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Squaring the Front Axle of Your Open Wheel Race Car

6/16/2017
Squaring the Front Axle
  1. Having already squared the rear axle first, place the front axle on 4" blocks. Be sure to use a 1" shorter block on left side for raised rail cars.
  2. Adjust the sway bar so the shock brackets are equal distances from the bottom frame rails. This ensures proper offset.
  3. Set the front arm length by adjusting the radius rods until the desired distance is obtained from the center of the RF torsion tube to the center of the axle. This is generally 13-1/2" with the tape measure running parallel to the bottom frame rail.
  4. Caster is now set by placing an angle finder on top of the RF steering arm. Adjust the radius rods to achieve an angle of +10°. Now ensure arm length is still at the desired measurement.
  5. Set the lead by measuring the distance between the front and rear axles on the right side of the car, then set the left side with this measurement minus the amount of lead desired. This is generally 1/4".
  6. Measuring from the inside of the wheels, set 1/8" of tow out by adjusting the tie rod.
  7. Finally, set the axle on your race height blocks and install the stops.

Speedway axles are all reamed for the correct kingpin fit!

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