The SCT410 is Tekno RC’s brand new 1/10th 4×4 Short Course Truck. It is built from the successful EB48 1/8th scale Electric Buggy platform.
There are many new parts on the SCT to keep weight to a minimum, including new lighter arms, steering blocks, spindle carriers, rear hubs, and an all new lightweight drive train. Add some sturdy adjustable body mounts and a front/rear bumper system and you have the SCT that everyone has been waiting for – true 1/8th scale roots with 1/10th scale weight and agility.
This new Short Course 4×4 was released at the end of January 2013 and has already had some impressive finishes around the world.
The build was effortless as the kit is packaged in two big bags with multiple bags for every step. It was very enjoyable and it’s nice to build a kit that you don’t have to rummage around for the right parts tree, screws, bolts, spacers and other small parts that can be problematic with other kits.
The build starts as most kits, with the differentials. Three liquid filled differentials with oil supplied in the kit. Thick beefy gears and cases hold it together. Compared to other kits these differentials came with a machined flat spots at the end of each cross pins that slots into the case for ease of installation.
There was an addendum to the first run of kits that were sent out on launch week in mid January. All kits since have been sent out with the needed 0.5mm washers. (As seen in the picture above)
After installing the 4mm 7075 aluminum shock towers was the installation of the sway bars (22mm & 24mm) that can be swapped from front and rear. There is a “window” type slot on the sway bar mounts where you can read the thickness of the swaybar installed. This will make for less guessing when discussing setup of the vehicle.
The Front Outer Aluminum Hinge Pin holder provides strength in case of front impact while the other holders are in composite.
The Hinge Pin holders come with inserts to adjust:
“Sweep” Front Outer – from 1 degree forward to 1 degree back
“Kick Up” Front Inner – from 10-12 degrees & Caster from 20-22 degrees
“Toe In” Rear Outer – 1.5, 2.5 or 3.5 degrees (Plus the hub carrier has a built in toe angle of 1 degree)
“Anti-Squat” Rear Inner – from 1-3 degrees
The front CVD’s are extremely stout with a stub shaft that has extra drilled holes for the cross pin and in turns lightens the part.
Next was attaching the parts I just built to the chassis (7075, black anodized). I decided to run the lighter EB48 chassis since I will be running the truck on a smooth Astro Turf Track – Dirt Trax 2.0 and want a light vehicle. The EB48 chassis is 2.3 ounces lighter. Part number TKR5000F.
The turnbuckle links, pivot balls and rod ends are in no comparison to ball cups seen on other brands. Also the vehicle comes with a built in servo saver.
A composite servo horn is included. This is the main part I replace on all my RC vehicles. I would suggest upgrading to an Aluminum Servo Horn for the added strength and peace of mind. OFNA & Hot Bodies servo horns seem to fit well from what I hear.
Next was setting up the steering rack and I noticed the tight clearance of the wheels to spindle cap screw head. SC10 wheels had about 2mm of clearance upon inspection. Four washers were supplied to handle bump steer however only one is used on the bottom of the ball end. You could remove the three spare washers and add a shorter cap screw or change the screw to a button head if you have clearance issues with the wheels you chose. AKA 12mm Hex wheels for the SCTE and SC10 seem to fit well and are known to be the strongest Hex SC wheel available.
Next was installing the bumpers, held on by four screws. To change the oil in the differentials, you would need to remove those four bumper screws and then the four screws holding the differential cover; then you would have the diff. in you hands.
Three chassis braces are provided with the truck (front, centre, rear). As a rear traction / flex tuning aid, some drivers are running without the centre and rear braces. The front brace should never be removed.
It was then time to build the massive 16mm shocks. They can be built in three fashions (Standard bladder, Vented Cap bladder or Emulsion).
The differences are explained in detail in the manual. The Team drivers suggest you use Standard bladder for smooth tracks and Vented Cap bladder for rough outdoor tracks. I built mine as Standard bladder. Shock oil and Pink Rear & Black Front Springs are provided in the kit. Other spring rates are available as an option.
Here’s a comparison of the 16mm Tekno shocks to the 13mm shocks used by the competition.
Final assembly was to install the electronics & side pods. The servo installation was a quick easy step. For added shock resistance to the electronics, an ESC tray is provided where you CA glue three o-rings to the bottom. These will help prevent future ESC issues due to hard impacts or crashes. The receiver box is located at the rear of the vehicle where your receiver will be kept away from the elements (water, dust, mud etc.)
The battery tray comes with three velcro straps that will secure your battery in the centre of the tray. There’s about 5-10mm of wiggle room where you could add foam to move your battery to a side & back or front.
The motor mount insert is quickly installed via two screws to the motor. You must use a Mod 1 pinion. Then guide the motor mount insert into the motor mount where you tighten down the upper and lower screw after you have set your gear mesh. Note: a hole was designed in the chassis where you access the bottom motor mount screw.
The Nerf bars are different in size due to the layout of the chassis. The shorter one goes on the right/passenger side. Option parts I suggest are Air Control Guards TKR5504 that will help reduce the parachuting effect while attempting to clear big jumps. Also reports have stated these help keep the truck stable down straight away sections.
The provided body posts can be installed in a variety of ways for any existing short course body to fit without an issue. Therefore ALL SC bodies will fit this truck.
Last is the installation of your wheels. Provided are serrated lock nuts in a Gun Metal Finish.
Tekno should be very proud, the attention to detail is spectacular and the overall building experience was second to none. I can’t wait to hit the track.
Tekno RC Team Driver
For more on the SCT410, check out the Rcottawa Forum for setup help.