98' SRX vs F7

Wouldn't a 1.25" track with studs be faster than a speedtrack with the same amount of studs in 660' or 1000' feet from start to finish?? You're not going to reach top speed in that length anyway so it shouldn't matter if it kills a little top end. my .02 cents. You guys know more about it than I do though. ;):D
 

shortstop20 said:
Wouldn't a 1.25" track with studs be faster than a speedtrack with the same amount of studs in 660' or 1000' feet from start to finish?? You're not going to reach top speed in that length anyway so it shouldn't matter if it kills a little top end. my .02 cents. You guys know more about it than I do though. ;):D
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the speed track will be MUCH faster in either of those distances, I'm gonna go out on a limb and say 0.4-0.5s quicker to 660, to 1000'... I don't even know... gone.

that's assuming the speed track is studded properly and you're racing on a surface other than virgin powder.
 
I beleive the F7 is bone stock, there will also be a 700 Ultra there but I don't I'll have to worry too much about him.
When I bought my 98' SRX it had the 1.25 inch track on it and I just left it on as except for the odd race most of our riding is in fresh snow as we get lots of it here and anything smaller than the 1.25 for normal riding wouldn't be feasible.
I have a smaller track sprocket [to alow room for the 1.25 track] and it's also geared down so top speed is 105 mph on my GPS. Shift rpms start 8300 then go up and stay at 8500 till I hit top speed.
 
the weight issue is right at 1000 rpm 1 lb = 7lbs,it gets worse as rpms increase science has proved this.for every 100lbs of weight you will lose .10 off your et. rotating mass is a killer for speed again science proves it.track spin on the start line is a issue spin = no go.other things to cosider track tension,belt hardness soft belts grab better but blow up sooner run a 8ch over the 8dn softer compound,platic backers verse metal,again a weight issue,engine alignment,and other things figured out through research and trial and error any form of resistance will slow you down as well as your suspension not being set up for the riders weight etc
 
Junior said:
the speed track will be MUCH faster in either of those distances, I'm gonna go out on a limb and say 0.4-0.5s quicker to 660, to 1000'... I don't even know... gone.

that's assuming the speed track is studded properly and you're racing on a surface other than virgin powder.
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Wow, I didn't figure that they would be any quicker, let alone 1/2 second. Like I said, you guys know way more than I do so I'll have to take your word for it. ;)! I guess I did learn something today. :WayCool:

:rocks:
 
shortstop20 said:
Wow, I didn't figure that they would be any quicker, let alone 1/2 second. Like I said, you guys know way more than I do so I'll have to take your word for it. ;)! I guess I did learn something today. :WayCool:

:rocks:
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much much faster, hardly comparable man, but shaving 10lbs of rotating mass from the largest rolling circumference on the sled will do that, not to even begin on the difference in pumping loss.
 
Well we had our race day on Sunday. There were two 05' F7's, Ski Doo Rev 800, XC 700, 03' RX1, an Appex , my brother's 05' RX1 and a bunch of other sleds but these were the faster of the bunch.
Here are the results, slowest to fastest:

7th place:...XC700
6th:...........03' RX1
5th:...........F7
4th:...........Rev 800 [engine died on 3rd run]
3rd:...........F7
2nd............Appex
1st [tie]......05' RX1 and my SRX

The Appex could have been another tie for first but he was a bit slow off the start, I'd pull 1/2 a length on him on take off, then it would stay that way to the finish line. We tried racing for 1000ft but the results were the same. The 3rd place F7 would be about 3 lengths behind at 1000ft.
Thanks for everyones help!! ;)!
 
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