How to Create a Design Checklist for Car Supercharger Modifications
A supercharger forces more air into an engine, increasing its fuel consumption and horsepower. Several modifications need to be made to a car to take advantage of this increase in power. The following steps will show what to include on a checklist of supercharger modifications.
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Instructions
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Choose the supercharger type based on the engine and purpose. Centrifugal superchargers have more power at the top end of the revolutions per minute (RPM) range and are preferred for customized engines and racing. Positive flow superchargers have more power in the low- to mid-RPM range and are more reliable, making them better for the street.
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Increase the rear axle gear ratio. This should be considered a required modification as supercharged engines need higher RPMs to stay in the "sweet spot" of the powerband. A stock rear axle ratio of 3.08:1 is high, whereas supercharged engines benefit from a rear axle ratio of at least 4.1:1.
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Replace the stock cylinders. Short head cylinders are a relatively cheap way of allowing the engine to use the increased air provided by a supercharged engine. Long tube cylinders are a more difficult and expensive modification but will provide much more horsepower than short cylinders.
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Install a short-throw shifter. This reduces the distance and therefore the time required to shift gears on a car with standard transmission.
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Use an aluminum drive shaft. This is a common modification in supercharged engines because it reduces the drive shaft's inertia, allowing the engine to increase RPMs more rapidly.
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