Ford Modular Motor Forced Induction Testing - Force-Fed Foursome

600hp 4.6L Vortech Supercharger (12 psi)

Things start to get serious when you try to exceed 600 hp from a Two-Valve 4.6L. Though our combination was sporting nothing more than the factory '98 short-block, running on the engine dyno gave us complete control over every variable, making this level of power production safer than it might be on the street. Naturally, this high-compression, relatively high-boost motor was run with 100-octane Rockett Brand racing fuel. As with all of our test motors, the crankcase was also filled with Lucas synthetic (5W-30) oil. For this test with the Vortech T-Trim blower, we relied on the same test motor as the 500hp Kenne Bell combination. The '98 Two-Valve motor was equipped with the CNC-ported PI heads from Total Engine Airflow, XE274H (non-PI) cams, and factory PI intake. Running a 75mm Accufab throttle body and Hooker headers, the 4.6L produced 407 hp and 393 lb-ft of torque. Rather than run the standard S-trim supercharger, we stepped up to the T-Trim head unit. Vortech also supplied one of its charge cooler systems to help lower the inlet charge temperature, a necessity with our static compression exceeding 10.0:1. Running 20 degrees of timing and a 3.33-inch blower pulley, the Vortech T-Trim pumped out 12 psi of boost, which helped the modified 4.6L produce 654 hp and 547 lb-ft of torque.