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done my homework need your advice on ratio's

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done my homework need your advice on ratio's

Old 07-28-2004, 03:14 AM
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Default done my homework need your advice on ratio's

Hi guys

been doing some math's to work out the the gear ratio for my xray and i need your advice as i am getting some good figures but im not sure if im over or under gearing please can you let me know what you think

wheel diameter is 60mm and my motor rpm is around 19,000

here is my results

93spur with 35 pinion = gear ration of 5.65 which will give me a rough speed of 23.66mph

but if i use

78spur with 35 pinion my ration will be 4.74 which works out with a speed of about 28.21mph


from my results dose this mean the 78spur set up will have a better top speed but lower take off and the 93spur or what
Old 07-28-2004, 10:12 AM
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Default RE: done my homework need your advice on ratio's

yes. 93 spur 35= slower better take off...78 spur and 35 pinion = faster slower take off

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