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Gt12 USA Spec

Old 02-02-2022, 03:57 PM
  #466  
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Originally Posted by Kruss45
Johnn27 what motor are you using for that gearing range?
Iím using a hobbywing 21.5 at about 39-40 degree timing.1s battery. Iím currently geared at 68-49 and I have absolutely nothing for the top guys. Theyíre turning 11.6 - 12.0 lap times and my hero lap is 12.2. I canít seem to string low laps together. Itís not much fun when theyíre pulling 11.6ís and I have to pull over for them. Feeling a little frustrated about this
This is the hard part- figuring out where you're getting beat- mid corners, accelerating, or top speed- and why. GT12 is low powered, so you really have to get the car through the corners with a minimum steering throw. If you can keep up in the infield, compare the straight speed. And vice versa.

but .6 sec is probably getting you in the infield. Your car is probably understeering, especially mid corner and exit.
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Old 02-02-2022, 04:56 PM
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Originally Posted by BadSign
This is the hard part- figuring out where you're getting beat- mid corners, accelerating, or top speed- and why. GT12 is low powered, so you really have to get the car through the corners with a minimum steering throw. If you can keep up in the infield, compare the straight speed. And vice versa.

but .6 sec is probably getting you in the infield. Your car is probably understeering, especially mid corner and exit.
I agree, and to piggyback off what John is saying, the idea is to get the car aggressive on turn-in (less caster) with good rotation, all with minimum input from the transmitter. That keeps momentum up and lap times down. I've had a ball learning about pan cars properly with this class. The amount of tuning and driving skill is still all there, but in a more manageable package for the masses. I started with a mellow, drivable setup, than ramped up the aggression as I got more comfy with the car. It's been a ton of fun,
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Old 02-03-2022, 09:01 AM
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what rules are you guys using... I noticed it varies at times between tracks/clubs...

this is what we are using at Apex


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Old 02-03-2022, 09:18 AM
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For Florida since we race outdoors just change the tires to foams-spec wgt..
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Old 02-03-2022, 09:29 AM
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Limiting ESC to 1S only seems unnecessary. Some people use 2S ESC's along with a voltage booster.
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Old 02-03-2022, 09:53 AM
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Originally Posted by glennhl
Limiting ESC to 1S only seems unnecessary. Some people use 2S ESC's along with a voltage booster.
hummmm... let me check on that...might be just a mistake
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Old 02-03-2022, 10:05 AM
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By the way if any of you want to come down and get practice for the Nationals just check out the Valkaria posted race schedule. If you have a small airplane you can land next door and walk across the street.
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Old 02-03-2022, 10:11 AM
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"Any 1s capable ESC" should fix it. I'll get the update in
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Old 02-03-2022, 12:24 PM
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Originally Posted by DARKSIDE
what rules are you guys using... I noticed it varies at times between tracks/clubs...

this is what we are using at Apex

Up here in the PNW, we are doing a spec motor (Hobbywing Justock 17.5FT) and spec gearing (72/40), but other than that, same as above.
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Old 02-03-2022, 01:44 PM
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Better?
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Old 02-03-2022, 05:18 PM
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Originally Posted by cementsurfer86
Up here in the PNW, we are doing a spec motor (Hobbywing Justock 17.5FT) and spec gearing (72/40), but other than that, same as above.
How are the consistencies with the spec motors and gearing? Have you had any motors where they're just faster/hotter out of the pack compared to others?
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Old 02-03-2022, 05:43 PM
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Originally Posted by cementsurfer86
Up here in the PNW, we are doing a spec motor (Hobbywing Justock 17.5FT) and spec gearing (72/40), but other than that, same as above.
Soooo! I should swap to a 17.5 for next Wednesday instead of the 21.5 I ran a few weeks ago?
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Old 02-03-2022, 08:49 PM
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Originally Posted by glennhl
Limiting ESC to 1S only seems unnecessary. Some people use 2S ESC's along with a voltage booster.
Agreed!
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Old 02-04-2022, 09:07 AM
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Originally Posted by busman
Soooo! I should swap to a 17.5 for next Wednesday instead of the 21.5 I ran a few weeks ago?
We have not set our rules yet. If you want to run what is starting to become what several are running now, the HW stock Spec 17.5 which has fixed timing of 45* I think, if you want to use a different 17.5 with 45* and then run the 40/72 gearing, odds are you will be close enough. We are having fun so far, still sorting it out a bit, so just race what you have ready.

-a

Last edited by oldrcr; 02-04-2022 at 09:32 AM.
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Old 02-04-2022, 09:22 AM
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Originally Posted by TheBeave
How are the consistencies with the spec motors and gearing? Have you had any motors where they're just faster/hotter out of the pack compared to others?
So far the HW seems to be consistent. We have a couple more that will run that same motor the next race, so we will have more data. The few that have run the HW fixed timing 17.5 and 40/72 gearing have all been the same speed, no one faster in a straight line. The motors all come off barely warm.

-a
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