Rear springs [Archive] - Chevelle Tech

: Rear springs


Mtume
Jul 13th, 08, 4:05 PM
I want to raise my rear end 2" or 3". I think it has tired originals now.
http://geting.se/image.php/113123-bes.jpg (http://geting.se/viewimage.php?image=113123-bes.jpg)

I found these on ebay

I was thinking of these: http://remartautoparts.com/Items/5557-mgh02?&caSKU=5557-mgh02&caTitle=Chevy%20Monte%20Carlo%20Impala%20Caprice%2 0Chevelle%20Coil%20Springs

or maybe these: http://remartautoparts.com/Items/5409-mgh02?&caSKU=5409-mgh02&caTitle=Chevy%20Chevelle%20SS396%20Pontiac%20GTO%2 0Olds%20442%20Coil%20Springs

I heard that monte carlo springs are a bit longer and stronger.
All inputs and tips are appreciated.

ROBC
Jul 13th, 08, 6:08 PM
Possibly the station wagon springs might help you out a bit.

Mtume
Jul 14th, 08, 9:59 AM
I checked for the wagon spring, but according to the copany I spoke with there ar no progressive springs to the station wagon. Is that so?
Does it have to be progressive springs in the back?

Does anyone know where I can find all the specifications for the springs?

ssal396
Jul 14th, 08, 10:11 AM
IMHO, 3" would be WAY too much to lift the rear of your car.. I wouldn't go more then 1" to 1.5" at the most.... Grab your floor jack and put it under the rear bumper and raise it to where you like it, make sure to measure it before and after..This will tell you how much to lift it..

Mtume
Jul 14th, 08, 2:11 PM
The wagon spring has a free height difference 2" taller than the stock coupe spring. Maybe that would be like 1,5" higher siting height difference.

LS7
Jul 14th, 08, 2:22 PM
I want to raise my rear end 2" or 3".

:eek: Mtume, I agree with Scott nail down exactly where you would like the rear to sit from stock, leave it on the jack for a little while to make sure you like it in that position.

This would go a long way in helping to make an educated decision on spring selection.

Mtume
Jul 14th, 08, 2:56 PM
It´s hard to say what stock heigt is, does anyone have a pic of a´70 with stock suspension?

Maybe 2",3" is too much, but what do you think about using station wagon stock springs?

michael67
Jul 14th, 08, 3:22 PM
Why not use el camino springs. Thats what I put on my 67 and it sits at top of rear tire.

Mtume
Jul 14th, 08, 3:47 PM
Why not use el camino springs. Thats what I put on my 67 and it sits at top of rear tire.

Are those harder and longer than coupe springs? Do you have a pic

furball8994
Jul 14th, 08, 4:11 PM
The wagon spring has a free height difference 2" taller than the stock coupe spring. Maybe that would be like 1,5" higher siting height difference.

Itīs hard to say what stock heigt is, does anyone have a pic of aī70 with stock suspension?

Maybe 2",3" is too much, but what do you think about using station wagon stock springs?

What your forgetting is, Spring hight-V-bumper hight. Look at a 4x4 that has a 4" lift and sits a foot higher.
Slide under your car and measure the hight of the spring (with the car on the ground). Now have a couple friends lift up on the rear bumper about 2" while you remeasure the spring hight. You will find that it only takes about a 1/2" extra spring hight to raise the rear 2-3".
Camino springs are about the same "free" hight as coupe springs. They are just stiffer and won't "squash" as much. Another thing is to see if the rubber spacer is at the top of the spring. Replacing that will give you about a 1/4" to 1/2" extra hight.

Mtume
Jul 14th, 08, 4:53 PM
I not sure how far down my rear is from stock. It looks a little bit sad, dont you think?

Schurkey
Jul 14th, 08, 6:39 PM
The goal would be to have the rear lower control arms as close to horizontal as possible.

Excellent post about using a floor jack to get an impression of how much the rear needs to come up.

There are two ways to lift the rear: stiffer springs or taller springs. In general, I'd want stiffer ones--although very tall, but weak--front springs are favored for drag racing.

figbash
Jul 14th, 08, 6:44 PM
I not sure how far down my rear is from stock. It looks a little bit sad, dont you think?

Your car looks to be at stock height. It should measure about 10" from the underside of the rocker panels to the road, front and rear.

If you want to raise the rear you'll need to either use spacers or have a custom spring wound. Using a taller and stiffer wagon spring won't allow the weight transfer you need for traction, unless you are just going for the look.

Tom

Mtume
Jul 15th, 08, 4:17 AM
Maybe I should give this a rest or just go with stock springs. Anyway I think a pair of new springs is needed, cause when I have people in the back the springs are pressed all the way down( idont know what you say for this in english but I hope you understand).
Maybe a set of cargo springs could be nice, but at the same time it would be nice if the stance looked something like this:
http://geting.se/image.php/113351-jpeg.JPG (http://geting.se/viewimage.php?image=113351-jpeg.JPG)

Morin69ss396
Jul 15th, 08, 7:26 AM
you might be suprised what a stock height set of NEW springs would do. If those rear springs are 38 years old chances are they are sagging a bit. I put stock height rear springs in mine and I think it's going to be a bit to high for me. Just my $.02 but I think the rear height is good and the front is an inch or so too high.

BB_Mike
Jul 15th, 08, 2:02 PM
Go back to stock and it will be high.

Go any higher and you will have pinion angle concerns which will eat up some U-joints. That and the 3rd member will slide "forward" in the wheel well as it rotats on the fixed length control arms.

Mtume
Jul 15th, 08, 3:46 PM
I´m leaning more and more towards the stock setting. As it is now there is no rubber thingi on top of the spring, so maybe if I buy some new stock springs and rubber it would be just fine, dont you think?

ssal396
Jul 15th, 08, 5:38 PM
Maybe I should give this a rest or just go with stock springs. Anyway I think a pair of new springs is needed, cause when I have people in the back the springs are pressed all the way down( idont know what you say for this in english but I hope you understand).
Maybe a set of cargo springs could be nice, but at the same time it would be nice if the stance looked something like this:
http://geting.se/image.php/113351-jpeg.JPG (http://geting.se/viewimage.php?image=113351-jpeg.JPG)

I guess it's all in what you like, but IMHO that car sits WAY too high in the back.... My car sits at stock height, but I want to drop the front end a bit..

http://img353.imageshack.us/img353/5312/vell1kn0.jpg (http://imageshack.us)
http://img353.imageshack.us/img353/5312/vell1kn0.57e5351257.jpg (http://g.imageshack.us/g.php?h=353&i=vell1kn0.jpg)

http://img379.imageshack.us/img379/1883/cb3dd3.jpg (http://imageshack.us)
http://img379.imageshack.us/img379/1883/cb3dd3.f13fae7e9a.jpg (http://g.imageshack.us/g.php?h=379&i=cb3dd3.jpg)

Mtume
Jul 15th, 08, 6:06 PM
Some might think mine is too high in the front, but thats the thing, I want a "higher", beefer look to it. I think that looks rough. And also, here in sweden, it feels like we have a speed bump every 100 yards;) so you dont want it to be to low. A guy I know had a low mustang and he had to go diagonally over them not to hit his car.

Mtume
Jul 15th, 08, 6:15 PM
Scott, nice car by the way:thumbsup:

Schurkey
Jul 15th, 08, 6:24 PM
Suspension height in the rear is limited by geometry--the lower control arm needs to be horizontal, or you get wheel hop problems.

If the car is to be raised from there, larger diameter tires would be my first choice.

Short, stiff springs will provide better cornering than tall, weak ones. GM original equipment springs are tall and weak.

Mtume
Jul 15th, 08, 6:35 PM
Suspension height in the rear is limited by geometry--the lower control arm needs to be horizontal, or you get wheel hop problems.

If the car is to be raised from there, larger diameter tires would be my first choice.

Short, stiff springs will provide better cornering than tall, weak ones. GM original equipment springs are tall and weak.

What about stock el camino springs arenīt they as tall as coupe but harder, there for better?

ssal396
Jul 16th, 08, 12:20 AM
Scott, nice car by the way:thumbsup:Much appreciated!!:thumbsup:

Schurkey
Jul 16th, 08, 4:09 PM
What about stock el camino springs arenīt they as tall as coupe but harder, there for better?
GM has MANY part numbers for springs; the springs were selected based on the options ordered. So "WHICH" El Camino springs are we talking about--'cause I bet GM had twenty or thirty part numbers.

MY choice, when it was MY money, was to install aftermarket springs with a high rate and short height--I got mine from H-O Racing Specialties--designed especially for improved handling in an A body. H-O isn't the only source, and it beats hell out of trying to find GM springs at a dealership or worse, a salvage yard.

After installing the four springs, my no-hop bars were pounding dents into the bed; so I added spacer blocks to the top of the rear springs to boost the rear about 1 1/2 inches. Works fine now, and I bet its near the stock rear height as the springs were intended to lower the rear about one inch.

Mtume
Jul 16th, 08, 4:27 PM
I´m leaning towards buying to stock coupe spring, but the CC version. Meaning it´s a Cargo coil. It´s supposed to be harder than stock when under load. That, plus the rubber spacing on top of the spring feels like it should be just fine.

PS the springs I´m thinking of is from Moog and is a cargo coil spring.DS

boz53bj
Jul 16th, 08, 5:46 PM
I bought a pair of Race car stock replacement coils for mine they worked out good.