Thread: 250lb springs on highboy makes sky jacker ad

Tweet

The way I do it is, I want my ride height in the center of the travel of the shock. So I start off withe a piece of tubing and drill two holes in it representing the ride height. Set the car at the ride height I want, then do my shock mounts. Then spring it to that height. My roadster weighs 2440# and I use 180# Springs and sits in the middle of the shock stroke. In my opinion that is the correct end result.

[QUOTE}my question is do these settle?[/QUOTE]

Springs do not settle. Sagging suspension is due to spring over exertion, that is stress beyond the springs limit (like hitting pot holes, or overloading the trunk with bags of cement on a Home Depot trip).

A 250# will absorb energy at a rate of #250/in.
If you put 500# on it - it will store 500# of potential energy by dropping 2 inches. This assumes the spring sits at 90 degrees.

A 30 degree offset reduces the downward force on the spring by 30%.
So now it only stores ~333 pounds of energy and drops only ~1.3 inches.

At least that's the theory behind the issue -

The experienced builders here know exactly what is needed.

Originally Posted by Ken Thurm

The way I do it is, I want my ride height in the center of the travel of the shock. So I start off withe a piece of tubing and drill two holes in it representing the ride height. Set the car at the ride height I want, then do my shock mounts. Then spring it to that height. My roadster weighs 2440# and I use 180# Springs and sits in the middle of the shock stroke. In my opinion that is the correct end result.

Ken,

Most shock manufacturers advise the ride height to be above the 50% mark. The 1/3 figure I gave earlier is pretty common. No biggie, though if 50% works for you.