[Jay Ess]

I am finally ready to re-spring my Speedster. I will be using a T rear, and a Posies A reverse eye and lower arc spring which is said to lower the front end by 2". I understand that the T spring should accomplish the same drop in the rear.

I am also interested in making the ride as compliant as possible. I am trying to figure out how I can at least be in the ballpark with initial modifications as I would like to eliminate as much trial and error as possible and hopefully minimize the number of times I will need to repeat the assembly/test/dis-assembly process.

The drive train is 100% stock with regard to its weight. It began its life bodied as a 4 door sedan. It is now aluminum bodied and the skin weighs about 50lbs (on the high side). There is a steel 1x1 sub-frame to which the body is attached and in total the materials weigh about 40lbs. The wood floorboards are still in place, and the fuel tank is the same weight as stock.

What I am trying to calculate is the difference in sprung weight between a 4 door sedan (body/interior) and my car as it stands now. I have searched the site, but I have been unable to find the weight of a 4 door sedan body, fenders, bumpers, etc..

Any help with that measurement would be appreciated!

Once that weight is a given, I will try to guesstimate a benchmark ratio of the stock spring rate, to the stock sprung weight. Once a baseline is established I will start removing leaves in an attempt to match the ratio.

I am hoping that the local spring shop will be able to help me with the measurements of my initial, and modified spring packs, using their shop equipment. I would hope that this get me in the right zone before I begin testing on the car.

Am I on the right track? Any input, insight, criticism, or comments are welcome.
Thanks,
js