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Old 04-13-2009, 08:01 AM   #1
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Default 21.5 Gearing

What do you guys gear your 21.5 motors too on touring car, gt w/lipo or 4 cell and 1/12th
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Old 04-13-2009, 12:15 PM   #2
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Depends on what track you're running. If its a wide open big track ill gear tall. If its small technical track ill gear down for more lower temps and not to have more turque because brushless are pretty torqie
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Old 04-13-2009, 08:07 PM   #3
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Quote:
Originally Posted by jhock View Post
What do you guys gear your 21.5 motors too on touring car, gt w/lipo or 4 cell and 1/12th
It also depends on the internal ratio of your Touring Car...that can differ by quite a lot. My Losi XXX-S has a 1.83 internal ratio but I think some of the Associated cars are more like 2.5. Big difference!
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Old 04-14-2009, 07:05 AM   #4
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With 17.5 in 12th we are already using the biggest pinions available with the smallest spurs we can get our hands on... You will need to overdrive the car to get all the power out of that motor in 12th. Probably talking spurs smaller than 72t and pinions just as big.. You will probably need to change to the old 12l3 'stealth' axle and small diff rings to make this work.
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