Shifting Out? - Snowmobile World : Your #1 Snowmobile Forum

phazer500 · 07-08-2005, 04:59 PM

If I use a marker on the primary clutch to see if sled is shifting all the way out in 500ft how much of the mark should be left.

I did this test and there is a mark 3/4" long left? Sound right?

01MachZ · 07-11-2005, 04:30 PM

Is this the primary on your 99 mach? I will have my clutch apart in the next week or so and I will measure what is actual max top distance you can achieve.

phazer500 · 07-12-2005, 06:23 PM

Quote:

Originally posted by 01MachZ@Jul 11 2005, 04:30 PM
Is this the primary on your 99 mach? I will have my clutch apart in the next week or so and I will measure what is actual max top distance you can achieve.

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Ya it's on my 99 mach, let me know. Thanks

97mach1 · 07-13-2005, 08:00 AM

If you're shifting all the way out, there will be no mark left at all on the clutch sheaves.

With 3/4" mark left, you can still gear down quite a bit to get more acceleration, at least if traction isn't an issue yet.

What gears are you running?

phazer500 · 07-13-2005, 04:28 PM

Quote:

Originally posted by 97mach1@Jul 13 2005, 08:00 AM
If you're shifting all the way out, there will be no mark left at all on the clutch sheaves.

With 3/4" mark left, you can still gear down quite a bit to get more acceleration, at least if traction isn't an issue yet.

What gears are you running?

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I am running 22/43 dont think i should go down anymore. I'm getting ready to do some more clutch work right now maybe that will help

phazer500 · 07-13-2005, 08:59 PM

Quote:

Originally posted by phazer500@Jul 13 2005, 04:28 PM
I am running 22/43 dont think i should go down anymore. I'm getting ready to do some more clutch work right now maybe that will help

[snapback]424500[/snapback]

Alright this is what I did, I ordered a big spring 250/465 put 280 ramps in with 20 grams of pin weight 44 helix@24lbs. I could not get over 8000 rpms did 2 passes @500ft. So I went back to stock helix 50/47@ 24lbs, sled seemed to pull a little harder out of the hole but still cant get sled over 8000 rps also 2 passes.
So I went back into the garage and took the 280s out and put the 286s in. The sled came alive. For some reason I cannot get the 280s + rps to work with this sled? What I was wondering with this 465lb spring will there be less belt sqeeze on top with such a stiff spring and 286 ramps? Sled seemed to run the best with 286s.

MyDoo · 07-13-2005, 09:54 PM

Gear it down untill the et falls of then come back up that is the best way to get max out of it

BCDan · 08-30-2005, 12:04 AM

Most manufacturers gear for about 10 mph faster than the sled can go to keep the belt away from overdrive. They find that the maximum speed is actually achieved near 1:1 instead of in overdrive because a loss of efficiency occurs with the faster belt speed that occurs in OD.

If your sled is geared 10 mph faster than it has HP to go, the belt will NEVER make it to full shift, nor will you want it to. You may change gears to get it to fully shift and find you lose top end.

01MachZ · 08-30-2005, 12:24 AM

286 ramps, 19,4 grams of weight, wait till I am sober... HAHAHA I will fill in the rest.. LOL

nhsnopro · 08-30-2005, 06:22 AM

Quote:

Originally posted by 97mach1@Jul 13 2005, 10:07 AM
If you're shifting all the way out, there will be no mark left at all on the clutch sheaves.

With 3/4" mark left, you can still gear down quite a bit to get more acceleration, at least if traction isn't an issue yet.

What gears are you running?

[snapback]424424[/snapback]

OK, I can learn something here. What did you mean by "if traction isn't an issue yet"? Will he lose traction (spin the track on holeshot) if he gears down too far? And can you define gearing down (faster or slower on far end). Thanks.