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.
| Specs: 600 hp |
| Block: | Stock '98 4.6L Two-Valve iron |
| Crank: | Stock '98 4.6L Two-Valve iron (stock stroke) |
| Rods: | Stock '98 4.6L Two-Valve iron |
| Pistons: | Stock '98 4.6L Two-Valve iron |
| Compression: | 10.6:1 |
| Cylinder Heads: | TEA CNC-ported PI |
| Cams: | Comp Cams XE274H |
| Intake Manifold: | '00 4.6L Two-Valve PI |
| Throttle Body: | Accufab 75mm (both N/A and SC) |
| Inlet Elbow: | Accufab |
| Injectors: | 36 lb N/A, 65 lbs SC |
| Management System: | FAST |
| Headers: | Hooker 1-5/8 in |
| Exhaust: | 18-in collector extension |
| Fuel: | 91- and 100-octane Rockett Brand racing fuel |
| Blower: | Vortech T-Trim |
| Intercooler: | Vortech air-to-water (ambient dyno water used for testing) |
| Boost: | 12 psi (at power peak) |