2003 Ford Mustang Cobra Kenne Bell Twin Screw Supercharger - Mods For Mods Part 2
Power Curves--NA vs. Supercharged Cobra 4.6
The first modification performed to the Cobra motor supplied by Ford Racing actually reduced the power output. In an effort to see how much power the Eaton M112 supercharger was responsible for, we decided to run the supercharged Cobra motor in normally aspirated form. To do so, we replaced the Eaton supercharger and intake assembly with an intake manifold from a normally aspirated '01 4V Cobra. The intake bolted right in place without any problems. The stock '01 intake was run with the stock dual-blade throttle body, as well. Equipped with the '01 intake, the low-compression '03 Cobra produced 370 hp and 377 lb-ft of torque. This compares to a right-at-500-hp run in the same configuration (headers, electric water pump and optimized fuel and timing curves) with the Eaton M112 supercharger at nearly 9 psi of boost. View Related Article
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