liquid-cooled sleds
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JDXsand00s
- Posts: 259
- Joined: Sun Sep 18, 2005 12:00 am
- Location: Tustin, MI
liquid-cooled sleds
just out of curiosity, how come deere liquid cooled sleds are considered the performance sleds? they all got dual carbs except for the sprintfire, but no regular production fan cooled sled ever got twins. also, in the 76 model year, with basically the same engine, a liquifire has 11 more horsepower. this is rated a 750 rpm higher, but is that where the extra 25% horsepower comes from? i'm guessing that the liquid cooled sleds can dissipate the heat better than fan-cooled so they were designed to run at higher rpm. i also heard that the liquifire 2 was the best handling sled, but what would be the difference from that and the trailfire and sportfires? how come it was the only one to have the full rubber track for 3 years as well, was it to keep the price tag down? i probably didn't explain my question that good but if anyone has some input, i'd love to read. thanks.
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JDXspec
- Posts: 896
- Joined: Thu Jul 21, 2005 12:00 am
- Real Name: Dustin
- Location: SW Minnesota
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liquid-cooled sleds
Liquids were not the only dual carburated sleds, The 295/s and 340/s were both fan cooled and had dual carbs.
Liquid does have better cooling due to the coooling being more even throughout the eng. With fan cooled engs the pto carb must be jetted richer to compensate (much more than a liquid cooled eng) for the higher temps being farther away from the fan.
Hope this helps some.
Liquid does have better cooling due to the coooling being more even throughout the eng. With fan cooled engs the pto carb must be jetted richer to compensate (much more than a liquid cooled eng) for the higher temps being farther away from the fan.
Hope this helps some.
Own 74 295/s, 75 340/S, 800, 76 440 Liquifire, 300, Liquidator (3), 78 440 Liquifire, 340 Liquifire CC, 80 Liquifire, 82 Trailfire LX, 83 Sprintfire 84 Sportfire
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Octane
liquid-cooled sleds
Liquid-cooled engines make more power for several reasons. For one, fan-cooled engines make less power because they must have richer jetting to keep the combustion temps under control. Also, to accomodate the greater expansion inside of a fan-cooled engine, they build the engines with looser tolorances.
All of these reasons result in lower power for fan-cooled engines.
Also, I can think of one fan-cooled engine that had dual carbs: the SportFire.
I recently parted-out an '80 Sportfire that had dual carbs.
All of these reasons result in lower power for fan-cooled engines.
Also, I can think of one fan-cooled engine that had dual carbs: the SportFire.
I recently parted-out an '80 Sportfire that had dual carbs.
liquid-cooled sleds
Octane, the Sportfire you parted must have been modified. They came wil a single carb from Deere.
bob
bob
When in doubt, I'll whip it out. I got me a rock 'n 'roll band. It's a free for all.....The Nuge
Make it three yards m*****f-er and you've got yourself an automobile race...James Taylor
Make it three yards m*****f-er and you've got yourself an automobile race...James Taylor
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ProJd69
liquid-cooled sleds
I Just need to ask this. I have an extra 80 sport motor. Now, if I were to put dual carbs on it ...AS IS (factory motor) what size MIC Carb's and needle & jet size would I need to run at top preformance for trail and everyday running? Also what would I expect out of it, On the + & - side?
Just curious
Just curious