Steve Turner
Former Editor, 5.0 Mustang & Super Fords
January 15, 2014
Photos By: Brad Stillwell

Making that happen was the crew at JMS Racing ( in Converse, Texas. They selected the Pro EFI 128 engine management system for '03-'04 Mustangs, which is Pro EFI's ( only Ford application at the moment. To say this system offers a full complement of modern options would be an understatement. Its features include traction control, flex-fuel capabilities, wideband oxygen sensors, knock sensors, multiple fuel pump controls, and even a switch to toggle between calibrations for different octane levels.

JMS Racing tuned up the Pro EFI with calibrations for both low-boost/street and high-boost race scenarios with eye-watering results. "The car has traction control and it can put down 1,000-plus on the street," Nicholas enthused. "Yes, I repeat, you can make over 1,000 and keep it between the lines."

If that weren't impressive enough, Nicholas's Cobra can also seamlessly transition from E85, on which its biggest numbers are generated, and 93-octane pump gas. "The Pro EFI manages the air/fuel ratios and ethanol percentage with a GM Flex Fuel sensor," he explained. "So, you can put 93-octane pump gas on top of E85 with no changes. JMS tuned the car to adjust and run perfect. No matter the ethanol content, it runs the same tune."

As of this writing, Nicholas' best e.t. with only three passes with the Pro EFI system was a 9.85 at 144 mph. He hopes to better those quarter-mile times, while retaining the six-speed and IRS. Nicholas also wants to make a run a the Texas Mile's 200-mph club, so this bolt-ons to ballistic story isn't quite over yet ...

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Tech Specs: 2003 Cobra

Engine and Drivetrain

Block: Teksid aluminum 4.6 block
Crankshaft: HPP Racing Kellog stroker
Rods: Eagle H-beam
Pistons: Custom JE, HPP Racing-spec
Camshafts: HPP Racing-spec custom
Cylinder heads: Ported '03 Cobra Four-Valve aluminum
Intake manifold: Sullivan lower with CG Fabrication custom Big Mouth upper
Power Adder: Two Precision turbo 6766 turbos w/ CG Fabrication street kit feature 46mm Precision wastegates
Fuel system: Walbro 255-lph fuel pump w/ two in-line Walbro 450-lph pumps in Fore Innovations fuel hat, Sullivan fuel rails, Fuelab regulator, and 160-lb/hr Billet Atomizer injectors
Exhaust: CG Fabrication forward-facing headers w/ CG Fabrications custom, dual 3-in exhaust
Transmission: T-56 six-speed manual assembled by Nicholas Shortridge w/ solid keys and an iron 3-4 shift fork
Rearend: Stock IRS 8.8-in w/ 3.55 gears, Full Tilt Boogie Delrin bushing kit, Fore Innovations differential cover, and solid custom mounts


Engine management: Pro EFI 128 standalone tuned by JMS Racing (Converse, Texas)
Ignition: Stock w/ NGK B8EFs gapped tight
Gauges: Stock

Suspension and Chassis

Front suspension
K-member: UPR Products tubular
A-arms: UPR Products tubular
Struts: Strange 10-way adjustable
Springs: Maximum Motorsports coil-over
Brakes: Stock w/ Full Tilt Boogie two-piece rotors
Wheels: HRE 545 three-piece aluminum, 18x10-in (street) or Weld RT-S 15-in (drag)
Tires: Michelin Pilot 275/40-18 (street) or M&H radial (drag)

Rear suspension
Shocks: KYB adjustable
Springs: Maximum Motorsports coil-over
Control Arms: Stock
Brakes: Stock w/ Full Tilt Boogie two-piece rotors
Wheels: HRE 545 three-piece aluminum, 18x11-in (street) or Weld RT-S 15-in (drag)
Tires: Michelin Pilot 275/40-18 (street) or M&H radial (drag)

Horse Sense: Of the 13,476 Mustang Cobras built in the '03 model year, only 758 were built with Redfire Metallic paint and Graphite interiors like Nicholas'.