Better clutch Shoes for MT?

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MrMeatHooks

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Hey guys,


So here is the deal.. My clutch seems to be slipping alot, like there is not enough bite from junk shoes, or the motor is driving through it because of the added power over the stock engine that was there before.


The power is just ripping through this thing. I want to know if there are Clutch shoe upgrades for a better bite, like something with more of a metallic composition that bites harder the hotter the clutch gets, like breaks on a car.


When driving the truck it takes longer to catch up to the engine rpm. Before I switched motors the truck would rev out and run out of top end. Now I notice alot more speed and RPM with this motor and pipe combo, having a better clutch should put more power to ground and improve acceleration.


Also, stock gearing.


Any ideas? I cant find anything
 
You might just have a bad clutch. I have never had one slip on me. Not even on the 8hp reed case motor.

I normally snap a dogbone pin before my clutch gives way.
 
the compounds on the friction shoes vary from brand to brand. about the same as brake pads on dirt bikes - slintered metal- organic-inorganic compounds-ect. you no doubt allready know this- some may not. the stock clutch spring on the humble hy engines are 6,000 rpm. some prefer to install a 7,500 spring. the spring on the factory cy-f270 is 8,000. ddm sells good springs- assorted engagement -lock up rpm. all springs -clutch bells- shoes -the engagement -lockup rpm lowers as they are in use- the heat. the 9,500 rpm spring engages @ about 500-800 rpm lower in use- depending on throttle style- weather you are in and out of the clutch all the time- blipping the gas, or are firmly in and out of the clutch. also, some folks reverse the shoes- more solid lock up. this can be rough on the running gear if you constantly blip the throttle.
 
x2. I was wondering what clutch spring you are using too. Higher engagement springs can wear out the shoes faster. At least in the atv cvt clutches which, work the same.
 
On the xb, i use zenoah shoes -not reversed. DDM 9,500 spring. this is with a f-270 engine- a rev monster. good combo on a light car. On a heavy rig with big engine-lots of midrange ?- i would go with the 8,000 rpm spring.- yum- butterball turkey breast slo cooked in a crok pot for 12 hours- sour dough bread-bit o miricle whip- chedder cheese- bowl of tomato soup with lots of crackers- big ol glass of odwalla original super food mixed with 100% cranberry juce-- aaaa.
 
The clutch shoes are stock HY I think with 6k rpm spring. I inspected the shoes, they do not look contaminated etc. It is odd to me, I have never had this issue before lol.
 
yea it is kinda weird. did you recently put in a fresh engine- r-r the engine?- just saying- there could be a mix up between the sides of the shoes that the flat- wavy washers ?- binding? could the clutch center bolt be slipping?- hard to say from the www.- just a guess.
 
+1

If you over tighten the clutch mounting bolts, it restricts them from engaging the bell properly.
 
Yeah I was thinking that it could be binding, checked the bolts and they were good. I can tell the guys at Flow Systems checked it out when they went through the motor. I also free reved the motor a bit whith the clutch bell off, wanted to see if the movement was smooth, it was. I think im going to try better shoes if I can get them. I guess the clutch could need a bit more break in as well.
 
They can glaze up if they get too hot. Sanding the shoes and inside of the bell will help.
 
Yeah I sanded them, no luck. I also made sure they were going the right way etc, all is good.Took it out and ran it hard once since break in and I inspected the clutch.. I think the motor is to much, burnt the clutch up in one 5 minute run.. Here are the pics.. after the smoke show.. Also, to clear any thoughts of other issue..there is no drag any where the truck will coast for days.Also, even the new clutch is burning up, it smells like burning brake pads. The motor is just driving through it.Pictured are both new and old motor, old motor had a few hard runs and looks new still..

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I don't think the motor is the cause. I have a 36, no clutch issues to speak of. It's in a MT also with stock wheels. I don't have one of Flowsystems pipes yet so I know my 36 is under 5hp. I have an OBR 8hp reed motor in another platform. It has even more power, and still no clutch issues even with a 9500 rpm spring. These clutches even see the RCMax 70 and the twin cylinders. That's like 15hp. Don't get me wrong they don't last long with those motors, but they do work. You might just want to try a new clutch. Make sure those spring washers aren't flattened. ;)
 
man, thats a pisser. are the clutch shoes cy-hy-zenoah? just wondering.- what rpm spring you running? i am just thinking out loud here, you think that theres anyway that the engine is not reving hard enough to overcome the spring enough to apply the needed force to the clutch bell? The darned shoes are so black i cannot tell what brand they are.- I bought a set of clutch shoes fron gitzmotors a while back- the bodies of the shoes weighed more than the cy or hy shoes.- the pad materal is diffrent also.- better watch out for the crank seal on the clutch side of the big motor-- seal cooks, you will suck air. just saying---
 
sayy, after reading what r-c dad - he has big power engines- isthere any way that the crank seal may be letting a little fuel tru? any evedence on the inner clutch housing of fuel?
 
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