Front Spring Information

[Bad_S55]

This is probably something that's been gone over at least a dozen times, but the info is so scattered. What I need to know is the stock spring rate, free height, and tag for the Marauder's front springs. Likewise with the Eibach springs, rate & height. Thanks all & happy St. Patrick's Day!

[lifespeed]

I believe the stock rate is 325 lbs/in, but you may want to be a bit more careful than taking my word for it. You can pull your stock spring off and have it measured by the spring manufacturer, keeping in mind that it will have less spring rate than stock due to fatigue. You can calculate free height vs installed height based on the motion ratio of the front control arm and the weight on the front wheel. This should agree pretty closely with your example spring except for age.

As far as beefing up the spring rate, you really can't do that much without wrecking the ride quality unless you are willing to upgrade to custom shocks. The spring and shock have to work together. If you are sticking with a factory type of shock like KYB you have to match the spring to it, which means very little increase in spring rate or the shock will be underdamped for the spring. Which means a bad ride without the handling improvement you were after.