Aftermarket clutch weight testing from this weekend

[Jafo1970]

Shagman told me not to bother with the extra 1/4 in the heel, that due to where the extra weight ends up it doesn't end up doing anything for you.

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It's not much but it allows you to bottom out the 3/4 slug on it so it hangs out on the heel. I know you can get away with locktite on it and still hang it out but it's a little more comfortable an accurate to snug it down on the 1/4" slug. I'm little more biased to heel weight from the start of the turbo Suzuki/cat days. I'm also on a 129" and studded aggressive.

 

[shagman]

It's not much but it allows you to bottom out the 3/4 slug on it so it hangs out on the heel. I know you can get away with locktite on it and still hang it out but it's a little more comfortable an accurate to snug it down on the 1/4" slug. I'm little more biased to heel weight from the start of the turbo Suzuki/cat days. I'm also on a 129" and studded aggressive.

Your correct. In your application of a heavily studded track the extra heel weight will help you. It all depends on traction. Every setup can be tweaked to what a sled and rider need/want. I know on asphalt the extra 1/4” didn’t do anything for me as traction is better than snow and I wasn’t having any belt slipping anyway even though there is full hookup.


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[**sj**]

Jafo - What were your rpms through the range? You might want to just put 2 thick washers added to the tip instead of the 2 thin washers. That will bring you down 300 rpms.

8,800 -8,950 -9200? (stabbing throttle down low to top speed)

might he benefit from going up to the 63gr version?

also...what primary spring jafo and others?

 

[NOS-PRO]

might he benefit from going up to the 63gr version?

also...what primary spring jafo and others?

63 gram weight would give him a little more adjust-ability if he went more hpr, but I think after that....it's probably just used for racing purposes. Think he's good with the 58 gram base and load up the weight.

 

[shagman]

might he benefit from going up to the 63gr version?

also...what primary spring jafo and others?

I’ve ran all the way up to 19.2# boost on 58g weights with still some room to add more. I don’t think you need to make the jump until you get above 300 hp. I was also running a really stiff primary spring.


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[nadekeys]

might he benefit from going up to the 63gr version?

also...what primary spring jafo and others?

I'm using the orange thunder primary spring from the big venom kit.

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[**sj**]

I’ve ran all the way up to 19.2# boost on 58g weights with still some room to add more. I don’t think you need to make the jump until you get above 300 hp. I was also running a really stiff primary spring.


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what if I already have the 63gr base and say a comparable program to jafo? same aggressive studding....was thinking of the black green primary..have the orange tp secondary spring and a 37 degree helix or of course stock helix...

 

[shagman]

what if I already have the 63gr base and say a comparable program to jafo? same aggressive studding....was thinking of the black green primary..have the orange tp secondary spring and a 37 degree helix or of course stock helix...

I’ll look up spring and let you know what I think to start.


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[shagman]

what if I already have the 63gr base and say a comparable program to jafo? same aggressive studding....was thinking of the black green primary..have the orange tp secondary spring and a 37 degree helix or of course stock helix...

Ok. That spring is a little less than the one I’m running. And a heavier base weight. I would start at.
7/16 steel plus thick washer in tip.
3/8 steel in mid.
3/4 alone or 3/4 plus 1/4 set screw in heel.

Wrap the 37* helix at 6-1 and hold on when you come off studder. You should be able to set antilag at 3000-3100 with this setup.


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[**sj**]

Ok. That spring is a little less than the one I’m running. And a heavier base weight. I would start at.
7/16 steel plus thick washer in tip.
3/8 steel in mid.
3/4 alone or 3/4 plus 1/4 set screw in heel.

Wrap the 37* helix at 6-1 and hold on when you come off studder. You should be able to set antilag at 3000-3100 with this setup.


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would 7/16 in tip with two thick be similar to your mid and tip mentioned?

 

[shagman]

would 7/16 in tip with two thick be similar to your mid and tip mentioned?

It will probably pull rpms down a little more. But still might be ok. Part of it is the 37* helix will also pull rpms down on the big end. I tried a 35/39 and didn’t like it. 39 was definitely too steep. I want to try a 33/37.


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[**sj**]

It will probably pull rpms down a little more. But still might be ok. Part of it is the 37* helix will also pull rpms down on the big end. I tried a 35/39 and didn’t like it. 39 was definitely too steep. I want to try a 33/37.


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was this with a btx? could some of that be the gearing and drivers?

 

[shagman]

Stock btx gears makes this better. Higher ratio. Tried it on asphalt also with 27/43 gears. Just not a good combo with our weights.


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[**sj**]

ditch the straight 37* ?

 

[shagman]

ditch the straight 37* ?

No I would try it. If you don’t like it go to the stock one. Now that we can ride we’ll be testing all kinds of stuff.


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