correct way to raise engagement rpm

[maxwell]

knowing little to nothing about clutches (yes the clutching gurus book is on the way) except how they work in some sense and how they mystify me on the other.

What is the proper way to raise engagement RPM?

With Weights, If so where to add weight?

With the Primary Spring?


Thanks

 

[yamaholic22]

you can either increase the preload of the spring by adding shims (only good for a couple hundred rpm), get a spring with more preload force, lighten the heel of the weights (take weight out of the lowest hole), notch the weight so that it has a tendency to "sit in" longer, or get bigger diameter rollers.

 

[maxwell]

what will weight at the tip of the arm do?

 

[jwiedmayer]

Lower top end rpm

 

[snopro]

yeap.
to raise your engagment significantly, you need a stiffer primary spring.
lighter weights will raise top end rpm.

 

[yamaholic22]

lighter weights will raise rpm all the way through, but where the weight is distributed has the greatest effect. The heel (bottom) of the weight controls the bottom end the most, mid weight controls the midrange the most, and the tip controls the top end the most. Could just get a primary spring with a higher initial preload if the top end rpm is ok with the spring that it has now.

 

[MountainMax]

you can also put a ramp or notch in the engagement area of the weight a notched pic attached, and the last way is to tuck under the weights so they center pivot point has changed and it takes more to spring out the cam arm, this can be done by grind some weight off the part of the tip of the ramp where it contacts the clutch housing so it fits down further........All this information is in the AAEN clutch tuning Handbook, it's great..