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Old 11-23-2011, 01:46 PM   #1
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Default Can a 25.5 compete with a 21.5 in VTA??

Hello All,

I recently have tried to broaden my race collection from off-road short course into on-road VTA class. My issue is I bought a tc3, built it to US VTA legal specs, dropped in the new Novak Edge speed control and 25.5 ballistic combo only to find that my local club is still running the 21.5 motors. My question is, can I still be competitive with the 21.5 motors or should I just sell the 25.5 and get a 21.5? This seems to be a very fun class, but I have only had practice time thus far and my times arent quite up to par with what the previous race day time sheets. I am still playing with the gearing and am waiting for the new spur and pinion in the mail, I was hoping someone may have some experience with this. Any help is much appreciated. Mike
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Old 11-23-2011, 02:06 PM   #2
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Originally Posted by d2dap636 View Post
Hello All,

I recently have tried to broaden my race collection from off-road short course into on-road VTA class. My issue is I bought a tc3, built it to US VTA legal specs, dropped in the new Novak Edge speed control and 25.5 ballistic combo only to find that my local club is still running the 21.5 motors. My question is, can I still be competitive with the 21.5 motors or should I just sell the 25.5 and get a 21.5? This seems to be a very fun class, but I have only had practice time thus far and my times arent quite up to par with what the previous race day time sheets. I am still playing with the gearing and am waiting for the new spur and pinion in the mail, I was hoping someone may have some experience with this. Any help is much appreciated. Mike
just keep the 25.5 in your car until you get good getting around the track fast.
you will know when is time to bump to 21.5...
it isn't how big or fast your motor is ,it's how well you drive and throttler control your car around the track
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Old 11-23-2011, 02:12 PM   #3
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you can swap the windings out on the novak motors, so just buy the 21.5 stator and then you will have both and can race with either set of rules and it's only half as much a whole new motor.
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Old 11-23-2011, 02:41 PM   #4
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A good driver could beat most of the VTA guys with a crawler motor
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Old 11-23-2011, 06:47 PM   #5
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VTA is all about carrying corner speed. your overall speed is secondary to the handling of your car. Your 25.5 should be able to keep up, if...your car handles great.
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Old 11-23-2011, 07:16 PM   #6
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Depends on track size and layout along with setup and driver
On larger carpet larger than 35-70 the 21.5 is faster compaired to same car/driver with 25.5
But a track smaller than that size their very close with same car/driver
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Old 11-23-2011, 07:21 PM   #7
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Having a tc3 its going to be tough to get the fdr u need (3.8-4.0) its goin to take some very small spurs and some dremil work to fit a big pinion
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Old 11-23-2011, 10:26 PM   #8
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TC3 gearing, piece of cake, use a 1/12 scale 60t spur bolts right in, 60/39X2.5 =3.846. No grinding required, Ran mine all summer outdoor on asphalt with a 21.5 never blew it up.

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Old 11-24-2011, 12:22 AM   #9
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Thanks guys, I actually ordered 60t spur and 37t pinion, we'll see how it goes
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Old 11-24-2011, 11:23 PM   #10
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Quote:
Originally Posted by jlfx car audio View Post
Having a tc3 its going to be tough to get the fdr u need (3.8-4.0) its goin to take some very small spurs and some dremil work to fit a big pinion
The dremel work to make bigger pinions fit takes less then 30 seconds. I have run my TC3 in VTA from 3.3 to 4.2 FDR without any issues.

As someone else suggested, start with the 25.5, get a feel for the car, track, and setup, and look for a 21.5 stator assuming you like the class and want to continue.
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