1991 GMC Syclone - All-Wheel Dream at Automotive.com
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Walbro Fuel Pump & Magnaflow Mufflers

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1991 GMC Syclone - All-Wheel Dream
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1991 GMC Syclone - All-Wheel Dream


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DATA FILE
Truck:1991 GMC Syclone
Owner: Doug Aber
Block: LS2, 364ci
Compression ratio: 11.5:1
Heads: LS6, ported by Total Engine Airflow, 2.02 intake, 1.60 exhaust valves
Cam: Comp Cams hydraulic roller, 226/228 duration at .050, .585/.588-inch lift, 114LSA
Pushrods: Comp Cams 7.400-inch, chrome moly
Rocker arms: Stock LS2, 1.7 ratio
Pistons: Stock, hypereutectic
Rings: Stock
Crankshaft: Stock, nodular iron
Rods: Stock, powdered metal
Throttle body: BlueMaxx 90mm
Fuel injectors: FAST 36lb/hr
Fuel pump: Walbro 225lph
Ignition: Stock LS2, coil on plug
Engine management: LS1 PCM, tuned by Vengeance Racing
Exhaust system: Vengeance custom 1.75-inch long-tube headers, 3-inch dual exhaust with Magnaflow mufflers
Transmission: 4L60E, built by RPM Transmissions
Torque converter: Precision Industries Vigilante, 3200-stall
Driveshafts: Stock rear, modified front
Front suspension: Stock control arms and springs, Koni shocks
Rear suspension: Stock leaf springs, Koni shocks
Rear end: Stock 10-bolt, 3.73 gear
Brakes: C5 Z06 front, stock rear
Wheels: Custom 17x9.5 front and rear
Front tires: BFGoodrich KDW, 275/40/17
Rear tires: BFGoodrich KDW, 275/40/17
Fuel octane: 93
Best ET/mph: 11.37 at 117
Best 60-ft. time: 1.72
Current mileage: 87,871

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