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Gt12 USA Spec

Old 07-11-2023, 12:19 PM
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Originally Posted by Poor_Boy
Putting together an Eclipses 4 for a upcoming GT12 race a few weeks aways. Looking for a good starting gearing for my 21.5 Motiv MC4. Running foam tires on a super tight grey carpet track (plenty of traction). Does similar motor timing work from 2s to 1s or does the lower voltage require different timing? Have run 17.5 pan car and GT12 in the past just looking for a head start on getting my car on the pace in a short period of time.
My local track is small .... we generally gear around the 80mm roll outs.
My MTC4 motors I timed starting around the 40* mark ....
Key is corner speed. If you can keep the car rolling then you dont lose that low end.
If you saw the wheel and just plow them in, well its like running breaks.
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Old 08-01-2023, 05:29 PM
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Anybody else wish this class would change to 17.5? I do… the 21.5 just feels a little too slow. You don’t have to let off the throttle the entire 5 minutes at our track.
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Old 08-01-2023, 05:31 PM
  #543  
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Just put a 17.5 in your car and put foams... when that's too slow go to 13.5 then 3.5
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Old 08-01-2023, 05:34 PM
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Originally Posted by JEFF SC10
LOL
Myself and a fella named Robert started the GT12 class in Orlando, at a indoor track that's now closed called Revolution RC. Bullfrog and friends claim they started it, its more like they hijacked the idea.
I still find that hilarious.
I got the idea from the UK guys since they run that over there with 13.5 or 17.5 motors but run a much heavier dedicated chassis like the Atom.
21.5 was just slow enough to be fast but not too slow, we tried it out with some Supastox bodies. I ran the Porsche and nicknamed it 'La Cucaracha' which got locally famous lol.
Originally we wanted it to be very simple a HW Juststock esc and HW locked can motor
Emphasis was on driving, cool looking bodies and paint schemes , slower more closer racing, and much easier to drive than these super fast 17.5 and 13.5 12th scales.
Pretty cool to see how the class has taken off, people really love it.
I see that it's gotten very competitve too.

so yea. that's how it REALLY started.. just thought I'd throw that in here.

gonna try these rubber tires out. I like the concept that they're already cut and last longer.
So it’s your fault we’re stuck with the 21.5…
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Last edited by LowDrag; 08-01-2023 at 07:38 PM.
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Old 08-01-2023, 07:41 PM
  #545  
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Originally Posted by phatboislim
Just put a 17.5 in your car and put foams... when that's too slow go to 13.5 then 3.5
21.5 GT12 with foams is the only pan car class my track runs…or else I would change.
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Old 08-02-2023, 02:40 PM
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Originally Posted by LowDrag
21.5 GT12 with foams is the only pan car class my track runs…or else I would change.
Oh well that's a track situation. Gonna have to coerce some of your fellow races to run 17.5. Wish my track still did foam GT12 but I'm happy back in 17.5
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Old 08-02-2023, 04:11 PM
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Originally Posted by LowDrag
21.5 GT12 with foams is the only pan car class my track runs…or else I would change.
Start a standard 17.5, LMP class with spec foams.
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Old 08-02-2023, 04:28 PM
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Originally Posted by RacinJ
Start a standard 17.5, LMP class with spec foams.
I’ve been thinking about it, you’ve motivated me to give it a go. I’ll see if I can convince a few to join me.
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Old 08-03-2023, 05:11 AM
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Originally Posted by RacinJ
Start a standard 17.5, LMP class with spec foams.
This is the way! Keep GT12 Slow.
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Old 08-03-2023, 10:02 AM
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Originally Posted by mrreet2001
This is the way! Keep GT12 Slow.
If the class is popular and growing, don't change it. 17.5, LMP is run all over the country.
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Old 08-04-2023, 05:21 AM
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Originally Posted by RacinJ
If the class is popular and growing, don't change it. 17.5, LMP is run all over the country.
That's fair, I guess I'm just annoyed that nobody wants to run 17.5 LMP at my track. I posted something on their FB page asking if anyone wanted to start running 17.5 and got crickets. It's just the GT12 feels so lame, it's so slow you can go full throttle the entire lap without letting off, and that's with a 110 rollout at our track.
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Old 08-04-2023, 05:23 AM
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Originally Posted by LowDrag
That's fair, I guess I'm just annoyed that nobody wants to run 17.5 LMP at my track. I posted something on their FB page asking if anyone wanted to start running 17.5 and got crickets. It's just the GT12 feels so lame, it's so slow you can go full throttle the entire lap without letting off, and that's with a 110 rollout at our track.
So do they not want to run 17.5 LMP because of the bodies or because of the motors / speed?
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Old 08-04-2023, 06:32 AM
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Originally Posted by LowDrag
That's fair, I guess I'm just annoyed that nobody wants to run 17.5 LMP at my track. I posted something on their FB page asking if anyone wanted to start running 17.5 and got crickets. It's just the GT12 feels so lame, it's so slow you can go full throttle the entire lap without letting off, and that's with a 110 rollout at our track.
17.5 Isn't much faster I converted my GT12 to a 17.5 and it wasn't much of a difference in speed.
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Old 08-04-2023, 07:30 AM
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Originally Posted by mrreet2001
So do they not want to run 17.5 LMP because of the bodies or because of the motors / speed?
I don't know... there is a big gap in driver performance. There's typically two or three of us that break away and lap the rest of the field several times. The rest of them are playing bumper cars. You're lucky if you make it through lap traffic without someone hacking you. I really like the cars and the class, but it kind of turned into a class for the slow guys given how slow the cars are. All the fast guys that were in it initially bailed once all the slow guys jumped in because the hacking got annoying.
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Old 08-04-2023, 09:19 AM
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Originally Posted by LowDrag
I don't know... there is a big gap in driver performance. There's typically two or three of us that break away and lap the rest of the field several times. The rest of them are playing bumper cars. You're lucky if you make it through lap traffic without someone hacking you. I really like the cars and the class, but it kind of turned into a class for the slow guys given how slow the cars are. All the fast guys that were in it initially bailed once all the slow guys jumped in because the hacking got annoying.
Hit up the faster guys and see if they want to move up to a 17.5 or 13.5 LMP class and let the others work on their skills.
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Last edited by RacinJ; 08-04-2023 at 09:34 AM.
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