Using Noram Stinger in 390 lb class. With peak torque at 3500 rpm, having difficulty setting and maintaining engagement at or close to 3500 rpm. Current engagement rpm using black springs is much closer to 4000. Has anyone encountered the same issue? Anyone have any experience using the orange springs? Or is their additional internal friction delaying engagement?
Clutch engagement
- Thread starter JPM
- Start date
Jimbo
You can fool some of the people some of the time
In my opinion 4000 rpm is too high.
Like JJChat suggested 3600 is more appropriate.
If your shoes are worn that could be your problem.
The gap between the shoes and the drum is important.
The gap between the shoes and the drum on a new Stinger .085"
Like JJChat suggested 3600 is more appropriate.
If your shoes are worn that could be your problem.
The gap between the shoes and the drum is important.
The gap between the shoes and the drum on a new Stinger .085"
Last edited:
racinnut15xm
Member
https://4cycle.com/karting/threads/shoe-clutches-question.103964/ this is another good one, its not aimed directly at the stinger but it explains the differences in lock up on the noram chart vs what you see or think you see in the real world.
Gap is .080 using calipers
Last used installed new shoes and new black springs just to eliminate those two variables. No contaminates (ex. bearing lubricant) drum looks normal, but have blueish hot spots on shoe contact areas. Easily removed with light sanding. No signs of shoes dragging on side plate. The challange as i see it is to solve this dilemma instead of switching clutch manufacturers. This clutch seams to work properly for the many who use it....???
