MTX, Lightening, or Polaris weight comparison

[RMOD800]

I am in the process of finding out if anyone knows the relationship concerning the three different styles of weights. I understand that there is probably different profiles, etc., but in general, if a sled uses polaris 60's what lightening or mtx weight would provide the comparable performance? Also, if you know the relationship between belly busters, please chime in. Thanks in advance.

 

[sled_guy]

Lightening are typically 2-3 grams heavier than the comparable stock 10 series weight. The Lightening carries it's weight earlier in the profile, loads the motor harder on the bottom end. Because of this, you have to team it with a shallower initial angle on the helix.

So if you take an 800 Polaris for example and run 62 or 63 gram lightening weights you'll run like a 48 degree initial angle helix. Anything more than that at altitude and you'll have a hard time pulling it.

But put 10-60s in and you can through a 64 initial angle at it just fine.

The belly busters I have used, only in D8s, have been the same weight as the 10 series I was using. The difference was a better pull through the midrange. I used the same helix with both the belly busters and the 10 series.

sled_guy

 

[RMOD800]

Thanks sled guy,

Good info. Wasn't sure if anyone new what I was asking! Not everyone has had the experience tuning clutches with so many variables.

 

[winter brew]

I used all those and I kept going back to the 10- arms, just a good overall design for most twins.

 

[IDAHO HOT SHOT]

We spent most of last thursday testing clutch setups. 09 d8 163 slp single and 09 d8 155 camo 2.5 slp twins. We tried MTX 68 empty on both sleds. We tried 62 stock, and we tried 62 BB. We tried stock secondary clutching and a 58/38 helix. the best combo on both sleds was the 62 BB with the 58/38 helix. The track speed was 2-3 MPH better and the R's were held even when the suspension was compressed while at full throttle. Im a pretty die-hard SLP fan, but the belly busters seemed to work a little better.

 

[F-Bomb]

Same here on the belly busters but we use a bit steeper helix and a different spring combo with excellent results. Don't know if its the ultimate because who has the money and time to try everything in every combo. Best bet is to find someone who has your application in similar arenas and just get what they have. Once you are close then you can do the little changes for fine tuning your own system.

 

[akrevrider]

Big *Torque Weights

Take a look at Ron's BT weights that he fabs up from stock Polaris weights to suit your riding conditions & sled. He is on the forums and has received great feedback on the results from those of us with the 800CFI.

 

[RMOD800]

Thanks everyone,

I have been running 60 and 58 Bellys and am thinking of running lightening weights to see if there is a difference. I am having an issue with my 08d8 not turning the r's that I am looking for. What's interesting, is i tried both of the weights above at the same elevation and it didn't change my r's at all. I am in the process of trying to figure that out!! Maybe a change of helix and gearing.

 

[RMOD800]

What does Ron's weights consist of? By the way, what elevation are you guys riding? Thanks for all the reply's. This makes it easier deciding on the potential setups.

 

[800poodragon]

I am running a Carls helix and was using Belly buster weights. Went to Rons weights and cannot believe the difference in torque...sled is just a small bit lower in RPM's but the torgue improvement was just awesome. the sled is now just an animal. Last year ued 60 gram bellybusters in Cooke City and they worked well...this year they seemed to light and put Rons weights I was using and 6000' and it pulled them great. have now gone to a couple grams heavier than that ak the ususal 6000 to 7000' riding and they pull even better. The sled seems to be a torque monster o to speak....put a guy from a stock 09 800 163 dragon on it a week ao and he could not believe the difference in sleds...was a whole different sled and pulled awesome.I love the way Rons approach on these weights works.

 

[beeler]

Weights

Over the years i have tried both stock and ligthening. Everything from 600-800 sleds. I have found the stock weights the best. Tri-City here in Utah swears by the ligthening. I just bought a 600 RMK that has ligthening. I have only ridden it a few times but it seems to work great. Tri-City set it up and they test everything. There are so many combos that it will be hard to tell which is best unless you spend a month and some cash to tinker.