Lowring a Mustang by cutting springs. You certainly can do it yourself, fairly easily. Removing the springs is the hardest part, but the rest is as I describe below. You MUST observe ALL safety issues...jack stands, eye protection, gloves (hot parts), and use the proper size tools.
Use a cutting wheel, not a torch, and remove only one quarter turn at a time. Replace the spring, move the car forward and backward to settle the spring and evaluate the result.
Coil springs increase their spring rates as the coils are removed, so the actual rate of the spring will increase as the coil is cut.
Should you remove too much, you can always order new replacements from parts stores, or from a dealer, for reasonable prices. Those prices are substantially lower than the "tuner" springs.
I have lowered many race cars using this method with great success. It is ony a time problem, with the refitting.
The only caution here is to not lower the car so far as to angle the lower arms upward from the chassis to the wheel...this is very degrading to the geometry during cornering and braking.
Good racing.
Bill |