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We used a highly accurate coordinate geometry software program to calculate the exact amount of Ackermann-or steering angle difference-between the two front tires needed for quarter- and half-mile racetracks. We then translated the angles into inches of toe. For a half-mile track, we would need only about 1/64 inch (or 0.03 degrees) of additional toe so the tire would follow the needed track due to the difference in radius between the front wheels. For a "tight" quarter-mile track, we need slightly more toe gain, or about 1/16 inch (or 0.11 degrees) of additional toe. These numbers represent fractions of degrees of Ackermann, not whole degrees. Remember, each 1 degree of Ackermann is 1/2 inch of toe. View Related Article
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