rear springs 13 vs 16

**dazed and confused** · 07-17-2012, 08:50 PM

i run 250lb 13 inch lr with a lot of spacers to get my numbers so i put a 16 200 and saw really no diff
what the diff from a shorter spring stacked up or really tall with preload from the wght of the car

**cheaterleaddog** · 07-17-2012, 11:49 PM

If you set it back to ride height it really should weigh the same.

**dazed and confused** · 07-18-2012, 08:03 PM

yeh i wanted to raise the ride hgt reason for the taller spring bur it only went up a little so i was wondering on length affects on springs

**cheaterleaddog** · 07-18-2012, 11:15 PM

Originally Posted by dazed and confused

yeh i wanted to raise the ride hgt reason for the taller spring bur it only went up a little so i was wondering on length affects on springs

I bet you have a 1300 # right front

**dazed and confused** · 07-19-2012, 09:08 AM

Originally Posted by cheaterleaddog

I bet you have a 1300 # right front

???????????? lf 900 rf 850

**MasterSbilt_Racer** · 07-19-2012, 05:50 PM

Different lengths mean no difference but weight of the spring unless one is too short that it coil binds during operation.

**ToddSmith16** · 07-19-2012, 06:11 PM

13 should work just fine if you run 9.5 in fronts.

**cheaterleaddog** · 07-19-2012, 07:03 PM

Originally Posted by dazed and confused

???????????? lf 900 rf 850

Now im dazed and confused.

**tck** · 07-20-2012, 06:24 PM

Do you mean you saw no difference on the scales or the track

**brad hibbard** · 07-20-2012, 09:29 PM

I am no longer in the chassis business but can possibly shed some light on this subject

a longer spring has more stored energy

here is an exagerated example of a LR situation

400# 12 inch spring compressed 2 inches has 800#'s of pressure
100# spring compressed 8 inches has 800#'s of pressure

figuring both of these to be at the same exact ride height (and they should be)

when the car rolls rolls up 1 inch the short 400# spring only has 400#'s of force But the long 100# spring in the same amount of roll would still have 700#s of "stored energy"

jmo

Brad
www.race-1.com

**dirt fox** · 08-09-2012, 11:46 PM

So which is better?

**3dinter** · 08-10-2012, 10:27 AM

Originally Posted by ToddSmith16

13 should work just fine if you run 9.5 in fronts.

Are you serious....9.5 up front, when i had a 9.5 in the front on a metric we was dragging the ground on all the bumps....we went to 11" and wont go back.