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Old 02-09-2011, 03:58 AM   #1
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Questions?? Drift Gear Ratios

Hi All,
Turns out someone made a boo boo, when selling me a component for my gearing. I have recently purchased a Yokomo MR-4TC SD SSG Special.

I was sold an 18T pinion, which should have been a 23T and put it with what should have been a 78T spur. Well.... short story is..... no more 78T Spur, the steel pinion just ate it for brekky lol.

Now, the simple part of this thread:

What is the best gear ratio for drifting?

I was advised to use a 78t/48p Spur in conjunction with a 23T/48p pinion.

when I did the calculations, it seemed to make sense, but I would like to get others opinions

CHEERS,
Dave
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Old 02-09-2011, 04:17 AM   #2
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It sounds like the meshing of the two gears wasnt set correctly, you can usually match any pinion to spur gear providing the motor mount allows it.

You should allow a very small amount of movement between the two gears, but not so much that it stresses the two gears to stripping the teeth. you should feel probably less than 1mm of movement when you hold the pinion gear and rock the spur gear back and forth (that is a very rough estimate but its not easy to explain in words )

If the reccomendation came from a good source, I would order that spur/pinion gear, get them fitted and take things from there.

Keep an eye on the motor temperature after, say 3 minutes of use.
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Old 02-09-2011, 04:32 AM   #3
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Post much appreciated

Quote:
Originally Posted by tc3team View Post
It sounds like the meshing of the two gears wasnt set correctly, you can usually match any pinion to spur gear providing the motor mount allows it.

You should allow a very small amount of movement between the two gears, but not so much that it stresses the two gears to stripping the teeth. you should feel probably less than 1mm of movement when you hold the pinion gear and rock the spur gear back and forth (that is a very rough estimate but its not easy to explain in words )

If the reccomendation came from a good source, I would order that spur/pinion gear, get them fitted and take things from there.

Keep an eye on the motor temperature after, say 3 minutes of use.

@ tc3team,
Thankyou for the advice, much appreciated mate

Cheers,
Dave
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Old 02-09-2011, 05:20 AM   #4
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Quote:
Originally Posted by DK2B View Post
@ tc3team,
Thankyou for the advice, much appreciated mate

Cheers,
Dave
No worries, sorry I can't help you any more with the gear ratio but I don't do drifting to know anything about it
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