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Belt life for the boosted

4K views 23 replies 10 participants last post by  bblocher 
#1 ·
I'm running 10psi on my 900 xp4. I seem to be getting about 250 miles per belt (all sand). I've got my clutches dialed in perfect.

I've been doing research on the STM Rage setups. It sounds like they grab well out of the hole and increase top end, but mostly I'm interested in increased belt life. Anybody been in my shoes, switched to Rage 6 or 8, and can give me some real field testing on how much longer their belts are lasting? If you have an Alba gauge, what temps your seeing?
 
#7 ·
STM makes a clutch for high horsepower turbo applications. Bigger belt.

I put a Team wide ratio clutch in my 800 turbo pushing 14 pounds of boost for about 2000 miles now on the same belt. Its wider by about 1'4" than a stock polaris belt but wears like iron.
 
#8 ·
Are you running with the cover on or off?

I ride all Glamis. I had maybe 200 miles on my last belt and replaced it. Honestly if my belts make it 250 miles or 2-4 sand trips I am happy. I have been running the gates belts and haven't had any trouble.

My last trip I ran with my cover off for the first time and it seemed to keep the belt much cooler. I am running 10psi on my xp4 900.
 
#11 ·
Honestly, I never destroyed belt when running turbo on 900, and I run more boost than you, I just replaced them after 600 - 700 miles, because they get narrower compare to new one, but never break them. I was running in line fan to cool the clutch all the time and used only Wasteland belts.
milos
 
#12 ·
Honestly, I never destroyed belt when running turbo on 900, and I run more boost than you, I just replaced them after 600 - 700 miles, because they get narrower compare to new one, but never break them. I was running in line fan to cool the clutch all the time and used only Wasteland belts.

milos

Interesting, starting to sound like the fan may be the key. I'm wanting to run 12 psi but not until I get more out of my belts. Which of their belts did you use? I see strange numbers like 33 and 48 :)
 
#15 ·
I have had zero issues with almost 2,000 boosted miles on one belt in sand and Moab rocks with my 800 two seater. I now have a boosted XP 4 900 with 30" tires. I get about 300 per belt. I am looking at getting an inline blower and the new 2015 cover if I can confirm that it will bolt up to the old XP 900. I messed with a 2015 XP1k and they draw a ton of air from that new inlet and it also gives you a fail safe if the inline fan ever quits on you.

One note on running with no cover in the sand etc. I think there is no problem on the clutches or belt doing this. I have done it a bunch. However I want to avoid ever doing it again. I blew a belt while in the sand in the middle of no where and when it went I was under full boost when the belt went it took my oil return line out for my turbo. It also broke two different wires back there. It was a pain to try to patch together in the sand because I could not find someone to tow me back. I will be running with a cover from now on.
 
#17 ·
#19 ·
A inline blower is a must for all machines period "IMO" the cooler the rubber belt is the better it performs, the increased life by over double or more is a bonus on top of the better performance.. We run with no cover on our Z1 swaps even though we have a bad ass carbon cover

happy riding GB
 
#20 ·
I installed the inline cooler, which brings the temps down on the belt amazingly well. Unfortunately on the second trip out with it installed, I lost another belt.

So I finally got around to really look at the clutches and what I found was pretty amazing. Looking from the back, the primary clutch was 2.5 degrees off from the rear. I shimmed the engine to transmission mounts and got that within .5 degrees now.

Second, and probably worse was that the secondary clutch was out 1/8" from the primary. There were no shims to remove to move it back so I machined that much off the secondary to get it to align. Basically the belt was pressing against one side of the primary hard, with a lot of clearance on the other side.

Now I need some time at the dunes to see how much it helps with belt life, but I can already tell the difference in shifting and idle. Before at idle the belt was dragging so bad that if in gear, it would sometimes slightly move. It was also VERY difficult to shift since it wasn't wanting to fully disengage. Now it shifts better than ever (probably how it was suppose to come from the factory).

I'm probably the only guy to have these clutches so far out of spec from the factory, but if not, hopefully this helps somebody else spend a few less bucks on belts. :ride:
 
#21 ·
I installed the inline cooler, which brings the temps down on the belt amazingly well. Unfortunately on the second trip out with it installed, I lost another belt.



So I finally got around to really look at the clutches and what I found was pretty amazing. Looking from the back, the primary clutch was 2.5 degrees off from the rear. I shimmed the engine to transmission mounts and got that within .5 degrees now.



Second, and probably worse was that the secondary clutch was out 1/8" from the primary. There were no shims to remove to move it back so I machined that much off the secondary to get it to align. Basically the belt was pressing against one side of the primary hard, with a lot of clearance on the other side.



Now I need some time at the dunes to see how much it helps with belt life, but I can already tell the difference in shifting and idle. Before at idle the belt was dragging so bad that if in gear, it would sometimes slightly move. It was also VERY difficult to shift since it wasn't wanting to fully disengage. Now it shifts better than ever (probably how it was suppose to come from the factory).



I'm probably the only guy to have these clutches so far out of spec from the factory, but if not, hopefully this helps somebody else spend a few less bucks on belts. :ride:

Interesting.....I haven't had any belt issues with mine yet but I've only put about 900 trail miles on my 1k4
 
#23 ·
i have a xp900 with mcx ' low boost ' turbo on it
what blower is evryone using ?
have you got them conected to the ignition or manually turn them on or off ?
anyone run one through a turbo timer to let it run on after stopping ?
what about running a bigger scoop out the side for more air ?

trying to get idea's as no-one over here seems to run them

thanks
 
#24 · (Edited)
i have a xp900 with mcx ' low boost ' turbo on it

what blower is evryone using ?

have you got them conected to the ignition or manually turn them on or off ?

anyone run one through a turbo timer to let it run on after stopping ?

what about running a bigger scoop out the side for more air ?



trying to get idea's as no-one over here seems to run them



thanks

It's just a marine bilge blower 3". I have mine connected to ignition as most do. I don't have mine on a timer. I've made it a habit to let it idle a minute before shutdown but that could easily be done. For me, a bigger scoop on the side would just mean catching a lot of sand. The bilge blower is really all you need and most importantly it's cooling just as good when you're not moving.

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