Why a shorter rear gear will accelerate the car quicker
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For the same crankshaft speed, the taller gear (2.73:1) will allow the car to go faster, but not get there as quickly. The shorter gear (3.73:1) will allow a slower top speed, but will get there in a hurry. | For the same crankshaft speed, the taller gear (2.73:1) will allow the car to go faster, but not get there as quickly. The shorter gear (3.73:1) will allow a slower top speed, but will get there in a hurry. | ||
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+ | In addition to more power pulses the numerically lower gear will multiply the torque in a direct ratio the the amount of gear change. Take an engine that produces 400 ft/lbs tq. With a 3.00 rear gear ratio it will out put 3 times the Tq at 1/3 the speed, in other word the Tq will increase to 1200 ft/lbs. If the same 400 ft/lb engine has 4.00 gears behind it the Tq will increase 4 times producing 1600 ft/lbs Tq, the downside is the reduction in rpm, now at 1/4 the original speed. |