Thread: gear ratio
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Unread 20-11-2008, 09:40
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Re: gear ratio

Quote:
Originally Posted by JesseK View Post
If you ever see a reduction given in decimal format (e.g. the 2008 KOP's were 0.0784), THAT is where the output shaft rotates 0.0784 times per 1 revolution of the input (output:input). Car transmissions usually show reductions in this manner.
When did this start? I must have missed it.

All the car transmission gear ratios I've seen are expressed as the number of turns of the input shaft : one turn of the output shaft. For an overdrive transmission, the overdrive ratio is expressed as a decimal because the output shaft turns faster than the input shaft.

(I read Hot Rod, not Motor Trend, maybe they do things differently?)