I have a 2000 GT. It has 315/35R17's on the rear and 275/40R17's on the front. Suspension is stock.
I was wondering who makes the best rear control arms. I am interested in both drag and road course. I was leaning towards Lakewoods Traction Action lowers and Lakewood uppers. Would this be too much for road course? I was also looking at Granatelli Control arms Arms.
As far as springs are concerned, I want to go with MS-5300B springs from FRPP. They lower 1 1/8 front and 7/8 rear. Have a 425 lbs/in (f) and 200/300 progressive (r).
Do I need bumpsteer kits and offset steering rack bushings with these springs? Which control arms are better? Will this route kill straight line performance?
If I weld my torque boxes in solid, will I still need torque box reinforcements?
Sorry for the late response, we try our best to monitor this board as much as possible. You can also e-mail us sales@stangsuspension.com or call our toll free # 877-272-5670 any time to reach us...
To answer your questions.
1. Control Arms - there are two things that make a good control arm. One is the bushings. There are MAJOR differences between the quality & materials of different manufacturers bushings.
Two manufacturers may say they use Polyurethane bushings, but what is the design? Are they two piece one piece? What is the durometer (stiffness)?, are they using different bushings at each end of the control arm? etc.
I think Maximum Motorsports, by far uses the best combination of a super high quality spherical bushing, with the right durometer urethane on each ends of the control arm. The best results and satisfaction of our customers have been acheived with MM control arms.
2. Springs - The M5300B are actually 425-530 front rating, 200-300 rear rating. Much stiffer than you posted. They're stiffer because 425 is just the low end of the front progressive spring rating.
Ford B springs are good for slightly lowering the car, not a major drop. They will not kill straight line performance because they're not that stiff of a spring rating. They will still allow for weight transfer, etc.
Control arms will definitely help straight line and road performance, both!
Bumpsteer is caused whenever you lower your Mustang. It is at the drivers discretion whether it bothers them enough to use a bumpsteer kit. Some drivers are not sensitive enough to even care, some do notice it...
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