Clutching on the cheap

[Alsim]

Hi!
Report of my last trial today with 4.5 in the tip, 3.6 in middle wrap at 6-1 Dalton 45/39 and 4 shims .
I Hit the rev limiter (9281) speed was 93 mph in about 1500 ' . It's seems lot a spin at hole shot. I prefered 3-3 wrap. Next try I will remove 2 shims and 3-3 wrap and I think I will be on the spot !

I tested this set up saturday . I raced one mack z 1000 and one z1 turbo. I had amazing hole shot with about 4 length on each sled but they catched me at about 1500 feets. I reached 85 mph on loose snow and belt did 1/4 inches near the top of the clutch

 

[Alsim]

I tested this set up saturday . I raced one mack z 1000 and one z1 turbo. I had amazing hole shot with about 4 length on each sled but they catched me at about 1500 feets. I reached 85 mph on loose snow and belt did 1/4 inches near the top of the clutch

I need to full my clutch for more mph after 1000 feets . May be I will remove one shim to have more grab on belt

 

[Alsim]

http://media.anjou-connectique.com/...5/b/o/bobine-fil-brasure-etain-cuivre2502.jpg

Or 1 -2 grams in the tip with this stuff

 

[NOS-PRO]

I tested this set up saturday . I raced one mack z 1000 and one z1 turbo. I had amazing hole shot with about 4 length on each sled but they catched me at about 1500 feets. I reached 85 mph on loose snow and belt did 1/4 inches near the top of the clutch

Your getting close Alsim!

Nice to hear about the holeshots!!!

 

[Alsim]

Thanks Terry !
If I want to keep my holeshots and increase my top speed, do I have to remove 1 shim or increase weight in the tip? The belt stop at 1/4 of the top primary and the rpm is near 9160

 

[Sam Zuehlke]

Has anyone tried 8fa weights in the COTC . If so what were they loaded with? Had a friend give them to me to try on the viper.

 

[stingray719]

I need to full my clutch for more mph after 1000 feets . May be I will remove one shim to have more grab on belt

Less shims hurt low and midrange but usually help top.

 

[stingray719]

Has anyone tried 8fa weights in the COTC . If so what were they loaded with? Had a friend give them to me to try on the viper.

Clamping profile looks like the 8FS I would say try them and let us know. But at 64 grams and only two holes for rivets you might have to put 4.5 in tip and 3.6 in base.

 

[Sam Zuehlke]

I will try them with that rivit setup and report back to you guys. Thank you for all your help.

 

[Sam Zuehlke]

A quick question that I forgot before I posted. Has anyone tried different rollers? He also gave me 15.6 rollers. What does stock clutch come with?

 

[stingray719]

A quick question that I forgot before I posted. Has anyone tried different rollers? He also gave me 15.6 rollers. What does stock clutch come with?

Rollers change the belt clamping force, and a few other things. I would go with the weights first as rollers would skew the results you are looking for.

 

[NOS-PRO]

Thanks Terry !
If I want to keep my holeshots and increase my top speed, do I have to remove 1 shim or increase weight in the tip? The belt stop at 1/4 of the top primary and the rpm is near 9160

I would look at adding weight to the tip....try to find a happy -medium.

 

[stingray719]

I would look at adding weight to the tip....try to find a happy -medium.

x2

 

[Alsim]

I would look at adding weight to the tip....try to find a happy -medium.

.5 gr on each weight will decrease 1500 rpm right ?

 

[stingray719]

.5 gr on each weight will decrease 1500 rpm right ?

No, it is roughly 1 gram for each 200 RPM. So putting a 1 gram weight in all 3 weights should lower you approximately 200 RPM. That is just a rule of thumb though and not an exact science.