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Old 03-05-2009, 09:05 AM   #1
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Default 008 FDR question

Hey,

I've been experiencing a problem with my 008, where it keeps eating up drive belts. This is caused because of the drive belt rubbing on the inside of the spur where the set screw goes.

I'm currently running the 2.375 gear ratio and heard that changing to the 1.75 gear ratio may fix the issue because of the larger rear pully would create more space above and below the pinion (makes sense).

However, I'm running a mad Scientist 27t Motor (Brushed) with the gear ratio of 8.31.

Making the change to the lower gear ratio, means that the highest FDR I can get with a 84t 24p pinion/spur combo is 6.8. Am I correct in assuming that event though I've changed the gear ratio, I should still be trying to run my vehicle with a 8.31 FDR?

Or does changing the gear ratio mean I have to find a new FDR that will also not burn up my motor?

FYI, I currently only have 48p spurs and pinions.

Any suggestions?
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Old 03-05-2009, 09:41 AM   #2
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Going to the 1.7 internal ratio gear set will definately help with your belt life.

It will:

A.) Move the belt further away from the pinion gear set screw which can damage your front belt.

B.) Reduce the strain on the rear belt preventing it from wearing out prematurely.

Your FDRs should remain relatively close to one another but some minor fiddling might be necessary due to the change in mechanical advantage you make on your drive train. But I'm thinking that difference is maybe 1/2 to 1 tooth one way or the other maximum.

Quote:
Originally Posted by Akhor View Post
Hey,

I've been experiencing a problem with my 008, where it keeps eating up drive belts. This is caused because of the drive belt rubbing on the inside of the spur where the set screw goes.

I'm currently running the 2.375 gear ratio and heard that changing to the 1.75 gear ratio may fix the issue because of the larger rear pully would create more space above and below the pinion (makes sense).

However, I'm running a mad Scientist 27t Motor (Brushed) with the gear ratio of 8.31.

Making the change to the lower gear ratio, means that the highest FDR I can get with a 84t 24p pinion/spur combo is 6.8. Am I correct in assuming that event though I've changed the gear ratio, I should still be trying to run my vehicle with a 8.31 FDR?

Or does changing the gear ratio mean I have to find a new FDR that will also not burn up my motor?

FYI, I currently only have 48p spurs and pinions.

Any suggestions?
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