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Old 07-16-2008, 04:53 PM   #1
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Default Tamiya F103 gearing?

I decided to run again my Tamiya F103's. Problem: I do not know which gearing is ideal for this car. Being a direct drive car, the ration is 1:1. I use 64 pitch gears.

For 27 turn, it looks like a ratio of high 5 is good, from what I read. This would mean that with the optional 104 spur, I can use a 19 or 20 tooth pinion. For a 27 turn, I would go 2 teeth higher.

Could anybody confirm to me that this is the right approach?

Thanks!
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Old 01-31-2009, 11:06 PM   #2
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Originally Posted by usaserres View Post
I decided to run again my Tamiya F103's. Problem: I do not know which gearing is ideal for this car. Being a direct drive car, the ration is 1:1. I use 64 pitch gears.

For 27 turn, it looks like a ratio of high 5 is good, from what I read. This would mean that with the optional 104 spur, I can use a 19 or 20 tooth pinion. For a 27 turn, I would go 2 teeth higher.

Could anybody confirm to me that this is the right approach?

Thanks!
which f103 are you running? can you measure the diameter of the 104t spur? i ordered a set and it seems to be large from the pix.
i have a brushless 3300 and am at 4.375 now.
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Old 01-31-2009, 11:57 PM   #3
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Originally Posted by usaserres View Post
I decided to run again my Tamiya F103's. Problem: I do not know which gearing is ideal for this car. Being a direct drive car, the ration is 1:1. I use 64 pitch gears.

For 27 turn, it looks like a ratio of high 5 is good, from what I read. This would mean that with the optional 104 spur, I can use a 19 or 20 tooth pinion. For a 27 turn, I would go 2 teeth higher.

Could anybody confirm to me that this is the right approach?

Thanks!
if you use a 21t pinion that would be about right. that gives u a ratio of 4.9.
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Old 02-01-2009, 08:10 AM   #4
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if you use a 21t pinion that would be about right. that gives u a ratio of 4.9.
i also noticed the tamiya gears are MUCH larger than the regular 48 or 64 pitch gears. however there is a gap between the outside of the driveshaft annd the inside of the gear. there is a shim that fits the 64 pitch, you know if there is one that will fit the 48p?

F103RM-11 64Pitch POM Gear Ring from 3 racing.
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