.21 Off-road Nitro Engines REDS Racing New 521 Sport Off-road Nitro engine juin 7, 2021 by Chris Leave a Comment REDS Racing have introduced their new 521 Sport Off-road engine. This new engine belongs to Reds S LINE together with 721 Scuderia, Superveloce and Corsa, a new range of engines produced with different materials, from different suppliers and with new technologies. All assembled in-house and 100% made in Italy. Shopping! Wartelle Shop Shopping! Donuts Racing Shopping! RC Team Shopping! Absolute Hobbyz The new engine features high reliability, tuning stability and fuel mileage. Combined with specific technical changes in the porting and new materials, this 5 port engine features good power and fuel efficiency. 521 Sport guarantees excellent performance at a reasonable price. 521 Sport engine has been provided with the same aluminum carburetor as 721 engines to guarantee reliability and tuning stability. REDS Racing 521 Sport features a new and unique high stiffness crankcase design. It is all new materials and casting technology. The engine is produced with pressure die casting, this is a very high quality process. Previous generation R line crankcase was with gravity casting. Every single engine is hand inspected and compression checked inside REDS Racing headquarters by Mario Rossi to achieve the highest quality standards. REDS Racing advise using REDS 2143 pipe and M manifold. Specifications: Category: 1/8 Buggy and TruggyDisplacement [cm^3]: 3,5Bore [mm]: 16,24Stroke [mm]: 16,8Inlet ports: 5Outlet ports: 1Crankshaft: carbon steelBackplate: aluminumFront ball bearing: 7x19x6 rubber seal Rear ball bearing: 14×25,4×6 Swiss made steelCarburetor diameter [mm]: 7.0 stock (6.0, 6.5, 7.5 and 8.0 optional)Carburetor: VCX2-A aluminum, 2 needles, GEN2Weight [g]: 345Fuel consumption: >9:00 minEngine temperature: 110-130°C (depending on air temperature)Recommended Glow plug: REDS TS3Recommended pipe: REDS 2143 + M Manifold or 2143 X-One pipeRecommended fuel: 25-30% nitro, 8-10% oilBreak-in fuel: 12% oil Source: REDS Racing PartagezTweetezEnregistrer0 PartagesAbout ChrisFounder of circusrc.com, journalist & photographer in the RC world for several years, Chris is passionate about RC, racing and technique. Whether in France or in the world, he is trying to bring high-quality information and photos for enthusiasts... and make you want to join the world of RC!