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Originally Posted by 1972C10
You can heat leafs BTW ive seen it done where they were heated behind the pack and they kinda folded up but still had travel.
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Springs are made out of what is called "spring steel." It is a specialized metal that is particularly good at retaining 'memory' of its intended shape. This is why it works well as a... spring.
Heating steel changes its molecular identity, and so heating spring steel does the same. If heated incorrectly (that is, without specialized equipment and/or knowledge), you get bad springs. Sure you can heat leafs. But if you heat them incorrectly they have the potential to break at the heat point. That is because they will no longer be springy at that point but they will still be asked by the suspension to move back and forth. Bend a piece of steel back and forth enough times and it breaks.