Why a shorter rear gear will accelerate the car quicker
From Crankshaft Coalition Wiki
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You know that a shorter gear will provide more acceleration than a taller gear, but at the expense of lower top speed with the shorter gear. But how does it do it? | You know that a shorter gear will provide more acceleration than a taller gear, but at the expense of lower top speed with the shorter gear. But how does it do it? | ||
It's a matter of applying power pulses from the motor (or work) to the tire. | It's a matter of applying power pulses from the motor (or work) to the tire. | ||
| − | An 8 cylinder motor will have 4 power pulses for each 360 degree revolution of the crankshaft. It doesn't have 8 like you might think, because it's a 4-cycle motor. With any given cylinder in your motor, it takes about 180 degrees to pull in the fresh fuel/air mixture, 180 degrees to compress the mixture, 180 degrees to push down on the piston and transfer work to the crankshaft and 180 degrees to push the burned mixture out of the cylinder. 4 times 180 degrees equals 720 degrees to complete a cycle, or 2 complete 360 degree revolutions of the crankshaft. | + | An 8 cylinder motor will have 4 power pulses for each 360 degree revolution of the crankshaft. It doesn't have 8 like you might think, because it's a 4-cycle motor. With any given cylinder in your motor, it takes about 180 degrees to pull in the fresh fuel/air mixture, 180 degrees to compress the mixture, 180 degrees to push down on the piston and transfer work to the crankshaft and 180 degrees to push the burned mixture out of the cylinder. 4 times 180 degrees equals 720 degrees to complete a cycle, or 2 complete 360 degree revolutions of the crankshaft. So, for each 1 revolution of the crankshaft, only 4 of the 8 cylinders in your motor will have fired to produce work. |
I don't want to confuse you, but I have to explain it that way in order for you to do some calculations on your own. We'll use a 2.73 and a 3.73 rear gear for this explanation. | I don't want to confuse you, but I have to explain it that way in order for you to do some calculations on your own. We'll use a 2.73 and a 3.73 rear gear for this explanation. | ||
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[[Category:Rearend]] | [[Category:Rearend]] | ||
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