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Old 11-29-2007, 06:21 PM   #1
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Default Final Drive Ratio's + TA04

Hey, I just purchased a Tamiya TA04S that has basically been hopped up to R status... anyways, I'm looking to get into racing indoor on-road, but I'm a total RC newb when it comes to advanced car building like this. I need to get some pinion gears, and maybe a couple spurs depending on what I need.
Basically, what I'm looking to know is are there standards in racing that everyone runs the same gear ratio?
if so, what is fairly typical for indoor road courses?
I know the internal transmission ratio of the TA04 is 2.123, and the spurs I currently have are 48 pitch 90T, 83T, and 64 pitch 96T, and 128T. I only have a 48 pitch 19 tooth pinion, and need to get some others to make the final drive I want.
I ordered a 39 tooth pinion to go with my 128 that will give my car a final drive ratio of 7:1 according to the calculation (spur/pinion x internal ratio).
That may not be good for racing though, I really don't know.
What ratio should I have for a road course, and what may be some good combinations to get it. Probably should use 64 pitch?
I appreciate any info to help me get this bad boy going

Thanks,
Kyle
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Old 11-29-2007, 06:27 PM   #2
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try http://www.gearchart.com/index.cfm?f...n=chart.create

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Old 11-29-2007, 06:44 PM   #3
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Quote:
Originally Posted by surrealmaterial View Post

I did get a gearchart made, and can see lots of combonations... but I'm also looking for info on what are common final drive ratios to run when racing indoor tracks.
Is 7:1 too much?
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Old 11-29-2007, 06:59 PM   #4
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it depends on what motor your running a monster or co27 stock motor runs around a 7.5 to 7.6 range and a epic x stock goes 7.6 to a 8.0 for a indoor technical track. hope this helps
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Old 11-29-2007, 07:11 PM   #5
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im running a revenge of the monster 27 turn stock motor. So maybe my 7:1 ratio wont be too bad then.
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Old 11-29-2007, 07:24 PM   #6
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yea that should be good. good luck
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Old 11-29-2007, 07:31 PM   #7
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That ratio should keep motor wear down to

and welcome to rctech
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