Looking For Setup - Snowmobile World : Your #1 Snowmobile Forum

phazer500 · 07-02-2005, 03:38 PM

I am struggling with finding the right setup for my 1999 mach z. I am racing 500ft in grass, I just put in a straight 44 helix with red spring set at 24# 26# 28# tried all three. changed ramps to 280s with yellow spring, pin weight started at 20 now is 18grams. clickers at #4, I cannot get the rpms to go over 8000 should I give up on the 280 ramps and just go back to the 286s or 295s.

Krusty · 07-06-2005, 05:12 PM

How many rev's do you want? Stock? What's it running now for times?

phazer500 · 07-06-2005, 07:12 PM

Quote:

Originally posted by Krusty@Jul 6 2005, 05:12 PM
How many rev's do you want? Stock? What's it running now for times?

[snapback]424015[/snapback]

sled runs 8400rpm for max hp which is 164. Onlything done to sled is the port timing is differant.

Krusty · 07-06-2005, 08:32 PM

Yellow is pretty light. try something in the 410 finish range. Red or Black depending on what engagement you want. 280's are fine. Try a heavier spring and add pin to get revs. 54/48 in the back??

97mach1 · 07-07-2005, 10:50 AM

Although I have never tried the 280 ramps, they look very similar to the 145's. They like heavy pins and big springs. I was always told that the big ramps like the 280's, 145's and PX like short distances.

When I had that combo in my 97 Mach 1, I was running 22g on the pins and a 250-460 spring, 44 black ice helix with about 20 lbs preload (basically equal to a 48 degree doo helix). The thing pulled seriously hard out of the hole, it was a great setup for short drag races. It wasn't the best for all around trail riding.

Who's helix is that 44?

A heavier spring will bring those rpms up.

phazer500 · 07-07-2005, 05:12 PM

micro belmont made the helix. I think I'll try the black spring that was in the machine when I purchased the machine.

phazer500 · 07-07-2005, 05:30 PM

Quote:

Originally posted by phazer500@Jul 7 2005, 05:12 PM
micro belmont made the helix.* I think I'll try the black spring that was in the machine when I purchased the machine.

[snapback]424103[/snapback]

does anyone know what the black primary spring is rated at?

phazer500 · 07-07-2005, 05:59 PM

Quote:

Originally posted by phazer500@Jul 7 2005, 05:30 PM
does anyone know what the black primary spring is rated at?

[snapback]424105[/snapback]

I am trying to buy a spring online but I see a lot of them are rated in colors how do I know what to buy, is there a chart or do you have to ask the manufature.

97mach1 · 07-08-2005, 08:29 AM

There's a chart in the race manual, and I think there's one milling around either here or on Dootalk. Actually it's in the Ski-Doo forum here at SW, under "SKIDOO FORUM SPECIAL INFORMATION".

According to my race manual, a black primary spring is 185-410. Definately try that spring and see what it does for you.

A yellow doo spring is 160-270. That would explain your low rpms.

If you're not talking Ski-Doo springs, most other manufacturer's have different color codes, so you just have to compare the start/end lb. loads.

phazer500 · 07-13-2005, 09:00 PM

[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 less belt sqeeze on top with such a stiff spring and 286 ramps? Sled seemed to run the best with 286s.