KJ Jones
May 24, 2011

With fuel-economy stats of 30 mpg, the only thing you can call Ford's new 3.7-liter bullet is impressive, especially after watching the powerplant throw down roughly 260 naturally aspirated horsepower at the feet of a new 'Stang. Take a second to put this in perspectiveùthis tiny engine rocks harder at the crank or wheels than any bone-stock pushrod 5.0-liter, and even better at the feet than any of the factory Two-Valve, 4.6-liter V-8 engines that powered Mustang GTs from 1996 to 2004. Seriously, the crank horsepower of this new six-banger (305 hp) is on-par with that of '03-'04 Mach 1sùand the cost to have it is considerably less!

As the dyno results show, adding the intercooled P-1SC and ProCharger's custom calibration makes an instant and big difference in the 3.7 power and torque sweeps. We followed the dyno session with a few miles of cruising with the 415hp setup installed (open-air filter and calibration), which put a stamp of confirmation on this deal. The supercharger's helical-cut gears are deceptively quiet, and low-speed driveability remains smooth and stock-like. Upstairs is another story, as boost starts doing its thing right around 3,500 rpm and continues straight up to 6,500 rpm, which allows a 3.31-geared, six-speed V-6 Pony to sprint up to 130 mph with ease.

Add a set of 3.73s to this package, and there's really only one piece of advice we can offer those who believe a V-8 'Stang is the only way to go: Don't be fooled, son! For the saved cash that comes with buying a '11 V-6 Mustang (price, fuel economy, lower insurance rate), throwing five Gs at it for stealth performance like this is a true bargain.

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