Better clutch Shoes for MT?

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No fuel charge getting in from the crank seal, and the motor turns way more then enough to engage the shoes totally. Being that the spring is a 6k rpm, there should be no issue with centrifugal force holding the shoes open. I have another HY clutch set in and it is working, can still smell the shoes burning up when I run it hard. What about hpi shoes?
 
I also put my side mount pipe back on, this helped the low end, but the high end suffers bad over the pipe I made for it. This could mean something, at least proves my pipe makes more mid and top end power, but not enough low end to get the clutch shoes engaged.. Way more top end with my pipe over the jetpro, even though the jetpro is a professionally made pipe, it is obvious because of how fast and hard my truck hits when full throttled. I guess lower gearing would be a better option for my rpm pipe then stock gearing. Any ideas RCDAD?
 
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If you saw the enormous size of the Flowsystem pipe, you wouldn't think the jetpro would work. The expansion chamber is over twice the size of the Jetpros. It also is an end-bleed with a larger diameter stinger. My plan is to get my Jetpro to Eric and see if it can be modified to work. If it won't I will have him make a Flowsystem pipe for my MT. He did a lot of trial and error testing to get the 36 to rev. On his pipe he can get the 36 over 18k rpm. I think in stock formation the 36 was only revving to 12k. It's amazing what porting and a matched pipe will do.
 
I can agree to that. I prefer my home made pipe over the jetpro I'm running now, but toasting clutches and poor low end are obsticles that need fixing. I'll get a belt drive and fiddle around with it to see if i can correct the issues I'm having. Man you should of seen it, smoke everywhere when the clutch was going, the motor was not having it lol.
 
That should not be happening with the clutch. Something isn't right. Just thinking out loud. I'm a bit stumped... What you are describing sounds like failure to engage fully. You ruled that out. Alfred mentioned oil leaking. That also would cause it not to hook up. You stated completely dry. I need to think on it some more...
 
Motakitty said:
What happens if you put the clutch shoes on backwords
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That would be worth a try. That causes the clutch to engage quicker and harder. Normally not a good idea with huge MT tires. In this case just to see if it would hook up.
 
Yeah, as a Certified Brake guy I have sanded pads before, usually only after the rotors were turned to allow for proper break in. That was the first thing I did to the clutch shoes, however it did not help.

I was thinking of reversing them, I know this clutch works in a similar fashion as a Self energizing drum brake system on a car. When you apply the brakes, the shoes will grab and rock forward causing the shoes to energize and grab harder with little to no effort from the hydraulic system therafter. I am assuming that, having the friction material on the shoe backing plate offset has some benefit into helping the shoe lock once the centrifugal force is met..

When looking at the shoes and having them flipped, I would think they would bite harder due to the fact that the friction material is closer to the leading edge of the backing plate, this would engage the clutch quicker, but on the same note wear the clutch quicker. If you install Self Energizing shoes backwards on a car, they will lock prematurely, so this same theory should work on the centrifugal clutch.

Oh yeah, clutch bell looks great still, no grooves or discoloration.
 
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i wouldn't see why you'd sand the shoes. maybe the bell as it's a different material, steel (supposedly). i haven't looked at the shoes on my trucks but i am very familiar w/cvt type clutches on belt drive atv's. i could tune an atv clutch good by feel. this is why i prefer stock engagement springs over higher engagement ones. but that's another topic lol. anyways, i'mnot questioning your abilities bro. i just wouldn't sand the shoes. try sanding the bell (the drum the shoes grab) & make it have a slightly rougher surface. i have friends that mud raced atv's & they did this on high torque engines.
 
I should of clarified, I sanded both surfaces, both were glazed over. The problem is that once the shoes glaze, they are junk. Its like they turn to glass and get brittle.
 
The motor is wicked. I will just buy stock in the clutch company so I can get free replacements everytime I drive the truck lol
 
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