Thread: Supercharger Squeak When Idling
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Old May 18, 2014 | 09:26 PM
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onehundred80
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From: Ontario
Default Re: Supercharger Squeak When Idling
This is a confusing thread. I think a picture might show what pulley it is. Also what material is the pulley? I may have missed this point in the thread. If it is aluminum I would not put it on the car as the rivets come loose all the time.

The gap between the clutch plate and the magnetic clutch is around .012/.016 on the OEM clutch. But they were made with springs that worked, later pulleys did not have true springs and these stretched with use and the clutch plate did not return to the stops when released. This is a weakness of these pulleys and the springs will continue to get worse until the clutch plate is rubbing against the magnet.

What is the point of having springs and stops when nether does its job after a while.

It is explained that the springs will only stretch so far and then remain at a fixed dimension thereafter, if so why were the stops not made long enough to account for this ?
If a spring does not return to a fixed position on a stop after a hundred operations to my thinking it is not a spring. The after market pulleys were built with pre-load on the springs, after a while this pre-load has gone and the spring continues to relax until the clutch plate is under no spring pressure when released by the magnet. If the springs relax at different amounts then just one part of the clutch plate will rub. The gap should be even all around but we saw straight away that this did not occur and it was hard to get an even measurement of the gap.

I have heard of an after market SC pulley coming apart, I am waiting for the first one on this forum.
 
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