Unleashing the Power: O.S. Engine Speed Tuned 21VZ-B V-Spec II World Edition
For those who are passionate about dominating the RC racing circuit, the O.S. Engine Speed Tuned 21VZ-B V-Spec II World Edition is a name synonymous with performance and reliability. This engine, renowned for its role in the 2008 World Championships, brings unparalleled power and efficiency to the 1/8 scale racing scene.
A Championship Legacy
The 21VZ-B V-Spec II is not just any engine; it's a piece of RC racing history. Its exceptional tuning and engineering were key to Atsushi Hara's victory at the Worlds in Charlotte, North Carolina. With extended run times between pit stops, this engine allowed Hara to outpace his competitors by making one less pit stop, a strategic advantage that contributed significantly to his win.
Precision Engineering for Superior Performance
Every component of the Speed Tuned 21VZ-B V-Spec II is crafted for excellence. The cooling head features 18 machined holes to reduce weight and enhance cooling efficiency. A hardened, chrome-plated 4-port liner and a specially coated crankshaft with a rear ceramic bearing minimize wear and friction. The engine's crankshaft is silicone filled, improving air and fuel flow, while tungsten weights ensure balance at high RPMs.
Carburetion and Tuning Flexibility
This engine comes equipped with a 21JS slide-valve carburetor, offering three different restrictor sizes (6 mm, 6.5 mm, and 7 mm) for precise tuning based on track conditions. Additionally, the inclusion of a P3 Ultra Hot Turbo plug ensures optimal ignition performance.
Specifications
- Displacement: .21 cu in (3.46 cc)
- Bore: 0.654 in (16.6 mm)
- Stroke: 0.63 in (16.0 mm)
- Practical rpm: 3,000-40,000
- Output: 2.5 hp @ 34,000 rpm
- Weight: 12.3 oz (349 g)
- Includes: 6 mm, 6.5 mm & 7 mm carb restrictors
The O.S. Engine Speed Tuned 21VZ-B V-Spec II World Edition is ideal for serious racers who demand top-tier performance and reliability. Its heritage and engineering make it a must-have for competitive RC enthusiasts.
