DYNO _Protek RC Samurai 321B CARBURETOR The Samurai has an all-aluminum body that uses a proven 3-needle design and a nylon isolator base to aid in combatting heat soak. Unique to the Samurai are the two included carb insert restrictors, which are elliptical in design and keyed to the carb body. This allows the 321B to further extend the fuel mileage without wasting that valuable commodity: fuel! 122 WWW.VRCMAG.COM Engines are pretty. carburetor CONNECTING ROD Seems like every manufacturer makes their connecting rods from the same print, however the quality is definitely there in the Samurai engine, it features a high-strength aluminum knife-edged conrod with precision brass bushings at each end and lubrication holes drilled in each end to supply the piston pin and crank pins with the necessary lubrication to achieve extremely high rpm. PISTON & SLEEVE I always go on about the importance of the aluminum’s quality and the quantity of silicon infused in the alloy, and I have to hand it to OS. As an engine manufacturer, they have it down to a science; they produce some of the highest quality pistons in the business. The Protek RC 321B engine is no exception, as it displays a traditional OS-quality piston that has been precision machined and ground to a perfect finish. The Samurai’s ABC cylinder shows equally impressive port machining and quality finish, using a 3-port configuration with an extra-wide exhaust. This configuration lends itself to the high mileage that today’s racers are demanding from their competition engines. 0° 90°
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