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Old 07-13-2003, 10:23 PM   #16
WC
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Quote:
Originally posted by blixelX
so that means i can hav lower ratio (lower than the lowest in the manual) if i hav a better motor, rite?
To stop any confusion...
a LOW gearing (= high number) eg 10:1
a HIGH gearing (= low number) eg 6:1


A RS540 silvercan only revs to about 20,000rpm, so if you want higher top speed you need to gear Up. For a higher ratio, you either use a bigger pinion, a smaller spur gear or both.

A modified motor can rev a lot higher.... up to 40,000rpm is not unheard of. However if you gear it too high and the mod motor is not able to rev fully for most of the lap, it will bog down and overheat. Heat is VERY BAD for the motor.


So in short... the silvercan will survive skyhigh gearings, but mod motors should be geared lower so that they can rev all the way.



Quote:
i just bought 20T & 21T pinion, and had tried the 20T pinion, really can see the diff by comparing with the 16T pinion...
You can go up to 25t on the TB01. On a large track, the 25t is very suitable for the silvercan kit motor.
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Old 07-13-2003, 10:29 PM   #17
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thz every1... u guys r so kind...

WC, u owned a tb01 too?? which1 u using?? normal type or evo type??
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Old 07-18-2003, 09:15 PM   #18
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Default Re: Re: Gear ratio formula

Quote:
Originally posted by WC
Formula is:

(spur / pinion) X (diff gear / bevel pinion)


on TB01, I think you've got:

( 61 / 16 ) X ( 39 / 15 ) = 9.9125


For "rollout", just divide the circumference of your tyre (pi x diameter) by the 9.9125.
how u get the diff gear and the bevel pinion??

besides that, is belt driven car same hav the same formula like shaft driven?

Last edited by blixelX; 07-20-2003 at 07:16 PM.
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Old 07-21-2003, 01:02 AM   #19
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can any belt user confirm this to me...??? thz...
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Old 07-21-2003, 02:53 AM   #20
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You work out the number of teeth on gears and pulleys by counting them, either that or their sizes are listed in the manual. Belt drive cars are the same except you use the layshaft pulley and diff pulley for the calculations.
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