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Author Topic:   Different Height Rear Springs??
Randy 37
Dirt Roller

Total posts: 15
posted February 17, 2005 09:56 AM  
How does installing different height rear springs effect weight transfer to the rear. For Instance, if you normally run 13" springs, then change to 11", then readjust ride height, you should gain weight transfer because the top of the spring is lower in relation to the center of gravity. The opposite should occur when installing a taller spring. Am I way off base on my thinking???
Thanks, Randy

wfoondirt
Dirt Forum Champ
Total posts: 505
posted February 17, 2005 12:49 PM  
It won't change weight transfer. The only real benifit of a shorter spring would be that it might bow less in the middle.

NJantz
Dirt Forum Champ
Total posts: 755
posted February 17, 2005 02:17 PM  
won't change a thing. The tire won't know the difference. The forumlas to calculate your wheel rate don't change either. Just less active coils will be the only difference.

The main reason for a longer spring would be if you were facing issues of coil bind. Then you'd need a longer spring that had more active coils to cure that issue.

Randy 37
Dirt Roller

Total posts: 15
posted February 17, 2005 02:48 PM  
Could different spring heights effect the speed at which the weight is transferred. The reason I an asking is some guys down here in Texas that are running limited mods (like UMP/IMCA, but with stock metric front & rear suspension)and using 15" springs......Why? I understand that the taller spring will have more travel before it binds, but this is a stock rear suspension, not a floating 4-link....how much travel do you need. Unless these guys are going to a super soft spring....any clues?

Thanks for your time!

Randy

NJantz
Dirt Forum Champ
Total posts: 755
posted February 21, 2005 09:14 AM  
Your shock is what controls the speed at which the weight gets transferred. The spring controls how much weight transfers.

Usually when you go to softer springs, a longer length is required. It really all depends where the jack bolt/spring bucket is placed on the SIMS limited mods. I'm not super familiar with them. I've found that their is a wide misunderstanding on the spring lengths.

I'd guess the spring would travel +/-2" on one of those cars.


dirtdoc
Dirt Roller

Total posts: 8
posted March 17, 2005 04:52 PM  
move the left rear shock to the rear of the axel housing and the right one to the front, this will increase the forward bite and allow the weight to transfer to the drive side of the axel houseing.

dirtdoc
Dirt Roller

Total posts: 8
posted March 20, 2005 06:58 AM  
Isaid that backward the left shock needs to go in front and the right to rear this gives the car more foward drive and helps with weight transfer

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