Reds Racing 521 GTS Gen2 engine

Reds Racing have introduced the new 521 GTS Gen2 engine specifically developed for 1:8 nitro GT class. The new 521 GTS Gen2 engine features high power, tuning stability and great fuel mileage. Combined with specific technical changes at the carburettor, combustion chamber and front bearing, this 5 port engine features higher power and better fuel efficiency compared to any other engine. They have developed 3 different combinations for this engine: 521 GTS with steel bearing, 521 GTS with ceramic bearing and 521 GTS Pro Tuned by Mario Rossi with ceramic bearing. You can order all of them with or without pre break-in service.

Specifications
Category: 1/8 GT
Displacement [cm^3]: 3.5
Bore [mm]: 16.05
Stroke [mm] 17.3
Inlet ports: 5
Outlet ports: 3
Crankshaft: Steel balanced
Backplate: aluminum
Front ball bearing: 7x19x6 rubber seal
Rear ball bearing: 14×25.4×6 Swiss made ceramic or steel
Carburetor diameter [mm]: 7.0 stock (7.5, 8.0, 8.5 and 9 optional)
Carburetor: REDS CG3 aluminum (3 needles)
Weight [g]: 350
Engine temperature: 110-130°C (depending on air temperature)
Recommended Glow plug: REDS TS7
Recommended pipe: REDS 2113 + S
Recommended fuel: 16-25% nitro, 8-10% oil
Break-in fuel: 12% oil

Source: Reds Racing [reds-racing.com]