by cosvega76 » Mon Sep 26, 2016 8:16 am
Art,
How it works is a suspension theory called "instant center". If you draw imaginary lines through the centerlines of the bushings of the upper and lower control arms, where they intersect is called the instant center. For the "Reader's Digest" version, in the factory configuration the IC is in front of the front bumper. What the hop stop bars do is bring the IC back to closer to the center of the car, which helps plant the rear tires instead of make the rear end squat.
Naturally, there's more to it involving the center of gravity of the vehicle and the imaginary line from the contact point of the rear tire up to the level of the center of gravity at the front axle, but you get the idea.
Chuck