Supercharger Shootout - Brothers In Arms
KB SC GT500-20 PSI
What could be better than combining a Four-Valve motor with efficient boost from a twin-screw supercharger? That's easy--combining an even bigger Four-Valve motor with the blower. If you review the graphs of the previous 4.6L motors, you'll see that torque production exceeded 500 lb-ft as low as 2,300 rpm (2,400 rpm for the Terminator). By contrast, torque production from this larger 5.4L motor exceeded 600 lb-ft at the same engine speed, continuing to do so to nearly 6,500 rpm. With a peak torque reading of 684 lb-ft, the 5.4L clearly demonstrated its superiority. Like the previous mod motors, the GT500 clearly was not finished making power at 6,200 rpm, so there's more power to be had from this combination by extending the engine speed. Just remember that the piston speed of the 5.4L is dramatically higher than the smaller 4.6L, so care must be exercised when combining high boost and high rpm. View Related Article
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