Tech Help, RC10TC3

2 Do you have a 2 speed tranny for the TC3?
No, 2 speeds in an electric car only work while there is a full charge on the battery. Once they start dropping voltage, they do not shift correctly.

3 Should anti-roll bars be used only on the front or back, or can it be used on both?

If you use one on the front, they will give the feel of more rear bite. If added to the rear, they give the feel of more front-end bite. But used on both ends it makes the car feel more responsive over all.

4 My TC3 has a clicking noise that seems to be coming from the rear transmission assembly.

Disengage the rear CVDs from both sides and then spin the drive shaft to isolate the noise. If it is coming from the diff assembly it’s either of the drive gears or possibly a bearing going bad. If you disengaged the CVDs and there is no noise, then put one CVD back and test, then remove and try the other to find the sound’s location. Repeat the process if the noise is coming from the front.

5 My servos keep breaking when I hit something.

Make sure that the screw that has the spring on the rack is not too tight! If it is, that could be your problem. There is very little space where the servo mounts to use an extra servo saver, but Kimbrough makes them. Make sure you get the small size and he makes them in different colors depending on the brand of servo. Kimbrough's phone number is (714) 258-7425.

6 I have 7 degrees more steering to the left than I do to the right

That is correct, it's the way the front steering blocks were designed. The rack will turn all the way to one side and not the other. That is to prevent the servo from locking when it turns left.

7 Can I just get the new outdrives and diff rings, or do I have to buy the complete kit?

You will need:
Outdrives, #3908
Diff rings, #3906
Lock nut, #3904
Bushings, #3907

8 I have found that many rims will not work on the TC3 due to the larger 8-32 thread of the axles, the larger locknut, and the size of the locknut driver that comes with the kits.

We use American Standard so you are correct. Foreign rims will not work. You must use American standard size.

9 Are you going to make a nitro conversion kit for the TC3?

No, the Nitro TC3 is a full kit of its own.

10 You mentioned that you ran the TC3 at 70mph on well used diffs. What was the set-up?

Ten 2000mAh cells, LRP v-6, LRP Phaser receiver, Jaco Green cap tires, 0 castor in front, O toe out, ride height about 8.5MM, 40 wt oil in front shocks, white spring, standard camber link mount and standard shock mount. In the rear, 8.5mm ride height, medium wheel base, O degree camber, O degree toe, 40 weight oil, yellow springs, #2 piston in rear and front, standard camber and shock mount [same as kit]. 4 OZ. lead weights on the right side of the chassis to counter the weight of the ten cells. 11 Double Sonic 2 motor geared 88/47 64 pitch. That's about it, GOOD LUCK and have fun, but have extra parts, because if it crashes at that speed the outcome is very predictable!

11 What torque rating for the steering servo do you recommend?

No lower than 70 to 80 oz. of torque.

12 When changing the weight of my shock oil, would I need to drain/dry out the foam inserts on the bobbins?

No real need to "drain" the foam insert.

13 How do your graphite parts differ in strength from the standard composite ones?

They are stiffer and lighter. Actually, graphite is less impact resistant.

14 The only real problem with the design is that it is pretty impossible to balance the weight of the battery side versus the motor/ electronics side with just the outboard transponder.

You can balance the chassis weight to counter the batteries by adding #1595 Factory Team Chassis Lead Weights to the right side of the car.

15 I notice that the TC3 is the fastest touring car in the world. How would I be able to beat that record?

Here are several things to keep in mind to make it official:
1. The track must be a large, closed-circuit race course, like a bicycle velodrome or very large oval of some kind.
2. National sanctioning body like ROAR or NORRCA overseeing and officiating.
3. No real technical rules, just electric, 4WD, wheel-driven only. No rockets!! No guide-rails or strings.

16 What's the differences between using 48 and 64 pitch gears?

48 pitch gears are used on most off road cars because they have large enough teeth that dirt particles won't easily "jam" your gear mesh, and they are also stronger than the smaller teeth found on 64 pitch gears, important when jumping and landing (which places great stress on the teeth).
64 pitch are finer, smaller toothed gears that have two advantages: First, they are very quiet and more efficient, and second, you can more finely adjust "numerically" your gear ratio. In other words, if you wanted to make a very, very small move up or down in your gear ratio, you could make it in 64 pitch. On the downside, the fine mesh is hard to set and more prone to stripping. Some racers move to 64 pitch when they find that small pebbles easily gum up the 48 pitch gears.
Why don't we include 64 pitch gears in the TC3 kits? We have found over many years that the very theoretical efficiency gain of 64 pitch did not offset the ease of gear mesh and durability of 48 pitch.

17 What's the best advice to keep from killing a servo?

Pull the spring out, collapse it with pliers, put a little of the black grease on the joint of the steering servo saver halves, and you will eliminate this problem.

18 Which front carrier block is standard in the kit?

#3868, 0 degrees caster.

19 Are the bearings for the steering rack PTFE sealed?

The rack bearings are sealed for best sealing against dirt; they are too small for more expensive PTFE sealing to make a difference.

20 How large is the space is for electrics on the right side of the car?

2" x 3.7"

21 Do you think that since the battery is on one side and the motor, receiver, esc, and servo is on another side would make the weight become imbalanced?

With the transponder on the side of the electronics it hasn't been a problem. You can always add weight if you feel the need.

22 Can the TC3 ride height be adjusted?

The ride height is adjusted the same way as in our off road kits, by the preload spacers added to or removed from the shock bodies.

23 Does the TC3 have a transponder mount?

The TC3 includes a transponder mount.

24 With this shaft drive, is there any chassis flex, and will this affect the alignment or the mesh of the gears?

The shaft floats, so if there is any flex then the shaft will not jam or break or ruin the gears. The shaft should last a long time.

25 What size are the bearings in the steering rack?

.125 x .250 steering rack bushing/bearing size, unflanged.

26 Does any given steering bushing touch the inner portion of the steering rack on opposite sides?

The inner dimension of the rack is slightly larger than the bearing/bushing diameter, so the bearings can make a small difference. The rack doesn't slide against both sides of the bearing/bushing at once, only on one side of the bearing/bushing.

27 Are there going to be foam tires available for tc3. i was just wondering because foam tires has helped us go faster since they are lighter than regular wheels, if the tires are grooved right they definitely help.

The TC3 will accept all popular touring car tires, including the hex foam tires.

28 Can you use a ESC with reverse on the TC3 since it has shaft drive?

You can use a reverse ESC.

29 Will this car have a "clicker" to allow the front tires to turn faster than the rear ones?

We will not have a clicker, but an optional one way diff.

30 What size spur does the kit come with? What's the largest spur that will fit without sticking out below the chassis?

The largest is 75T. A 72T is included in the kit. It is made of the same composite material as spur gears for our other kits.

31 Is the wheelbase adjustable?

It sure is! By moving the rear hub carriers forward or back.

32 How many teeth does the diff bevel gear and the shaft bevel gear have?

The drive shaft pinion is 16T and diff ring gear 40T. This means the drive ratio is 2.50.

33 I was wondering if the TC3 has any off-set with the stock rims like other companies.

No offset comes with the TC3.

34 Out of the box, is the TC3 underweight like most of the competition level dual belt cars?

The TC3 is underweight. The advantage of the graphite components, beside their lighter weight, is that their stiffness makes the car more responsive. Your electronics will make a difference in the weight of the car. You'll have the advantage of being able to place lead weights anywhere you wish to set the weight to your advantage, whether forward for more steering, rear for more traction, in the center, or outside for left turning, etc.

35 Why are the steering linkages superior to the other types?

The main difference between our steering system and most of the others is they did not put as much time into trying to make sure that the geometry was correct. Also the belt design makes it harder to get the steering geometry correct because the front diff and front diff support system can be in the way. We determined that the steering geometry was critical to getting the most from the car. We focused on making sure the car is efficient to prevent any unnecessary power loss or handling problems due to any steering design problems.

36 What is the final drive ratio of the TC3?

The final drive for the TC3 is 2.5.

37 My new set of TC3 bevel gears for the diff are a beige colour.

They are slightly stronger, as the dye has been not added to the mold.

38 How do the team guys maintain the TC3 PTFE Bearings?

After every race we pull them out and spray them with motor cleaner and re lube with lightweight oil.

39 What is the best way to remove the TC3s C clip from the hub bearings?

A small pair of needle nose pliers is best. Be careful not to lose the clip.

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