5.0 Mustang & Super FordsHow To Engine
Kenne Bell's 2.1-Liter, Twin-Screw Blowzilla - Return of Foxzilla
Installing Kenny Bell's Fox Supercharger was a fun process
On the Dyno
With Kenne Bell's 2.1-liter Blowzilla supercharger bolted to the stock 5.0 engine in Geoff Connors' super-clean '88 GT, we proceeded to the Dynojet chassis dyno at GTR High Performance to create general and "max-effort" calibrations. [Enter text here]
Ken Christley (technical director at Kenne Bell) handled manipulation of the 'Stang's EEC-IV processor, using SCT's tuning software to create a custom chip that contains calibrations for VP's MS109 race fuel, as well as California-standard 91-octane gas.
As the data shows, the 5.0 in Geoff's 100,000-mile GT responded favorably to forced induction, and we're impressed with the performance gains. However, we have to note that the 9 psi of boost achieved during the initial post-install dyno hit is a bit of an anomaly. Technically, with the 3-7/8-inch pulley we used, boost should be barely above 6 psi.
While the combination produced 312 hp, we believe that a restriction caused by the stock 5.0's camshaft is the reason for the abnormality in boost. Basically, the supercharged air is being restricted in the intake manifold, and essentially not getting into the cylinders.
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As we learned in a recent experiment (cylinder-head change) with Project T-top Coupe, while intake-air restrictions cause such boost increases, the engine isn't necessarily making more power. Thus the results of this experiment are great, considering the 5,500 rpm limit that the camshaft held us to.
Geoff's Mustang now has a considerable amount of power and especially rear-wheel torque, thanks to Blowzilla, and the cool thing is there's a ton of additional performance that can come from this blower package (it can be pullied for as much as 18 psi of boost), should Geoff decide to step up to a bigger, better engine in the future.