Since the first combustion engine was built, we have been striving to improve its performance. To help understand the simplicity of a combustion engine, we need to think of it as an air pump. To increase the output of an air pump, it needs to be less restrictive when the air is going in and the exhaust exiting. Restriction is the major contributor to handicapping an engine's performance.
| FOUR-STROKE ENGINE: |
| 1. Intake Stroke | (Intake Valve Open) |
| 2.Compression Stroke | (Both Valves Closed) |
| 3.Power Stroke | (Both Valves Closed) |
| 4.Exhaust Stroke | (Exhaust Valve Open) |
| Four Strokes = 1 cycle of the engine. |
EZ Bolt-On Horsepower Components:1. carburetor, supercharger,2. intake manifold single-plane, dual plane, hi-rise 3. carburetor spacers4. fuel injection, throttle body, multi-port injection5. cylinder heads, cast-iron, aluminum6. rocker arms 1.5 - 1.87. camshaft8. exhaust manifold, tube headers, mufflers9. electronic ignition10. flex fan, auxiliary electric fan
What Makes It GoCarburetors have been the combustion engine's air/fuel distribution center for decades, controlling the air/fuel mixture on demand. As air enters the carburetor or carburetors-atop the intake manifold-the throttle plates are opened at the bottom of the carburetor; the engine's internal suction is created when the piston travels down the cylinder during the intake stroke. The suction draws the air/fuel mixture down into the intake manifold. The air/fuel mixture tumbles and swirls down the textured, equal-length runners of the intake manifold. The internal size and shape of the runners will control the air/fuel flow and velocity as it is directed to the intake valve ports, located in the cylinder head or heads. As the cylinder head intake valves open, the air/fuel mixture is drawn into the combustion chambers during the piston's down stroke. When the piston reaches the end of its intake stroke-known as bottom dead center (BDC)-the intake valve is closed. As the piston begins to travel upward during the compression stroke, the air/fuel molecules are compressed, and when the piston hits the top of its stroke-known as top dead center (TDC)-the air/fuel molecules are compressed to their maximum. The spark plug delivers a high-energy spark, igniting an explosion inside the combustion chamber, forcing the piston to travel down the cylinder producing a power stroke, which rotates the crankshaft. With the intake valve closed as the piston begins its travel up inside the cylinder the exhaust gases are compressed. The exhaust valve is then opened allowing the cylinder full of exhaust gases to be purged out of the cylinder and into the exhaust manifold or headers.