489" Supercharged FE Horsepower, Torque, Airflow, and Boost

The top graph at right plots horsepower, torque, airflow, and boost from a 489" FE fitted with a Vortech VR-1 YSi supercharger and an air to water intercooler. The combination generated around 930 horsepower at 6000 RPM in this iteration, and was limited in power due to a slipping serpentine belt that drove the supercharger. This multi-ribbed belt still managed to transfer over 100 horsepower from the crank to the supercharger pulley, but after around 10 or 11 pounds of boost it could no longer keep up.

The engine was later fitted with a toothed belt to eliminate the belt slippage issue. The result of this change was 15 pounds of boost and, as shown on the graph at lower right, over 1000 horsepower.

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