KJ Jonesx
February 15, 2012
Photos By: KJ Jones

XFI 2.0

Engines in our T-top project car have always been commanded by FAST's XFI fuel-injection system. We've had great success using XFI for engine management, and consider it one of the best stand-alone EFI units for aggressive street/'strip Mustangs.

During the coupe's rebuilding period, we received word that XFI was also being revamped. And, of course, we immediately had interest in trying it with our new engine and intercooled Paxton Novi superchargers (2000 and 2500).

The new XFI, Version 2.0, retains many of the features of the first-gen system. However, engineers at FAST and tuning consultant Brian Macy of Horsepower Connection have brainstormed and developed quite a few new functions for the new ECU. Features such as Intelligent Traction Control and Self Learning are among the new additions to XFI, which give both amateur and experienced tuners the ability to dial in Mustangs for just about any driving condition.

We sent the 'Stang's original XFI processor back to FAST, and a few weeks later received the upgraded 2.0 ECU (FAST performs the hardware upgrade for $99.95). We were fortunate enough to catch up with Brian Macy for help with nailing down calibrations for our Mustang. (Brian travels all over the country giving classroom lectures, tuning in dyno sessions, and consulting with FAST on XFI features.)

Our tuning with XFI 2.0 took place over the course of two days in your tech editor's driveway, where preliminary parameters were established. It continued in the dyno cell at Extreme Automotive, where we set out on our mission to make big steam.

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