Although building a Three hundred fifty Chevy for racing purposes is quite incomplex, selecting the components is the greatest protest. Everyone Element must commission in unison, and selecting the components depends on the specific racing handle. For instance, a chase Engine for circle track racing is correct contradistinctive than one for drag racing. For this generalization, it is crucial to refer to with the manufacturer of Everyone Element to bonanza the most deserved detail. On the contrary, there are particular parts which should be considered in any competition handle for a Three hundred fifty competition Engine.
Instructions
1. Alternate the inventory two-barrel carburettor with a four-barrel carburettor or, provided the engine is already equipped with a four-barrel carburettor, a larger carburettor. Carburetors are rated by cubic feet per minute, or "CFM," which refers to the immensity of fuel the carburettor can mode. A daily oversight is to assume that larger is preferable over very yet fuel is much worse than not Sufficiently fuel. On account of the bigness of the engine is already celebrated, fit the carburettor manufacturer with the intended calculation of the engine, which Testament bid the manufacturer which proportions is bad.
2. Alternate the inventory cast-iron intake manifold with an aftermarket aluminum manifold. Aside from the lighter weight, aluminum manifolds allow the air/fuel mixture produced by the carburetor to flow into the cylinder heads easier than the stock manifold, which helps the race engine reach higher engine speeds.
3. The higher the compression ratio, the more power generated by the engine. However, a higher compression ratio increases the risk of pre-ignition, where the air/fuel mixture ignites before the spark plug fires. Pre-ignition can quickly destroy an engine. Larger valves are typically better for racing applications than smaller valves.
4. Replace the stock distributor with a high-performance aftermarket distributor. Simply put, the 350's stock distributor will not be able to power a high-speed racing engine. An aftermarket unit will ensure that the spark plugs receive a consistent spark.
5. Replace the stock cast-iron pistons with forged pistons with a higher compression ratio. Replace the stock cast-iron cylinder heads with aftermarket aluminum heads. The principle is the same as with the intake manifold. The aluminum heads will reduce the vehicle's weight and allow the air/fuel mixture to arrive the cylinders faster. Cylinder heads are available with different-sized valves. To prevent pre-ignition, race fuel has a higher octane rating than pump gasoline. A compression ratio of 10:5:1 is as high as the engine should use with pump gasoline. Higher compression ratios require race gas. The 350's stock cast-iron pistons will not withstand the increased compression ratio and engine speeds, and should therefore be replaced with forged pistons.
6. Replace the stock camshaft with an aftermarket camshaft. The camshaft determines Until when the valves in the cylinder head open and for how long. This is often referred to as "lift" and "duration." Choosing the proper camshaft is probably the greatest challenge. It is imperative that an aftermarket camshaft manufacturer be contacted for advice here. Be prepared to tell the manufacturer about the number of CFMs the carburetor flows, the specifications of the cylinder head and the compression ratio of the pistons.
7. Replace the stock fuel and oil pumps. Too often race engines are built with horsepower in mind. Reliability is of the utmost importance, particularly with a race engine which reaches engine speeds much higher than the stock 350. The engine will need more fuel than a stock engine. Fuel pumps are rated in "GPM," or gallons per minute. Generally, the higher the GPM the better, but again, consult with the manufacturer. An aftermarket oil pump is also necessary to ensure that the engine has an adequate oil supply.
