1999 Ford F-150 Lightning Kenne Bell Blower Swap
Eaton M112 vs. Autorotor(Kenne Bell Bolt-on Lightning Kit)
Want to add 50 extra horsepower to your supercharged 5.4 Lightning? That's exactly how much power we got when we installed the supercharger upgrade kit from Kenne Bell. The KB upgrade kit was designed to replace the factory Eaton M112 roots-style supercharger with the more-efficient twin-screw design from Autorotor. As is evident from the power production, the Autorotor offered a significant boost (excuse the pun) in performance. For this test, both the Eaton and Autorotor were installed using all of the stock hardware including the stock air box, MAF and inlet manifold. The twin-screw supercharger was even equipped with the same 3-inch blower pulley used on the Eaton it replaced. Even with the same crank and blower pulleys, the Autorotor increased the boost pressure from 9.3 psi to 13.2 psi. Interestingly enough, even with 4 additional pounds of boost, the charge temperature exiting the Autorotor (before the intercooler) was slightly lower than the Eaton at just 9.3 psi. Though a 50-horsepower gain was impressive, we were to find out that the Autorotor was just getting started. View Related Article
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