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Author Topic:   Rear Spring Location.
posted November 06, 2002 06:51 PM
How does the differect monting locations affect the car?

A: on swing arms with a slider.
B: on top of housing with wedge bolt.
C: in front of but mounted to housing
D: behind housing.


posted November 06, 2002 09:57 PM
Here goes:
A= I have no experience w/swing arms

B= Static cross weight no matter what you are doing (on the throttle or on the brakes)

C= loads weight on that tire under throttle and unloads under braking, most often seen on the left rear

D= Loads weight on tire under braking and unloads under throttle, usually seen on the right rear

posted November 07, 2002 08:32 AM           
A=C with a minor difference in spring rate due to the distance from the housing.

Good question Peddler and good reply Greggie!

Racer X
posted November 07, 2002 06:55 PM
We have run ours on top of the housing and on the swing arms. On top is simpler and easier to adjust. No slider to bend, bind up, or break.

Thanks for the replies.

posted November 07, 2002 09:10 PM
RacerX, he means that the spring rate isn't effected by the housing as it rotates when on the gas or brakes. For instance, if your spring is mounted (clamped) to the front of the housing, when on the gas, the wrap of the axle will add ride height as it pushes up on the chassis and it will add spring rate as it compresses it.

On top, it isn't effected by the axle wrap. Is it good or bad? Purely opinion. Some like the added bite with the spring in front on the LR and me, like the consistantcy of know what your car feels like at all times. Yep, I have mine on top of the housing.

I know thats not real clear but hopefully you know what I mean???

[This message has been edited by Wauge28 (edited November 07, 2002).]

Racer X
posted November 08, 2002 05:46 AM
Yes, thank you, this concerns us greatly. How about distance from the wheel? Is it just as simple as the farther you are from the contact patch of the tire, the stiffer the spring you have to run? Or are there other variables here?

posted November 13, 2002 08:32 PM
Hey Hondo,

It should just effect the amount of change you will feel. basically it changes the amount of weight jacking based on the length of the moment are (read: distance from axle)

As the axle winds up (rotates about it's centerline due to torque) it will compress the springs if they are in front of the axle. The amount is dictated by how far they are from the axle.

posted November 14, 2002 06:12 PM
Hrt187, Thanks, but I was refering to the distance from the tire contact patch to the point in board to the spring mount regardless of if it is in front of or behind the axle. I would guess that the spring would be need to be stiffer as you mounted more inboard and would promote more roll unless you wen't stiffer. But, are there any other issues invloved? I do like the idea of staggering the springs though, we may do this.

posted November 14, 2002 08:42 PM
Yep, the closer the spring to the tire, the less spring rate needed to hold up the car...and vice versa. I moved my spring inboard about 4 inches and raised my spring rate 50lbs. I think I might have gone a bit too far but only the track will tell.