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are there any advantages or disadvantages to having a fan cooled?
- are there any advantages or disadvantages to having a fan cooled?
started by 87srvsnow
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October 26th 2008 at 8:36 PM
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87srvsnow
Average Member
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988 Posts 
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Location: massachusetts, USA
Current Sled: 1987 yamaha srv
2008-2009 Miles: 26
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are there any advantages or disadvantages to having a fan cooled?
Bambi would have been a better and shorter movie if he was shot in the beginning with his mother
if a ride on lawn mower takes bumps better than your sled, its time to upgrade
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October 26th 2008 at 8:43 PM
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motodeficient
Waiting for more snow
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Usually they have less power but are lighter, more reliable and better on gas.
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October 26th 2008 at 8:46 PM
[ Modified October 26th 2008 at 8:47 PM
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87srvsnow
Average Member
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988 Posts
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o..do they do the job as good as liquid though?
Bambi would have been a better and shorter movie if he was shot in the beginning with his mother
if a ride on lawn mower takes bumps better than your sled, its time to upgrade
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October 26th 2008 at 8:48 PM
[ Modified October 26th 2008 at 8:49 PM
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westman995
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1927 Posts
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Location: St. James, Minnesota, USA
Current Sled: 98 rmk 600 - zx mod
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My fan sled is tons ligher than my liquid sleds. I never noticed it til i owned a liquid sled, fan was all i owned before that. After messing with the liquids and then went to move the fan, that thing didnt weight hardly a damn thing.
They are less maintenance also, prolly a little more reliable. But like said they have quite a bit less power. Quote originally posted by 87srvsnow
o..do they do the job as good as liquid though?
Not really, the liquids have quite an advantage power wise.
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October 26th 2008 at 8:49 PM
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ProXtreme
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Advantages:
** Lighter
** wont overheat in poor snow conditions
** last forever
Disadvantes:
** Less power than liguid
** warm weather is your enemy
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October 26th 2008 at 8:52 PM
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Sno-mo-nut
Just waiting for the snow.
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They do just as good as liquid cooled. Less power but lighter. Less worry if riding in icing conditions, low snow or going at a slower pace as you don't need to kick up snow to cool the sled.
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October 26th 2008 at 8:54 PM
[ Modified October 26th 2008 at 8:54 PM
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87srvsnow
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988 Posts
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oh so fan would be alot better for grass drags than liquid?
Bambi would have been a better and shorter movie if he was shot in the beginning with his mother
if a ride on lawn mower takes bumps better than your sled, its time to upgrade
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October 26th 2008 at 8:56 PM
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westman995
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1927 Posts
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Quote originally posted by 87srvsnow
oh so fan would be alot better for grass drags than liquid?
Well... I believe the fan would not overheat as easily in the summer. BUT then again there is the power difference. If its short grass drags then the liquid would be better, since it wouldnt be running for very long.
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October 26th 2008 at 8:58 PM
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87srvsnow
Average Member
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988 Posts
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oh ok is there any thing i need to worry about with having a fan like could the fan like malfunction or something?
Bambi would have been a better and shorter movie if he was shot in the beginning with his mother
if a ride on lawn mower takes bumps better than your sled, its time to upgrade
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October 26th 2008 at 8:59 PM
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westman995
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Quote originally posted by 87srvsnow
oh ok is there any thing i need to worry about with having a fan like could the fan like malfunction or something?
I dont think so, i have never heard of that. Should be no problems. But as with any sled if you plan on running it in warmer weather for more than one a rip or two across the lawn for fun, you will need to rejet it for the weather.
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October 26th 2008 at 9:01 PM
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87srvsnow
Average Member
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988 Posts
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rejet it? what does that mean? sorry about the dumb questions
Bambi would have been a better and shorter movie if he was shot in the beginning with his mother
if a ride on lawn mower takes bumps better than your sled, its time to upgrade
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October 26th 2008 at 9:07 PM
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westman995
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The jets are inside the bottom of the carbs. They let you change them so you can get the right amount of fuel so you dont burn your sled down from being too lean. And so it dont run rich. The warmer it gets the richer its going to run. The colder it gets the leaner it runs.
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October 26th 2008 at 9:08 PM
[ Modified October 26th 2008 at 9:08 PM
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87srvsnow
Average Member
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988 Posts
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Member Since: October 19th 2008
Location: massachusetts, USA
Current Sled: 1987 yamaha srv
2008-2009 Miles: 26
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oh ok thanks
Bambi would have been a better and shorter movie if he was shot in the beginning with his mother
if a ride on lawn mower takes bumps better than your sled, its time to upgrade
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October 26th 2008 at 9:08 PM
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James007
Disturbing the peace since 1991.
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Quote originally posted by 87srvsnow
rejet it? what does that mean? sorry about the dumb questions
You dont have to be sorry, thats what this forum is about........sometimes  Anyway i am riding a fan cooled sled right now and its my second year, id like to go to liquid because ive had fans my whole life but if you were a starter id say they were perfect. Like westman said theyre like never any maintenace...i drove mine to the ground and it never had any problems withthe engine, the sled has 12000kms on it and still has 125 psi in both cylinders.
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October 26th 2008 at 9:11 PM
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westman995
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1927 Posts
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Member Since: February 22nd 2008
Location: St. James, Minnesota, USA
Current Sled: 98 rmk 600 - zx mod
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I agree, they are great starter sleds. I only had that sled for one year (well i still have it, had it all last year) and it was great, its not totally power-less. Especially if you havent been riding way bigger sleds. It will get you around and you can still have fun on them.
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October 26th 2008 at 9:14 PM
[ Modified October 26th 2008 at 9:17 PM
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from my experiences it is a pain in the ass to get a fan to run well in the summer. and as far as grass drags, dont bother. they are under powerd and rather slow.
In all honesty I dont think I will ever own another fan cooled sled. top speed is usually around 60-70mph, and with the people I ride with its pretty much impossible to keep up with them.
00 xc/rmk... the new frankinsled.
98 xc 700
79' camaro Z28
77' silverado. old trucks are pimp!
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October 26th 2008 at 9:15 PM
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03Pro-X700
Senior Member
03Pro-X700 wants to get rid of my cdi, tach, wiring harness, and old cover. PM if interested.
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dialing in each of your carburators by changing the main jets which control the amount of fuel into the engine(from 60% throttle to 100%). Too much and you run rich, which will make the sled run rough, use more gas, and lose performance. Too little, and your sled will run lean, will have very good perfomance, but eventually burn down. Normally, at least polaris', are jetted 2-3 sizes too rich from the factory to prevent an excess amount of warrenty claims.
For example, my pro-x came with 440 main jets stock. Droping this down to 420 main jets (the proper jetting for this sled with my setup and running at sea level) greatly improved performance, consistancy, fuel milage, ect. Just by rejetting your sled and clutching it lightly, you will notice a night and day different in the way it runs.
2003 pro-x 700;
TracksUSA 144" tip-up rail extensions
1.25 camoplast predator /120 1.40' extreme max SS studs
VanAmburg tunnel extension
SLP Powder-Pro skis, Powder-Coated suspension
Holtzman tempaflow-420 main jets
10-64g weights w/ round almond spring
24/42 gearing, gutted airbox, PERC, torque arm
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October 27th 2008 at 5:37 AM
[ Modified October 27th 2008 at 5:37 AM
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kingofkings
argueing with idiots
kingofkings .
Updated Friday at 6:33 AM
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My Uncle runs a 89 Phazer448 which is a fanner and last year riding, he was keeping up with us. He was doing about 85-90mph. But yea they are super light compared to liquids.
-To ride or not to ride, what a stupid question!
-You should never judge a guy until you have walked a mile in his shoes, then you are a mile away and have his shoes
-Ice, snow, or grass, I'll still kick your ass.
-"And when he gets to Heaven, to St. Peter he will tell, one more soldier reporting Sir I have served my time in Hell"
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October 27th 2008 at 7:39 AM
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ClassicCat76
Vintage Sledhead
ClassicCat76 Sled day!
Updated Yesterday at 2:35 PM
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Is the reason a fan makes less power is because it has to draw power to run the fan?
'76 Pantera 5000 F/C Conversion
MODS to come! Newer sled first!
Dad's Sled: '94 580 EXT dropped two teeth
Old doesn't necessarily mean slow!!
Do what you can with what you got.
Give a man a fish he eats for a day, teach a man to fish he eats for a lifetime.
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October 27th 2008 at 8:01 AM
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MJay
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It makes less power because the tolearnaces are a lot looser on a fan cooled engine. Liquid cooled engines have tight tolerance specs since the liquid can quickly cool down all components. If a fan was as tight as a liquid it would overheat and burn down almost immediatly.
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October 27th 2008 at 8:07 AM
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pudamobile
Small-Bore Fanatic
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Quote originally posted by ClassicCat76
Is the reason a fan makes less power is because it has to draw power to run the fan?
Nope, I'm not sure...someone with more knowledge than myself might chime in and correct me too...but I think the reason liquids perform better is since they have more consistent cooling they can have smaller consistencies in machining...plus when a liquid is cooling well, nothing runs like a well-cooled engine.
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October 27th 2008 at 9:36 AM
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Dill
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Quote originally posted by MJay
It makes less power because the tolearnaces are a lot looser on a fan cooled engine. Liquid cooled engines have tight tolerance specs since the liquid can quickly cool down all components. If a fan was as tight as a liquid it would overheat and burn down almost immediatly.
exactly. Just like with motorcycles, air cooled bikes have much looser specs, since the compontents have to operate in such a wide range of temps. This is why the liquid cooled bikes put out way way more power.
Also look at cars, VW and Porcshe gave up the air cooled cars in order to make more power and less pollution.
That being said I'll be riding an fan cooled sled this winter. I love the weight savings and the simplicity
00 550 super sport
89 Indy Trail
74 Jagtera
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October 27th 2008 at 2:03 PM
[ Modified October 27th 2008 at 2:04 PM
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NoO2Sled
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Yup, what he said....Fanners lose thier power from the inconsistent engine temp. Ideally you want the engine at a specified temp all the time to produce the most power.
Fanners don't have electric fans, they have a direct drive (fanwheel) off the Mag. side of the motor, it basically has a veined wheel that circulates air over the motor, this also robs power.
Although I disagree on the weight thing...I have 2 Poo Sport Touring 440 fanners(2-ups) that weigh in at 485lbs, and my 01 RMK 700 (liquid) weighs 495lbs. 10lb difference and about double the HP's.
I think the big heavy liquid sleds are heavy because the 800+ cc motors and 141"+ length tracks and suspension....but you don't really notice that if it's well balanced and you have power to spare.
Slugging them around in the garage isn't a fair comparison.
2001 RMK 700
2003 600 Mountain Max Deep Snow Special 141
Dual Sport Touring 440 "faners" "Vader and Yeti"
It's never too Deep or too Steep
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October 29th 2008 at 12:48 PM
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rougepolaris
s#^t happens
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how long has Polaris been putting the jets to high and what size jets would i be running in my 600 (I would PM but it won't come up for me)
empty a bag of skittles in the toilet and flush it;s like watching a 5 second nascar race
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October 29th 2008 at 2:48 PM
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MXZfasty02
Junior Member
MXZfasty02 wheres the snow?
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I dont know this but, do you have to worry about getting snow in the fan at all? My buddy melted his indy and the dealer said it was because there was snow in the fan.
My ride: 2002 Skidoo MXZ 600. All Yellow and proud of it.
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SNOWMOBILING: THE ANTI DRUG!
*74mph in 660 foot track= one hell of an adrenaline rush!!
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