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Author Topic:   Need lower ride hight in front of car
sleadhead44
Dirt Maniac

Total posts: 109
posted August 16, 2004 02:02 PM  
How do I go about getting the front end of the car lower. It rides kinda high right now. '82 Cutlass. We can use racing springs, but may not move shock mounts. We must use stock shocks (or look like stock) with no heim joints.

stic8
Dirt Full Roller

Total posts: 69
posted August 16, 2004 03:26 PM  
you may need to cut the springs to lower your ride height if you cut about 1/2 a coil it will help to lower it

racer17j
Dirt Forum Champ
Total posts: 5390
posted August 16, 2004 04:44 PM  
I am not sure of the year but there is a big car spindle like a caprice that has 5 on 5 bolt patern and when mounted on the metric chassis it is a two inch drop from the factory spindles. You need the idler and steering arm from the big car.

Ron_V
Dirt Roller

Total posts: 8
posted August 17, 2004 07:13 PM  
Sled how much you wanna spend.I would say buy the 9" springs.The 1s I bought are 40 somthing a piece.And just shim it from there.

sleadhead44
Dirt Maniac

Total posts: 109
posted August 18, 2004 08:34 AM  
It has brand new Eibach 9.5" Springs in it now and it is still high. I have every spring from 750# - 1200# for front and 175# - 300# for rear all in 25# increments. Will cutting the coil change the spring rate?

GARYAL
Dirt Forum Racer

Total posts: 94
posted August 18, 2004 09:53 AM  
yes it will change the spring rate. the best way to figure the new rate if you know the old rate is to basicly make a ratio by hight say if it was 11" and you cut it to 9" its now 11/9 ths the rate if it was 1000 lb now it will be 1222 lb. do you understand?

sleadhead44
Dirt Maniac

Total posts: 109
posted August 18, 2004 10:41 AM  
Yep Understood. Thanks Garyal! So everyone what are your front ride hights at and where exactly are you measuring from? Also, what is the bottom edge hight of your nose pieces. I will check mine tonight so I can compare and see how much I have to lower it by.

Now does a spring directly affect ride hight? If I cut say 2" off a spring will it drop that side of the car by 2"? What about shocks, do they affect ride hight?

And you cut the top of the spring, not the bottom - right?

jay116
Dirt Freak

Total posts: 428
posted August 18, 2004 11:11 AM  
Cutting the coil 2" will lower the car alot more than 2", it is not a direct relationship. I am curious though, with 9 1/2" springs it should set real low unless you have spacers or shims or something to bring it back up. We run 11" up front on metrics with no spacers and if anything we are lower than the rest. Just something doesn't sound right.


Hutch5375
Dirt Maniac

Total posts: 123
posted August 18, 2004 02:21 PM  
The simple spring rate calculation depends on a couple of things and they are easy to measure and get you in the ball park if you decide to cut any springs. Here it goes....

(d^4 x G x 1000)/(8 x Na x D^3) = rate in lbs/in

Now what do the letters mean?

d - the diameter of the wire the coil is made out of.

G - shear modulus of the material of the spring (steel = 12000 ksi)

Na - the number of ACTIVE coils the number of coils that are actuall doing work, half coils count as well

D - Diameter coils are wound, often 4.5, 5, or 5.5

This get you in the ballpark. Hope this helps....

JRB13
Dirt Forum Racer

Total posts: 80
posted August 18, 2004 08:23 PM  
ONE WAY TO LOWER IT WOULD BE USE A SET OF LOWEREING SPINDLES OFF A S-10 IT IS THE SAME THING AS A METRIC THAT WOULD GIVE YOU EASY 2 TO 2.5 DROP AND UNLESS SOMEONE KNOWS WHAT THEY LOOK LIKE THEY LOOK STOCK. HOPE THIS HELPS.

    

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