top speed at the radar runs - HCS Snowmobile Forums

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Old 02-07-2012, 03:32 AM   #1 (permalink)
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Ran my sled at the radar runs this past weakend. 1000' 94.4 was my fastest time with 64g wieghts almond round silver/blue with a 52-38x. I got 94mph with the same setup but with 62g wieghts. I got 5th out of 7 sleds those damn f7's are running 98-104mph
Is it possible to beat those f7's with my stock xc7? I'm going again this weakend its another 1000' track. Jw if it would be worth a MPH to strap my suspension down? I did run old carbides and sprayed some Pam on my sliders and jetted down a few sizes to 185/185. Any other pointers would be greatly appreciated, if I didn't have the mechanical reverse I'd try some gearing but its quite a job to get the cover off that chaincase. Another ? I had if I were to take my front outside boggies off would that make any difference? I noticed all the modded sled don't have any boggie wheels on the outside, must be a reason.
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Old 02-07-2012, 10:00 AM   #2 (permalink)
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I doubt you will beat an F-7, many good guys on here with lots of knowledge for clutching, for 1000' you can pick up some with a gear change, good luck!
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Old 02-07-2012, 10:12 AM   #3 (permalink)
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We were up behind Shawn Burke's this weekend and my buddies edge x 700 was beating up on f7 all day.he was even taking out a rather fast e-tec800 as well. All in the setup. His sled was strapped down and we were only running 660' but for some reason his 02 is a runner. Its got a can vforce3 reeds gutted air box and 144 1.675 grand masters with 48 assassins same length down the outside. He was also running a yellow primary spring,64 gram weights . Not sure what's in the secondary but the sled is very fast.
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Old 02-07-2012, 10:24 AM   #4 (permalink)
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a VES 700 with 192 studs, geared for a short 660 run can do well in the right hands, clearly he was set up for the event. OP dosent post alot of info on his sled but its non valved and I'm guessing not studded up like sled you mention, and its also got reverse ( have you seen the inside of one of those chain cases!! yikes), he's not going to beat an F-7 without some major time and talent and $ invested. just my .02 cents
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Old 02-07-2012, 10:36 AM   #5 (permalink)
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You will have a tuff time beating F7's with a stock 99 700. Most F7's aren't ever 100% stock anyhow, seems everyone has, fuel reducers on them, pipe mods, timing keys, y-pipes, hot boxes, ect....
If you get your 99 dialed in good it will probably beat the average trail F7. 185 jets are usually way rich for 1000ft speed runs.
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Old 02-07-2012, 10:41 AM   #6 (permalink)
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It all comes down to the quality of competition at these events. My buddy use to clean house at many of these informal races with his 00 600 xc sp from the fact tech and rules were pretty lose. Lots of guys running were pretty clueless on a sleds set up to do speed runs. Go to a sanctioned event and different outcome.
Getting back to the question if an xc7 can beat an f7....not likely if all is equal. The f7 makes more hp and has a chassis more suited to drag and speed runs.
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Old 02-07-2012, 11:11 AM   #7 (permalink)
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what hole are you running the secondary spring in? The initial 52 degree sounds fairly steep. You could try something like a Dalton 50/36 full progressive and get a few springs (EPI Purple, EPI Orange) and play with it. If you can run the spring in hole #2
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Old 02-07-2012, 09:06 PM   #8 (permalink)
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Hot trail setup isn't necessarily the best top end speed setup. Less starting rate on primary, shallower helix and softer spring to get it to shift out faster and let the torque of that motor pull it. 185/190 is stock jetting for them.
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Old 02-08-2012, 12:56 PM   #9 (permalink)
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Originally Posted by wataskia2000 View Post
what hole are you running the secondary spring in? The initial 52 degree sounds fairly steep. You could try something like a Dalton 50/36 full progressive and get a few springs (EPI Purple, EPI Orange) and play with it. If you can run the spring in hole #2
I actually tried holes 3-1 and hole 2 got me the 94.4 I also tried my 36x hole two but the 52-38x worked the best. I've been keeping my eyes open for a full progressive 50-36 no luck yet. The 36x seemed like it paused for a plot second, hard to explain.
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Old 02-08-2012, 01:08 PM   #10 (permalink)
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Originally Posted by shimyxc View Post
a VES 700 with 192 studs, geared for a short 660 run can do well in the right hands, clearly he was set up for the event. OP dosent post alot of info on his sled but its non valved and I'm guessing not studded up like sled you mention, and its also got reverse ( have you seen the inside of one of those chain cases!! yikes), he's not going to beat an F-7 without some major time and talent and $ invested. just my .02 cents
Haha ya these chain cases are scary and a major pain The ass to work on,
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