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Discussion Starter · #1 ·
Hello, Is there a noticable performance gain in having clutch surfaces machined to true them up? How is it done? Tom
 

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Not sure if there would be a noticeable performance gain, but the sheaves would be consistent and more efficiant and help belt wear, racers use to do it to all the old clutches,it must help.
 

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Machine the sheaves and run a Polaris I.Q. 440 belt. Couple of buds have done this with F 6's. Said a noticeable performance gain and longer belt life.
 

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Originally posted by beaster81@Oct 1 2005, 08:44 PM
Machine the sheaves and run a Polaris I.Q. 440 belt. Couple of buds have done this with F 6's. Said a noticeable performance gain and longer belt life.
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:frech32: :frech32: look at his profile, he's referring to ''machining'' the faces of his wildcat clutches, not the f-sled's :drunk:
 

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Discussion Starter · #5 ·
I should have said what I was working with, I have a newer 9 tower on the motor, they seem to be nice and true, but the older secondary is pretty bad with pits and low and high spots, They must have run them the way they were cast back then. Tom
 

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Originally posted by 94wildcat@Oct 1 2005, 11:51 PM
I should have said what I was working with, I have a newer 9 tower on the motor, they seem to be nice and true, but the older secondary is pretty bad with pits and low and high spots, They must have run them the way they were cast back then. Tom
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machine them to a 27* angle(13.5* each), probably around .030'' per halve to true them up, the 9-tower should already have been done from factory,,,,,,,,,, :div20:

(got a killer drag combo for those older bastards, pm if you want it)
 

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Not sure but isn't there a 1 degree taper diff from the new clutch to the old, just remember a buddy saying that his belts didn't seem to last as well. If this makes any difference or not. :dunno:
 

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Originally posted by ready2race@Oct 2 2005, 09:50 AM
Not sure but isn't there a 1 degree taper diff from the new clutch to the old, just remember a buddy saying that his belts didn't seem to last as well. If this makes any difference or not. :dunno:
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still 27*
 

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Discussion Starter · #10 ·
Hi, What kind of machine is used to clean up the clutch? Does it take a special lathe to be able to do the angle? My brother has a nice lathe but it won't do angles, just 90 degrees from chuck. Tom
 

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You would need a lathe with a compound that you could set to your angle and have enough travel, top to bottem. I would think you would also have to take some off the faces so the belt does not ride to low depending how much was took off the angles.
 

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Discussion Starter · #12 ·
I talked to a guy I know that has his own shop, works on rebuilding and setting up race cats, has for many years. He will machine a secondary for me for $40. He said I should pull the track drive shaft and have the drive sprockets touched up in a lathe to true them up also, He said he has seen performance gains from this depending on how out of round they are. Tom
 
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