shimming stock springs?

[nicolas]

is there any need to shim up a stock spring on a engine with a cam simular to a w100?

it will be used as a daily driver, but not reved over 5000 rpms (hopefully) 

does shimming work with stock springs or is that for the higher tension ones only? and how do i shim springs without special or equipment? or do i need special equipment?

[deano]

Stock springs can live a long life, but once you start hitting the higher rpm, even once or twice, they can quickly loose their tension. Placing a shim on the base is a good idea to tweak the seat pressure just slightly. I have seen new stock spring go away instantly on the dyno, once we ran up in the 5500-6000 range. I know that sounds like a lot of rpm, but in the heat of battle, that can happen instantly, and you might not even notice it....

[youngnstudly]

They can also less the effects of "pounding" from the springs that see high RPM's and have a lot of tension (thus saving your heads). Obviously this is probably not the case with your stock springs, but not a bad idea anyways. BTW just use one shim per spring and check to see if they are labeled "this side up (or down)".