Re: Scaling HELP !!!
 

It was 100#'s heavy on the left with no pre-load and me (driver) in it. I understand how the pre-load works and I am trying to get the scaling correct with the bars loose or no pre-load. I will check all the spring perch and mounts again but I think it just might be a weight issue. If all checks out I will add 30lbs to the right rear and report back. Thanks for the suggestions

Re: Scaling HELP !!!
 

Are the rear brakes disk or drum? Make sure the brakes are in good shape or this could steer the car with the front in the air. Have someone film it from the rear and study the car that way too. I would also start with making sure the rear is square in the car.

Re: Scaling HELP !!!
 

Had this happen to me. Right rear shock at full extension was .75" shorter than left rear shock. At the hit, rear would separate enough to pick up right rear tire causing car to turn right. This would only happen in very good weather or in a heads up race. We were lucky to find the problem with the help of the local track photographer. We only had to fix a hole in the oil pan and had to fix two front wheels on the Cuda.

Re: Scaling HELP !!!
 

check the axle housing to verify that it is, in fact, straight and true. this must be toe-in and camber. a lot of cars have bent housing and the driver does not realize it. especially 12 bolts, as they are weak, being three piece units. even when welding the tubes to the center, they bend. I just checked a 9" Ford and it was out almost 3/8" toe and a little less than 1`/4" camber. makes you wonder.
next make sure there is no rear brake drag [regardless of type].

Rod in AZ