O.S. Engines Speed B21 Adam Drake 3 .21 Buggy Engine with T-2090 Pipe

OSMG1CJ01 

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.

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

(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