remember they're ratio's so take 1st gear
Quote:
Originally Posted by don55
1587 cc (vts)
1st===3.417:1
2nd===1.950:1
3rd===1.360:1
4th===1.050:1
5th===0.850:1
rev===2.500:1
final drive===3.938:1
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Imagine you're in first gear and your engine is at 3000rpm
the ratio 3.417:1 means that for every 3.417 revolutions of the input shaft the 1st gear will carry out 1 revolution.
so 3000/3.417 = 878rpm of the 1st gear
the 1st gear then drives the final drive (which is 3.938) meaning that for every 3.938 revolutions of the input gear (1st gear in this instance) the final drive will carry out 1 revolution.
so 878/3.938 = 223rpm of the output shaft to the wheels
if you're on 195/45/R15's and assuming it's perfect round...
the circumference is 1.75m
multiply by 223 (rpm of the output shaft/wheel)
give the number of metres done in a minute (389.9m per min)
multiply by 60 gives the number of metres done per hour (23392m per hour)
divide by 1000, gives the number of km's per hour (23.4kmh)
multiply by 0.625, gives the number of miles per hour (14.6 mph)
taaa daaaa
yes I'm bored.
bye.
actually it's a useful way to workout how incorrect your speedo is.
peace x