28 Two Valves Per Cylinder Terror
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4.6L NA vs. Kenne Bell Mammoth (10.7 psi). Adding the Kenne Bell Mammoth supercharger kit offered substantial power gains, increasing the power output from 348 hp and 349 lb-ft (with PI intake) to 552 hp and 482 lb-ft of torque at a peak boost of 10.7 psi. For this first test, we equipped the supercharger with a massive 4.25-inch blower pulley to work with the 7.5-inch crank pulley. Torque production exceeded 450 lb-ft for most of the curve, but we were just getting started. View Related Article
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