Quote:
Originally Posted by Robbiejuk
The two numbers that people are putting down are the pinion / spur gear sizes.
In your example 23/80 would be read as having a 23 tooth pinion (Small metal gear attached to motor) and and 80 tooth spur gear (Larger usualy plastic gear mounted on the layshaft for the gear box.)
Changing gearing is as easy as changing the pinion. A Smaller pinion (less teeth) will give less top end speed but more accelleration. Transverlsey putting a bigger pinion on will have the opposite efffect so less accelleration but more top end speed.
You can also change the spur gear size to adjust gearing. A Smaller spur (less amount of teeth) will gear the car up so you will have less accelleration but more top end and using a bigger spur gear will gear the car down so you will have more accelleration but more less top end speed.
I have attached a gear chart that I have created for x2-x2c cars which show overall ratios depending on what pinion spur combination you are using which you might find useful.
HTH
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Is there a set gear ratio which you need to be aiming for to give you the best balance between acceleration/top speed from any given motor/pinion/spur gear combination so not to have the motor screaming with too fast an acceleration or too tall and getting too hot, if that makes any sense..............
cheers
