What is the difference between a long and a short rear suspension spring on the same suspension piston???

Question

I have a fully suspended bicycle with a rear suspension with 100mm travel. A couple of days ago I found another suspension on an abandoned bike. I unmounted it and brought it home to see if I could use it. The piston itself is rusty and unusable, however the spring itself from the suspension seems to be fine and is also longer by 1.5cm then the spring on my current bike's suspension. I was wondering whether its worth to therefore to substitute my current short spring on my bikes suspension with the long spring I found, keeping my currents suspension's piston however?

Both springs have the same diameter and measurements (750x38) so technically the spring I found fits on my current piston. I would like to know what the difference would be if I substituted the short spring with the longer one and whether its worth it?

Here's an image of a suspension similar to mine which's spring I'd like to substitute with a longer 1:

http://www.kingbarcelona.com/images/imagecache/240x180_x_fusion.jpg

Answer 1

'diameter and measurements (750x38) ' [quote from your question]

This should mean a 750 lb load 3.8 inch stroke spring.

I suggest keeping your old spring as the new'abandoned' one may be fatigued.

I hope this can be of help to you.

Answer 2

well if you put on the abandened spring it might void the warrenty and it probavly would not be good for the bike