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GT Pro Spec Porsche Cup R/C Racing

Banner Porsche Cup

Tamiya Porsche Cup

Tamiya USA brings the long awaited and requested Porsche Cup R/C class to fans of Tamiya spec class R/C racing. The purpose of the class is to bring new and existing R/C racing fans a realistic, affordable, and fair way to race at local on-road racetracks across the United States. When Tamya introduced the first Euro Truck kit in 2016, it quickly became a vastly popular box stock class, not just for Tamiya’s TCS racing series, but also for weekly hobby shop race programs.

Tamiya Porsche Cup is intended to usher in the next fun thing that all race programs can integrate. The goal is to keep R/C racing fun, attract new fans, keep it budget friendly, and promote realistic Porsche race cars seen across the globe, like the Porsche 911 GT3 and 911 GT3 R!

The class rules are a mirror image of the popular Tamiya Championship Series (TCS) GT-Pro Spec class. The main difference is the exclusive use of the newly announced Porsche GT3 R (992) kit and the previously released 911 GT3 (992). The legal chassis, for the class, revolves around the TT-02 platform, a beginner friendly and budget-oriented machine. Additionally, the Hobbywing HW XR10 Justock G3S ESC and Hobbywing HW JS5 21.5 G2.1 or 17.5 G2.1 motor are the spec electronics to keep blinky-mode and motor wind shenanigans to an easily manageable process for tech-inspectors across the country.

While this is not a TCS class, the GT-Pro spec class is already in place and the most popular class in TCS, this class is meant to stimulate interest in Tamiya spec R/C racing for hobby shops, R/C tracks and R/C clubs that don’t currently run a TCS regional race. It’s meant to breathe new life into their race program with a realistic and budget friendly class.

Below are the rules:

Rules 2

About the class:

The GT Pro Spec -Porsche Cup class is a variation of the popular GT Pro Spec class run at official TCS regional races. This variant further locks in the popular class by using Hobbywing electronics that allows organizers to quickly check for rules compliance. Additionally, the use of Tamiya’s popular new Porsche 911 GT3 bodies keeps the aero guesswork at a minimum, plus it looks cool seeing Porsche 911 GT3 cars racing around the racetrack together! This is a single-make manufacturer class designed for any R/C racing club or hobby shop with a racing program to run. It’s designed to bring in new racing hobbyists while also offering veterans a budget-friendly alternative.

The Porsche 911 GT3 (992) body and new 911 GT3 R (992) must be used with the TT-02 chassis. The TT-02 chassis must be configured to 251mm (Short-size wheelbase spec).

Recommended Minimum Skill level: Intermediate to Advanced.

1.1 Legal chassis platform: TT-02, TT-02R, TT-02RR kits only. Note: TT-02 Type S kits are not legal for this class, nor TT-02 Type S specific suspension Hop-Ups. NOTE: The TT-02 chassis must be configured to 251mm (Short-size wheelbase spec).

1.2 Hop-Up Options: Any TT-02 Hop-Up Option is allowed with the 2 exceptions listed in RED: A. No aluminum body shocks. B. No carbon shock towers.

1.3 Shock Dampers: The only Hop-Up Option shock damper allowed is the Tamiya CVA plastic shock unit. (Item 50746)

1.4 Damper Springs: You may only use the kit supplied, 5 coil, or 7 coil, chrome spring that’s included in the CVA shock unit set, or item 53440 RC On-Road Spring Set (Hard). (RECOMMEDNED) These springs are color coded blue, red, yellow, and white, in the package for easy identification.

1.5 Spur Gears allowed: Tamiya TT-02 stock, and TT-02 Tamiya speed-tuned spur gears are allowed. TT-02 Gears: Stock-70T, Speed-Tuned-68T, and 64T.

1.6 Pinion Gears allowed: You may only use the pinion gear ratio options shown in the TT-02 kit, or the gear chart found in the optional speed-tuned gear set. NOTE: Finding ways to exceed the maximum gear ratio, shown in the manual charts, is not allowed. Maximum gear ratio from the speed tuned gear set: 5.74:1 (64T Spur-29T Pinion)

1.7 Tires: R/C clubs and tracks should pick their favorite touring car spec tire that’s best for their race program.

1.8 SPEC Motor rules: Participants in this class must use the HOBBYWING HW JS6 21.5 G2.1 FTM motor. (FIXED TIMING MOTOR) HW Item# 30408012 (Recommended for SMALL TRACKS) or JS6 17.5 G2.1 FTM HW Item# 30408011 (Recommended for LARGER TRACKS)

1.9 SPEC ESC rules: Participants in this class must use the HOBBYWING XERUN XR10 JUSTOCK G3S ESC HW item# 30112005

1.10 ESC MOTOR RPM LIMIT: The Hobbywing ESC-RPM LIMIT must be set at 18,000. (for 21.5 FTM motors) and 23,000 (for 17.5 FTM motors) LED BLINKY SEQUENCE: 21.5 FTM RPM limit is GREEN 2 flashes RED 8 flashes. The LED BLINKY SEQUENCE: 17.5 FTM RPM limit is GREEN 2 flashes RED 3 flashes.

1.11 Body: The GT Pro Spec Porsche Cup bodies that may be used is the 911 GT3 (992) (Item 51705) or 911 GT3 R (992) (item 51752)

1.12 Wings: You may use the stock wing from the body set, or you may use Hop-Up-Option wing; item 22015 Racing Wing Set 3 Carbon Pattern This is the only optional wing allowed. Note: Tamiya Aluminum Hop-Up-Option wing mounts are permitted. Items: 54773 RC Aluminum Wing Stay 2, and 54510 RC Aluminum Wing Stay

1.13 Wheel hubs: 4mm, 5mm and 6mm wheel hex hubs only. TT-02 kits include 9mm plastic hex hubs. They are not allowed.

1.14 Minimum weight: 1400 grams.

1.15 Recommended Hop-Up-Options: Various Hop-Up Option may be used, but you only need to consider the following:

  • Ball Bearing set: (item 54476) highly recommended.
  • Speed Tuned Gear Set: (item 54500) highly recommended.
  • Aluminum motor mount: (item 54558) highly recommended.
  • Plastic Oil-filled dampers: (items 50746) highly recommended
  • Aluminum Prop-shaft: (item 54501)
  • TT02 Alum Propeller Joint (item 54502 or 22066)
  • Steering Turn Buckle set: (item 53662).
  • Toe-In Rear-Uprights (TT-02 item 54549/2.5 degree & 54733/3.0 degree)
  • RC On-Road Spring Set (Hard) (item 53440) highly recommended!
  • Oil Gear Differential Unit (item 54875) or Oil Gear Differential Unit (item 22049)
  • Universal drive shaft set (item 53792 for Oil Differential Unit 54875)
  • Universal drive shaft set (item 51700, 51444, and 54623 for Oil Differential Unit 22049)
  • Adjustable Upper Arm Set (item 54874)

*FINAL THOUGHTS Race directors and racing hobbyists may wonder, why not allow ANY AFTERMARKET OPTION PART for the class? Simply, we believe the moment the class opens to any option part made by any manufacturer, the class becomes an arms race and more costly than it needs to be. The intent of the class is to keep things fun and reasonably affordable, hence SPEC CLASS RACING.

Porsche Cars

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