Originally Posted by
BLKFIN
Man this sucks to see, sorry about your troubles.
I wonder if there is a round about number of supercharger pulleys sold vs. pulleys that have failed. Obviously there can not be a ZERO failure rate on any mechanical device, but it would be nice to have a guesstimate % of pulleys that have failed.
With that said, I put a scatter shield on the same time as I did my pulley, nice to have a little comfort in the event it does fail.
The answer to that question might be hard to get, no seller would be smart to put those numbers out there.
As the so called spring is not a spring and just a piece of metal that is thick enough to act as a spring for a while, you just have to compare its thickness to the OEM ones to see that. I expect the majority of these springs to fail pretty soon. The fatigue that they suffer will wreck them. Flexing metal slowly weakens it, even actual springs, because actual springs are made from the correct material and heat treated to give the correct properties they will last much longer.
I bet these springs are soft, there is no hint of heat treatment on them.
If the springs in these pulleys were heat treated the magnet would not be able to overcome the force required to bend them because they are so thick. That is assuming that the material is capable of being heat treated to vary its properties.
The scatter shield will save you some money no doubt, let's hope you are not too far away from home when the pulley craps out.