What size axles should you be running to be sure that you will not break one?
A simple formula can be used to help you find the absolute maximum torque your car can put to the ground. To find the maximum torque, take the (Torque of your car) x (Your first gear) x (Your rear end gear ratio) x (90% efficiency).
For example, let's say your racecar has 600ft.lbs. of torque, you have a powerglide transmission with a 1.86 first gear ratio, and you have a 4.88 gear in your rear end. When you put those numbers into the formula, you get the following:
600ft.lbs. (torque)
x 1.86 (first gear)
x4.88 (rear gear)
x.90 (efficiency)
4901 ft.lbs. of Torque
This is the maximum torque transmitted to both rear axles if the tires have perfect adhesion to the track, a and you launch the car at its torque peak.
The torque rating of Moser Custo Alloy Axles are as stated.
30 Splin- 6,200 ft.lbs. (per axle)
31 Splin- 7,000 ft.lbs. (per axle)
33 Splin- 8,200 ft.lbs. (per axle)
35 Splin- 9,600 ft.lbs. (per axle)
40 Splin- 12,000 ft.lbs. (per axle)
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