O.S. Speed B21 AD3 Adam Drake 3 Competition .21 Nitro Engine w/2100SC Pipe & Adam Drake Break In

The O.S. Speed B21 AD3 Adam Drake 3 Competition .21 Nitro Engine with  2100SC Pipe is the latest evolution of this potent racing engine.  Designed in collaboration with the legendary Adam Drake this AD3 edition  features several updates and improvements over the already competitive  B21 engine platform. The AD3 uses an updated crankcase inner design for  linear power making the transition from low to middle to high speeds  almost seamless. Adding to this is an updated backplate with a steel  lining reducing resistance and aiding in not only extra power but better  fuel mileage. Helping to keep weight in check a freshly designed  cooling head features a 3mm lower height and is 14g lighter overall  lowering the engine's center of gravity and shedding weight in a  critical area. This combo includes a 2100SC Pipe and 75mm manifold  recommended for buggy racing applications.   Plus, these engines have been broken in by Adam himself using Adam's  "EBIS" engine break in services! Now, the same "Oil Bath" break in  service trusted by Ty Tessmann, Ryan Maifield, Robert Battle, Spencer  Rivkin, Mike Truhe, and many others is now available to you, performed  with the knowledge and precision that has made The Drake a legend in RC  racing.   Featuring a semi-long stroke configuration, this engine boasts a DLC  crankshaft with larger double tungsten counterweights and a unique  cylinder design that’s exclusive to the Drake edition engines. These  changes will provide smoother low end power and more overall torque than  the previous model. The AD3 is an excellent choice for both buggy and  truck racing as it provides a linear power band, exceptional fuel  mileage and tons of overall power.    Features:    Adam Drake’s unique engine specs not used on any other O.S. Speed engine Engine/pipe combo recommended for buggy racing Updated cooling head; 3mm lower height for low gravity and 14g lighter. Black/blue double anodized head. Back plate with steel lining like B2104 for friction resistance Updated crankcase inner design for linear power transition from low–middle–high speed Redesigned cylinder liner with optimized porting DLC crankshaft with larger double tungsten counterweight Semi-long stroke configuration Blue anodized 6.5 and 7.0 mm carburetor reducers Ceramic rear bearing 21J carburetor O.S.SPEED P3 gold plug, great for medium and low speed torque performance, is also included Specifications:  Bore: 16.4mm / 0.646 in.  Cylinders: Single  Displacement: 3.49cc / 0.213 cu.in.  Engine (Only) Weight: 350g / 12.35oz  Power Type: Glow  Horsepower: 2.61 HP / 34,000 rpm  RPM Range: 4,000 - 42,000  Stroke: 16.55 mm / 0.652 in. output   Includes:     (1) AD3 Engine with Adam Drake Break-In (1) 2100SC Pipe and 75mm manifold (1) Engine to Header Gasket (1) P3 Gold plug (1) 21J carburetor Blue anodized 6.5 and 7.0 mm carburetor reducers