Rig for victory
Q What is your opinion of pull-down rigs? And how do they compare with K&C and seven-post rigs?
THE CONSULTANT
A Pull-down rigs are mainly to be seen in oval racing. They were first used in lower division pavement classes where ground clearance and body template rules required the car to sit higher statically than people wanted it to run on the track. Where legal, people work these rules by running soft springs and hold-down shocks, while they try to have the car run on bump rubbers or small bump springs, at least at the front and sometimes at the rear as well, once it gets up to speed. This makes it desirable to have a way to set up the car in the shop that replicates those running ride heights, and to measure camber, caster, toe, and static wheel loads in that condition. More recently, dirt track racers have also started using pull-down rigs and measuring set-ups at some of the extreme roll displacements produced by rear suspensions that hike
