If I have exhausted my reasonable loose in adjustment ideas I might choose to shorten the RR trailing arm an 1/8” to help cure the loose in condition. As the housing moves left the RR trailing arm gets longer and the RR tire moves back helping the car to turn. In this example, mounting the frame side of the Panhard Bar higher than the pinion side moves the rear end housing to the left as the chassis rolls. If you toe in your trailing arms at the front you can use the Hoop Panhard Bar or J-Bar to help over steer the rear end to cure a push in the middle. Drivers can adjust their line for a center push or exit loose but entry loose means you simply have to lift sooner. If you have a car that is loose then that condition must be fixed. Drivers always provide instant feedback and a rear end square adjustment is felt instantly. While I try to avoid messing with the rear end square it is an amazingly effective adjustment. It is possible that you could get a late race center push or the loose in condition could return after the tires heat up and wear a bit. Often moving the RR ahead cures the loose in condition but you run the risk that the fix is short term. I always feel that changing the square is a crutch that can create late race handling problems and potentially make your late race tires under perform. It is always my goal to maintain a square rear end and use all the other adjustments to find the right set up. Keeping these measurements on hand will allow you to make track changes with the confidence that you are maintaining a square rear end setting.Īll of my shop set ups include a rear end that is absolutely square. Once your rear end is square it helps to record the measurement from the brake rotor to the frame as well as from the trailing arm brackets to the frame both left and right. In your shop you need to spend the time needed to ensure that your rear end is exactly square. In general your static rear setting should be dead square. Understanding your three link suspension can give you adjustment tools to help you roll through the center of the turn or help to hook you up on exit. Have you ever driven a forklift or other hot rod that had the steer wheel in the back instead of the front? Rear steer rigs turn quickly and the term “push” just would never apply.
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