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Old 12-04-2005, 08:00 PM   #1
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Default Gearing help!

I just got a new trinity cobalt 10-2 for my t4 what pinion should i use for it?
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Old 12-04-2005, 08:05 PM   #2
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Start at a 13t pin 87 spur and see how hot it gets from there. spur gears are small changes and pinions are bigger changes. Make small changes first.
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Old 12-05-2005, 01:14 AM   #3
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A 13t? Dude what are you smokin'!? Unless your running huge tires like Pro-line Masher 2000's that pinion is way to small.

For gearing you should first of all consult your trucks manual which recommends a 18 tooth pinion gear with the stock 87 tooth spur. I would start with a 17 tooth pinion and see how that works first off, go from there, if your running a really short track you may need to go down to a 16 tooth, if your running a really large track you will probably need to go up to a 18 or 19 tooth. If your motor is overheating in a 5 minute race that means your pinion gear is to large. There are alot of other factors that affect gearing as well, but the temperature of the motor is what you want to worry about. I find if my motor is getting above 160 degrees then its getting a bit to hot for me.
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Old 12-06-2005, 08:59 PM   #4
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just rember, you can't smoke a motor by gearing it with a small pinion.
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Old 12-06-2005, 09:00 PM   #5
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By the way, WheelNut how long have you been racing?
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Old 12-07-2005, 03:52 AM   #6
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Quote:
Originally Posted by SocalSnakeEyes
just rember, you can't smoke a motor by gearing it with a small pinion.
Actually you can, You can either over gear a motor or you can under gear a motor. Both have similar effects on toasting it.
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Old 12-07-2005, 06:35 PM   #7
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i've done it myself. I had an unknown wind mod motor and decided to throw it in for one race in my t4. geared it 15/87 to be safe. smoked it because it was WAY undergeared. turns out it was a 13x2.
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