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Aluminum Clutches

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Ryhton

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Ok guys here is the deal I have a WS7 11 in my Ofna PBS, I have tried a few different types of clutches but seem to take them out in a day of running. They break out by the mount hole. I was thinking of going with aluminum, so has anyone used them, and if so how did they work out.

Thanks
 
I have only ever run the normal shoes (dont know what they are made of) I have a set of alum shows sitting in my tool box but I'm not sure what affect they would have. Some have said you get a bunch of alum dust all over the place. Some have said theres a performance upgrade, some otheres have said theres a performance DEgrade. SO i dont know. Right now all my rides are running fine with the regular shoes so I'm hesitant to change it.

I guess the bigger question is.... why do YOUR shoes keep breaking at the hing? Do you have any pics? I know I was having binding issies that caused the hole to enlarge a bit but that was because the shoes were too close together for some reason. I had to shave a bit off the rounded portion to allow for the free movement of the shoes so they wouldnt bind.

I would install the shoes without springs and check their movement. The shoes should be able to move away from the nut a good amount. At least 45 degrees without binding on the other shoes.
 
Thanks for the input robriguez, I will get a pick and post it as soon as I get home tonight. It is a strange problem and everything looks ok when they are installed but then I could be missing something. I will just have to widen my learning curve on this.
 
Ok as per robriguez's request here is a pick of my blown clutch, they always blow out the pivot holes.


4375P1010007edit-med.JPG



Any suggestions would be great.

Thanks
 
Do you replace the springs with the new clutch?
Are you replacing all 3 shoes when this happens?
Just questions to raise thoughts. Never had this problem myself, but it is an interesting one.
 
Originally posted by Hypedonrc
Do you replace the springs with the new clutch?
Are you replacing all 3 shoes when this happens?
Just questions to raise thoughts. Never had this problem myself, but it is an interesting one.
Click to expand...



All springs and clutchs are new, and by the end of the day the clutch is toast.
 
Maybe it has something to do with the flywheel, or the clutch bell. Like I said thats a new one to me. Hopefully someone will have an answer, but of the two newest options I'd say the flywheel over the clucth bell. Did you change anything befor this started happening?Need some clues. Just a theree but how old is your engine? Posible it has slop in the front bearing causing the crankshaft/clutch and flywheel assembly to be out of ballance?
 
Originally posted by Hypedonrc
Maybe it has something to do with the flywheel, or the clutch bell. Like I said thats a new one to me. Hopefully someone will have an answer, but of the two newest options I'd say the flywheel over the clucth bell. Did you change anything befor this started happening?Need some clues. Just a theree but how old is your engine? Posible it has slop in the front bearing causing the crankshaft/clutch and flywheel assembly to be out of ballance?
Click to expand...


The motor is a few weeks old and has a gal of fuel thru it. the flywheel was new and this is the second one the first one was a 4 shoe clutch.
 
Got me. I was just running thru some ideas. If anything else comes to mind I'll post it. Good luck
 
looks like the pins on the flywheel are too small.. the clutch shoes should fit tight around the flywheel.. with the power of that motor.. it will sling those shoes.. i reccommend getting some 1.1 springs.. and dont drill the shoes..

Also.. use the ofna Brand shoes.. in the blue package.. they are the ones i use.. and never have that problem..

Aluminum shoes.. will give great punch.. but you will go through clutch bearings.. cuz of the heat.. and alot of maintenence in the aluminum.. i rather the composite..
 
What kind of maintenance for aluminum? I don't know much about aluminum shoes either... but it seems that they are being used more and more often. Sounds liek they wouldn't wear out early as fast... that would be an awesome bonus to them if you ask me. Aluminum dust? You should see all of the black crap from the soft shoes that are on my car right now... your gona get dust from anything, but man, aluminum dust would be better than what is all over mine, trust me.
 
Originally posted by dgrobe2112
looks like the pins on the flywheel are too small.. the clutch shoes should fit tight around the flywheel.. with the power of that motor.. it will sling those shoes.. i reccommend getting some 1.1 springs.. and dont drill the shoes..

Also.. use the ofna Brand shoes.. in the blue package.. they are the ones i use.. and never have that problem..

Aluminum shoes.. will give great punch.. but you will go through clutch bearings.. cuz of the heat.. and alot of maintenence in the aluminum.. i rather the composite..
Click to expand...


I will take a look at the ofna blue package shoes (do you have a part #). As for the pins, everything fits snug when new, the stretching of the holes is what is happenning when it is ran and one will stretch so much that it breaks. I have a set of 1.1 springs in my other WS7 11 motor but have not run it yet, this weekend it will run.
 
i run the 1.1's on my WS7II and have no problems with them breaking.. however.. i run a kyosho flywheel.. dont run ofna.. i dont know why they would stretch that bad..

The maintenence stuff I'm talkin about.. is mainly.. they get hot.. and in order to have the same punch as when they were new.. you gotta go resurface the clutchbell inside.. i like the composite.. the aluminum are nice.. just went through clutch bearings pretty quick.. with them
 
I run ally shoes, clutch bearings are still good, but I probably don't drive anywhere near as much as some of you guys.

They work really well just when they're cleaned up, but as they wear, they develop burs around the contact patch, like they mushroom slightly, so every so often you have to pull em out and clean that build up off.

The more often you do it the better they perform, it's as simple as that. I am lazy so I only clean them up whenever I see a noticeable drop in performance, but yeah i am quite a happy chappy all up with the aluminium shoes.

If I ever end up hating them, i'll give mugen white or kyosho black composite shoes a try instead.
 
Judging be the tripple clutch that I have in my K3 it looks like the shoes you are using are too big. The length of the shoes I am using are about 2 - 3mm shorter.
 
I run nylon, but those for sure are not them. Get some good shoes man those are soft like Charman
 
Thanks for the input guys I am going to try a mugen white clutch with 1.1 springs this weekend and see what happens.
 
Hmmm just a thought but is there anything wrong with the flywheel like is it straight??? I could see a situation of the flywheel wobbling one way or another either due to crankshaft out of balance or the flywheel itself. Do you have another flywheel you could try out???
 
newnitrofan I have tried a different flywheel and the same thing happend. I am putting on the mugen white shoes with 1.1 springs. I am also going to put on my new 14 t clutch bell and see what happens on Sat if the rain stays away. Thanks for the input it is a strange problem.
 

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