What is a "bump steer" kit?

Chevyguy · 09-16-2002, 04:46 PM

The bumpsteer kits fall into two categories I have seen,

Offest rack bushings

Adjustable tie rod ends.

Since Mustangs have a strut front end, you can't really use drop spindles which is the best way to lower a car, that maintans the proper geometry.

When you lower a car with springs, this squats the car lower on the A arms as there is only one pivot point for the suspension. Using caster/camber plates allows the caster to be set properly at the new ride height.

Bump steer is related to the geometry of the steering linkage in relation to the spindle, which is set to be in the middle of the arc from the spindle to the rack. The lowering process changes the length from the rack to the spindle. So when you hit a bump, the wheel can get pulled inward, causing "bump steer" The Offest rack bushings raise the rack, or the adjustable tie rod ends lowers the attaching point to the spindle.

At least that's what I understand about the issue.

P.S. My Notch was a virgin too. Isn't it kinda cool when you find the silencer still there!! Of course I had original everything, plugs wires PCV Cap&Rotor struts and shocks all 99K miles 11 years old

09-16-2002, 04:46 PM	#1
Chevyguy Backyard Mechanic/Chemist Join Date: Feb 2001 Location: Acton MA USA Posts: 435	The bumpsteer kits fall into two categories I have seen, Offest rack bushings Adjustable tie rod ends. Since Mustangs have a strut front end, you can't really use drop spindles which is the best way to lower a car, that maintans the proper geometry. When you lower a car with springs, this squats the car lower on the A arms as there is only one pivot point for the suspension. Using caster/camber plates allows the caster to be set properly at the new ride height. Bump steer is related to the geometry of the steering linkage in relation to the spindle, which is set to be in the middle of the arc from the spindle to the rack. The lowering process changes the length from the rack to the spindle. So when you hit a bump, the wheel can get pulled inward, causing "bump steer" The Offest rack bushings raise the rack, or the adjustable tie rod ends lowers the attaching point to the spindle. At least that's what I understand about the issue. P.S. My Notch was a virgin too. Isn't it kinda cool when you find the silencer still there!! Of course I had original everything, plugs wires PCV Cap&Rotor struts and shocks all 99K miles 11 years old __________________ 2001 Crown Vic Maurader Airbox/MAF, DR chip Edel IAS shocks Single exhaust :wtf: 93 P-71 Vic interceptor Backup car now 90 5.0 LX Notch SOLD 74 Chevy Laguna type S-3 454 under construction Currently apart undergoing bodywork.