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U.S. Vintage Trans-Am Racing Part 2


Old 03-03-2014, 07:14 AM
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Try it with the battery forward.
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Old 03-03-2014, 02:40 PM
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Yes, it has a front one way.

Do they make plastic 2.0 toe blocks for a TC4 or do you have to pony up for the aluminum ones?

I also just bought a Spektrum DX3S so that may help. The Fly Sky seems to have a slight lag.
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Old 03-03-2014, 06:17 PM
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You have a TC4 that you're running VTA on carpet with a front one-way? I think that I would start with putting ANYTHING in the front and see how you like it (assuming, of course, that you haven't driven it with a spool or diff in the front before). In my experience, I could be MUCH more ham-fisted with spool in the front. I had a hard time developing the finesse needed to drive with a one-way. (your results may vary).
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Old 03-03-2014, 06:47 PM
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Originally Posted by nascarkeith View Post
Hello, fellow VTA'ers. I need a little set up advice.

Below are pics of the track and my set up then I will discuss my issues.






The car is very stable and easy to drive. I have plenty of speed and torque. No one passes me on the straights and I have a ton of pull coming out of the turns. Where I get beat is the middle of the corner. I have to turn the wheels pretty sharp to make the corner so it scrubs a ton of speed and pushes to the outside allowing me to get passed on the inside.

The fast guys who are racing me comment on how close my car is. They tell me it needs freed up just a little. I just haven't been able to hit that magic set up. A fast lap is a 9.5 and my best is a 10.0.

So let's hear it. What do you all think?
How are you setting your droop? Are you using setup blocks and setting the droop to 7mm front and rear? If that's the case, I'd think your car doesn't have enough droop, and not transferring enough weight to the front tires once you lift to enter a turn. Try setting the droop to 6mm in the front and 5mm in the rear, and see if that makes a difference.

You could also try adding some drag brake in small increments - with a one-way in the front, your car should initiate turns a lot better since you're using rear brakes exclusively.
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Old 03-03-2014, 07:08 PM
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I like how hard the one way pulls out of the turns. I had wondered about droop. I will add that to my list of things to try.
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Old 03-03-2014, 07:27 PM
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Originally Posted by nascarkeith View Post
Do they make plastic 2.0 toe blocks for a TC4 or do you have to pony up for the aluminum ones?
You'll need ASC31069, the aluminum one.
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Old 03-03-2014, 07:32 PM
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Originally Posted by nascarkeith View Post
I like how hard the one way pulls out of the turns. I had wondered about droop. I will add that to my list of things to try.
It will pull the same with a spool, because on-power, that is basically what a one-way becomes.
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Old 03-04-2014, 06:36 AM
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IMO, the spool has more of a push to it than a one way, under acceleration in a turn. Your results may vary.
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Old 03-04-2014, 07:19 AM
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Originally Posted by NutDriver View Post
IMO, the spool has more of a push to it than a one way, under acceleration in a turn. Your results may vary.
If you're under constant acceleration, the spool and one way will act identically. However, if you're in a turn and power to the front is disrupted (e.g. over a bump, or the driver lifts to adjust their line), the one way could disengage momentarily and give you a little more steering. Otherwise, both axles should provide excellent steering while on power in a corner.
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Old 03-04-2014, 11:39 AM
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Where do you get a one-way or a spool for a tc4.

I see some tc3 nitro one ways ... Do they fit? Do you cobble together tc5,6 pieces?
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Old 03-04-2014, 11:49 AM
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Originally Posted by Teamhotrods View Post
Where do you get a one-way or a spool for a tc4.

I see some tc3 nitro one ways ... Do they fit? Do you cobble together tc5,6 pieces?
The "Poor Man's Spool": leave the balls out of a ball diff, assemble with a light film of Weldwood contact cement on the faces of the diff rings.

This isn't recommended for diffs using plastic outdrives.
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Old 03-04-2014, 11:59 AM
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Originally Posted by IndyHobbies.com View Post
Here's some photos from last night at Indy RC.
looks like a sweet spot. What kind of chassis are you guys runnin ?

Ive got a TA TC4 im building so i think its going to be good for VTA class.
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Old 03-04-2014, 12:01 PM
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I ran a one way bearing in place of the front shaft cup. It would disengage the whole front drive off power. For a long time, this was in the rules as not legal and I removed them from my TC3s.

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Old 03-04-2014, 12:07 PM
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I know that my memory is not flawless, but I do not remember that being the case in the national rule set. (USVTA rules) Now I do remember some big races not allowing front one ways, but that was in addition to the USVTA rules. Kind of like lipo sak rules are at some tracks but not in the USVTA rules.
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Old 03-04-2014, 12:36 PM
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Another poor man's spool is to take the diff rings out of the stock TC4 ball diff and replace them with TC5 slipper pads. I haven't done it myself (yet. I have the parts), but I'm told that it's very much like a spool, but the slip under heavy load (like hitting the wall, etc while on power) is easier on gears, outdrives, etc.
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