Don Roy
November 1, 2006
Photos By: Jerry Heasley

Club members led Brian to Protech Performance in Austin to set up his AEM engine control unit. His original choice hadn't worked out well and he'd converted the control system from MAF-based to using a MAP (manifold absolute pressure) sensor. "I found that the car actually idled better, ran better, and even the time my blower belt had come apart I could still drive it NA with no problems." Still, there were other little bugs that needed sorting out. For example, his MSD distributor's output signal didn't work well with the AEM box. Switching back to a Ford OEM distributor fixed that issue. Ultimately, Protech got it sorted out, getting Brian into their shop within a few days and strapping the GT onto their dyno.

As far as future plans go, there's not much left to do on this GT. Still, Brian is looking to do the rear brake conversion to disks, so that he can match the 11-inch Power Slot rotors he's installed up front. He says his priority is, "to get the car to a point that I'm confident I can drive it any time I want and also go to the track whenever I want." Certainly, hot performance and subtle good looks make for a pretty Baby.

Specifications
Brian O'Quinn's 1991 GT

Engine
Ford 5-liter V8

Engine Modifications
Ford Motorsports E-303 camshaft, 1.6 Roller rocker arms, GT40 intake manifold, 42 lb. fuel injectors; Edelbrock Performer 5.0 aluminum cylinder heads; BBK 65mm throttle body, equal length shorty headers, 2.5-inch catted X-pipe; Flowmaster 40-Series 2-chamber mufflers; K&N air filter; Walbro 255 lph in-tank fuel pump; Aeromotive fuel pressure regulator; MSD Ignition coil, 6AL controller; Vortech S-Trim supercharger, 2.75-inch pulley; Cartech Turbo intercooler, 3-inch piping; Canton 8-quart oil pan with windage tray; ARP main bolts; FelPro head gaskets; Fluidyne aluminum radiator; Flex-A-Lite dual electric cooling fans; S.P.E.C. Stage III clutch; AEM 1400 ECU; Wideband O2 sensor; Converted from MAF (mass air flow) to MAP (manifold absolute pressure) intake sensing

Driveline
T-5 manual transmission, upgraded to Cobra Z specs; Steeda Tri-Ax shifter; Ford Motorsports aluminum driveshaft; 3.73:1 rear axle ratio

Numbers
Pump gas, 8 psi Boost: 480 WHP, 490 TQ

Interior / Exterior
Brian O'Quinn's 1991 GT

Chassis
Power Slot 11-inch front brake rotors

Exterior
Saleen rear wing

Interior
Auto Meter Ultra Lite gauges, including fuel pressure and boost pressure

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