hot air out of the cvt. after a little searching found a bilge blower fan on ebay that i installed on the exhaust side of cvt snorkel to pull hot out out. and it works like a charm. camera wasn't cooperating when i was doing install so no pics, know ima gonna catch a lot of flack over this but plastic is back on and not coming off i can help it sorry guys. but the cvt exhaust snorkel crosses over the right side of the bike to the left over the shock support just like in 3" snorkle write up and thats where i installed, over the shock support. as u can see in pics i screwed and siliconed 2" straight couplers inside ends of fan but had to change that to 2" elbows. its at the shop getting carbs rebuilt and will take pics when it gets back. with plastics on of course. to find the fan just do a saerch on ebay motors for "bilge blower" there are several choices. it is a small fan but moves more air than u think. dont get impatient on pics gonna be a few days.​

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HeadC1
I have one similiar to this on my teryx but on the intake side pushing the air through. I just a wanted to let you know which one I used. I bought it at a local marine shop (West Marine), its also a bilge pump but 2" rubber couplings fit on each side of mine making it an easier install. I just went and looked at there website and couldn't find it but it was a 3" inline. A 3" rubber coupling was too big for it but I was able to stretch the 2" coupling over it.

Looking at your pics closer, you probably could have put couplings over yours too.
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phreebsd
what's the CFM rating of those blowers?
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J
cfm ranges between 150-180, in my experience they seem to be a better puller than a pusher fan
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H
HeadC1 said:
I have one similiar to this on my teryx but on the intake side pushing the air through. I just a wanted to let you know which one I used. I bought it at a local marine shop (West Marine), its also a bilge pump but 2" rubber couplings fit on each side of mine making it an easier install. I just went and looked at there website and couldn't find it but it was a 3" inline. A 3" rubber coupling was too big for it but I was able to stretch the 2" coupling over it.

Looking at your pics closer, you probably could have put couplings over yours too.
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Could you tell a difference in performance after this install?
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H
So what do yall think about this...one fan in the intake pushing air in, one fan in cvt intake pushing air in, and one in cvt exhaust pulling out hot air to keep clutches/belts cool. I wonder if you could tell a differience in performance with all three? I am also wondering how to wire up, just run a switch. Or guess it could be wired to the ignition.
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Polaris425
I would just do 1... not 2. IMO.
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gpinjason
hubbard1506 said:
So what do yall think about this...one fan in the intake pushing air in, one fan in cvt intake pushing air in, and one in cvt exhaust pulling out hot air to keep clutches/belts cool. I wonder if you could tell a differience in performance with all three? I am also wondering how to wire up, just run a switch. Or guess it could be wired to the ignition.
Click to expand...

I don't think the AIR intake would be a good idea... the idea "sounds" good, but you have to think about it... when the engine is idling, the fan is pushing too much air and it would just lean out and die... it would probably help on WOT run, if jetted correctly... in order for a fan to work on an air intake (kinda like a supercharger) it has to be variable speed according to RPM of the engine (like a super/turbo charger)... otherwise, you will be pushing too much air sometimes and not enough at others....

and you really don't NEED a fan in the CVT, but if you want to put one.. ONE is enough... and I would only suggest it if you are running heavy springs with big tires... the CVT is designed to cool itself...

just my 2 cents...
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