ShilohUSGT2012

The VTA class is a very popular RC racing class that is designed to look like the Vintage Trans Am series. The purpose of this article is to let all of the new racers know what works well at the carpet track so they can jump right in and have lots of fun racing on carpet in the VTA class.

VTA Rules Overview
Here is the basic list of things you will need for the VTA class:
4WD touring car chassis
VTA Spec Tires and inserts
VTA Spec Rims
VTA Spec Motor
7.4v hardcase LiPo battery up 5000 mAh capacity
1550g minimum weight
No boost/turbo/timing advance in the ESC (motor timing is allowed)
VTA legal body
Driver Figure

The official National VTA Class Rules and Specifications are located at the top of the VTA & USGT rules page in the section titled “Trans Am Class Rules and Specifications”. http://www.usvintagetransam.com/rules/

Chassis
Any modern electric touring car chassis will work and can be set up to handle well on the track. If you already have a 4WD touring car, you can easily set it up to run in VTA class. If you don’t already have a touring car chassis, you can look at both new and used options. Some excellent cars are the Associated TC5/TC6/TC6.1/TC6.2, Xray T1/T2/T3/T4, Yokomo BD7, and Tamiya 415/416/417/418.

There are less costly touring car kits that also run quite well on the carpet track. The Sakura S Zero kit can be bought new for about $110. If you want to get racing on the cheap, check out the Sakura S Zero. TQRCRacing usually keeps the Sakura S Zero in stock.
http://www.tqrcracing.com/shop/product_view.asp?p_id=1632

Another good cheap option is the Sakura XI Sport for $120.
http://www.tqrcracing.com/shop/product_view.asp?p_id=6163

If you need something even cheaper, check out the Turnigy kit for $70 at
http://www.hobbyking.com/hobbyking/store/__25176__Turnigy_TD10_1_10_Belt_Driven_4WD_Touring_Car_KIT_.html

And don’t rule out an old used TC3 or Losi XXX-S chassis. Guys still have great luck with those cars in VTA class.

Motor & ESC:
You must use one of the following 25.5 turn Novak motors in VTA class. No other motors are allowed in VTA class.
Novak SS25.5 Pro brushless motor (pn:3425V)
Ballistic 25.5 (pn:3625V- stator only pn:S6625)
Club (pn:3331)
Boss (pn:3626V)

In theory, all of those motors should perform about the same on the track. The Boss (pn:3626V) will usually run slightly cooler due to additional cooling vents in the design.

The VTA class used to limit the motors to no more than 45 degrees of endbell timing. That rule was removed. You can run any endbell timing you want now. A good starting point is usually 30-45 degrees of timing.

You can use any gearing that you want. A good starting point is usually an FDR of about 3.8 to 4.0.

The VTA class originally used a strict list of allowed ESC. That has changed, though. As of June 2014, the VTA now allows any ROAR legal blinky mode ESC. Here is a link to the ROAR approved ESC list for the blinky mode classes (spec classes):
http://www.roarracing.com/approved_non_timing_escs.php

Tires:
You must use the following HPI tires on the front of your VTA car:
HPI tire part #4793 “front” using stock tire inserts

You must use the following HPI tires on the rear of your VTA car:
HPI tire part #4797 “rear” using stock tire inserts

No other tires or inserts are allowed in VTA class.

The inserts will often have a big wrinkle in them from packaging. You can fix this by soaking the inserts in water and then letting the inserts sit on a plate for a few days to dry. If you soak your inserts, do not glue the tires on the rims until after the inserts have dried naturally.

Wheels/Rims
In VTA class, you must use HPI Vintage wheels designed to fit the VTA tires. All other rims are illegal. Wheels and tires designated as “front” must be used as front tires/wheels, “rear” wheels/tires must used as rears. Five or Eight spoke wheels are available in various colors. The front VTA wheels are 26mm wide and have a 0mm offset, while the rear VTA wheels are 31mm wide and have a 6mm offset.

You can choose from the following HPI parts:
8-spoke Vintage wheels from #3805 through #3814
5-spoke Vintage wheels from #3815 through #3822
Vintage stock car wheels from #3854 through #3860
Vintage Wheel CC Type #33472 and #33473
Vintage Wheel DTP Type #33474 and #33475

Tire Sauce: (Traction Compound)
These three tire sauces are allowed at the local track. No other tire sauce is allowed at the local track. If you race somewhere else, check with that track for their list of allowed tire sauces.
1) Trinity EPIC “Sticky Fingers” Odorless Tire Traction Formula (part number TRITEP5000)
2) Corally SXT (part number SXT00030)
3) Bite
The traction compound should be applied to all of your tires about 10 minutes before each race. Rub the compound back off of the tires using a pit towel. Then go race your car.

VTA Body
Late ’60s to early ’70s American pony car Vintage Trans-Am bodies only.

Bolink part numbers:
BL2262 ’68 Chevrolet Camaro
Also known as RJ Speed Part # BOL2262 and #1054

BL2263 ’65 Ford Mustang
Also known as RJ Speed Part # BOL2263 and #1055

HPI part numbers:
17510 – 1970 Plymouth AAR ‘Cuda
7494 – 1968 Chevrolet Camaro
17531 – 1969 CHEVROLET CAMARO Z28
17508 – 1965 Ford Shelby GT-350
17519 – 1966 Ford Mustang GT
104926 – 1966 FORD MUSTANG GT COUPE BODY
For the HPI and Bolink/RJ Speed Mustangs which are not provided with a spoiler:
A lexan spoiler of 16mm total height from trunk deck, and overall chord of 20mm is allowable. All other bodies must use the spoiler included with that specific body set as intended. Built in spoilers may not be enhanced.

17546 – 1970 Ford Mustang Boss 302 (scale wing ok)
105106 – 1970 DODGE CHALLENGER BODY

Parma part numbers:
10143 – 1969 Z28 Camaro
10141 – 1970 Boss Mustang
10113 – 1970 ‘Cuda

Pegasus Hobbies part numbers:
PGH4001 – 1970 Camaro SS
PGH4002 – 1970 ‘Cuda
PGH4003 – 1970 Mustang

Protoform part numbers:
#1526 – J71
#1535-30 1971 Pontiac Firebird Trans Am

McAllister Racing part numbers:
#286- 1969 Mustang body
#295- 1970 Pontiac Firebird Trans Am VTA body- 1/10- 200mm
#304- 1970 Chevrolet Camaro SS body- 1/10- 200mm
#305- 1968 Mercury Cougar body- 1/10- 200mm

Body provided deck lid spoilers allowed (not wings). No additional skirts or raised/extended wings or air control surfaces allowed. Body must be trimmed at body trim lines. Front spoiler may be extended into body to provide durability. Full rear bumper required.

It is highly preferred that bodies are detailed in race type livery in period-correct paint schemes. Fluorescent colors, wild graphics, chromes and non-period correct paint schemes are frowned upon.

All cars must have a number on the hood, both doors and trunk lid. Wheel covers of any type are NOT allowed.

Driver Figure
All cars must include a driver figure consisting of at least a head and shoulders.
Driver Figure part numbers (ANY suitable 1/10 driver figure is legal-these are readily available examples)

HPI
#104815 INNER BODY SET FOR DT-1 TRUCK BODY

Associated
6180 Driver, unpainted, 1:10

McAllister
#423 Stock Interior and Driver
#419 SPRINT CAR DRIVER

Battery
You can use any ROAR approved hard case batteries. The battery must be 2S. There is a capacity limit of 5000 mAh. Here is an inexpensive battery that racers have had excellent results with:
GENS ACE LIPO 5000mAh 40C 7.4V lipo battery pack (part number 98P-40C-5000-2S1P-HardCase at HobbyPartz)
GENS ACE LIPO 5000mAh 50C 7.4V lipo battery pack (part number 98P-50C-5000-2S1P-HardCase-2222 at HobbyPartz)
http://www.hobbypartz.com/98p-50c-5000-2s1p-hardcase-2222.html

There are more expensive batteries available, but these Gens Ace batteries will match the performance of most of them on the track.

VTA Suspension Setup
As for a good setup for your VTA car, the following is a good starting point setup for most cars.
20-25 lbs shock springs
20-30 wt shock oil
-2 degrees camber (tops of the tires in slightly more than bottoms)
0 degrees front toe-in
2-3 degrees rear toe-in
5mm ride height
2-3mm of up-travel (set using droop screws to limit how high chassis can lift above static ride height before tires will leave the ground)

If you run gear diffs, try 10k-50k wt diff oil in the front and 1k-2k wt diff oil in the rear.

If you run a ball diff, rebuild it and use 600 grit sand paper to scuff the diff rings. This will give the balls something to grab on to. Then build the diff just tight enough to keep it from slipping. Don’t over tighten. Install your ball diff in the rear, and use a spool in the front.

Remember, this is merely a great starting point. A big part of the fun is dialing the cars in to adjust them to the track and your personal driving style.

More information can be found in the U.S. Vintage Trans-Am Racing Part 2 forum thread on RCTech. For example, there is a good post that contains links to all of the latest VTA legal bodies.