SC63 themed Associated TC3 along with predecessor HPI RS4 Pro (Gen1) Restoration

SC63 themed Associated TC3 along with predecessor HPI RS4 Pro (Gen1) Restoration

Final Build Photos

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Submitted By
Sean Gehani
Southwest, Saskatchewan, Canada
Build Information
Readers Ride Title SC63 themed Associated TC3 along with predecessor HPI RS4 Pro (Gen1) Restoration
Vehicle Class On-road Car
Chassis Brand Other
Chassis Model Associated TC3FT, HPI RS4 Pro (Gen 1)
Other Chassis Brand and Model HPI RS4 Pro
Body Brand Protoform
Body Model Venturi USGT and P63 Sedan
Power System Electric
Electric Motor Brand and Model Brushed modified 540 type motors between 11-16 turns
Speed Control Brand and Model Novak Cyclone (TC3FT), Tekin G12C (RS4 Pro)
Battery Brand and Model Zeee 2S Lipol (TC3FT), LRP 5000 6cell NiMH stick pack (RS4)
Wheels and Tires Brand and Model BSR 26/30mm foams (RS4 Pro)
Exceed 26mm foams (TC3FT)
Schumacher Contact 24mm rubber with MST rims (both)
Shocks Brand and Model Stock with aftermarket tuning springs and sway bars
Axles Brand and Model Mostly stock other than Kimbrough 64-pitch pinion/spur gears, Silicon Nitride diff thrust balls and titanium CVDs on front of TC3FT
Paint Brand and Model Vintage Pactra Racing Finish mixed to match SC63 Lamborghini paint tone (TC3FT)
Tamiya Lacquer Paint (RS4 Pro)
Graphics Brand and Model Protoform
Scale Accessories Brand and Model Digital vernier calipers, soldering iron, camber gauge, durometer, digital scale, RC hobby specific hardened steel or titanium shaft tools, microprocessor controlled chargers/dischargers
Light System Brand and Model N/A
Radio System Brand and Model Flysky FS-GT5 transmitter, Flysky 3-channel basic receivers, SkyRC GC-401 gyros common to both. HiTec high speed digital brushed coreless motor servo on TC3FT, GXservo X20 high speed aluminium body digital brushless servo on RS4, 5-cell LRP NiMH receiver packs on both cars and similar external supporting components
Sound System Brand and Model N/A
Other Options Brand and Model Many miscellaneous parts ordered from AliExpress and Amain Hobbies, a big thanks to these companies that span from USA to China and to Canada Post and its global affiliates for all of their hard work.
Further Description/Back Story As the RS4 was initially built in the late 1990's when the TC scene in Canada had matured although not yet sanctioned by ROAR, it had a few issues at the time that included the steering binding that have recently been resolved. This Gen 1 kit was developmental in that many of the molded parts and CVDs were designed to be either 190mm or 210mm (narrow or wide body) and the kit builder was expected to cut several parts down for the 190mm width (which later became the ROAR TC standard) or install spacers for 210mm. Although the molds were designed to accomodate sway bars, there were no sway bars (or bearings) included in the kit and consequently nothing to prevent the steering linkages from binding at max travel.

The TC3 Factory Team was built about 5 years after the TC3's introduction and although very sturdy and capable of going fast typical of Associated's champion offroad buggies, it had some rollover issues on carpet due to min height regulations and the car's center of gravity and the fact that it did not have provisions for droop limiter screws that were introduced on later versions of the TC3FT. Its worthwhile noting that the RS4 chassis layout and moment of inertia is very much like a 4WD F1 in comparison to the TC3FT chassis being more like a pan car, which has an impact on nimbleness and tendancy to roll. The key differentiators between these touring cars include:

-Tooling, the RS4 is entirely metric as compared with TC3 being mostly SAE(Imperial)
-Chassis moment of inertia, RS4 is laterally compressed double decker vs. TC3 being pan type
-RS4 is belt drive with slipper clutch and very quiet vs. the TC3 shaft drive that can handle more power
-TC3 was restored as 2S LiPol while the RS4 Pro uses a more expensive and heavier 6cell NiMH stick pack
-Although the TC3 coreless brushed servo was just about the fastest available during its time, the RS4 now has an even faster modern brushless high speed aluminum body metric digital servo
-The RS4's Tekin ESC has a torque(current) limiting dial, wheras TC3's Novak ESC utilizes a user programmable PWM controller without a current limiting feature
-Aerodynamics of USGT vs P63 Sedan body are probably not too much different although these body styles are now raced in separate classes

Both paint jobs were done with an airbrush and masking tape in order to limit the time and effort due to the nature of RC, as there is still evidently alot that needs to be studied wrt. traction roll when using foam vs rubber wheels. As I have always been a fan of foam and 2wd on carpet tracks so these cars never really resonated that much with me and found a new owner (my brother Neil).

However, I think the 1/10 touring cars are essential in order to understand written literature on the topic of vehicle physics due to R/C pan car mechanics not scaling to real life and therefore recommend Van Valkenburgh's "Race Car Engineering and Mechanics" as an accompanying text for TC racers. An experienced 2wd onroad racer will acknowledge the fact that 4WD TCs have a niche on asphalt and concrete outdoors and for this reason I hope to see the industry bring to market an adhesive vaneer/titanium plank or skidplate to protect the underside similar to that used in real motorsports.

My favorite car as a child growing up was the Lamborghini Countach and the SC63 themed paint job was completed only a couple of weeks prior to the the designer Marcello Gandini passing away, may he rest in peace.

Build Process Photos

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