Throwdown Holley LS Fest 2012 - 2000 GMC Sierra

8th Place - Junkyard Dog

Patrick McCarthy
May 6, 2013
Photographers: Henry De Kuyper, Tommy Lee Byrd, Truckin Staff
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8th Place
When it comes to building custom trucks, most owners try for a consistent and unified style with two or three colors. Chris Volponi went in the opposite direction, and purposely built his truck with panels in nearly every factory GM color, earning it the nickname "the clown truck". However, once it hit the track, this 650hp turbocharged monster's performance was no joke. With a gargantuan 88mm turbo setup and built LS1, it sports a surprising amount of custom fabrication under its multicolored panels. The Sierra placed midpack in autocross, slalom, and speed stop, but Chris dominated the dragstrip with consistent 11-second runs and the fastest trap and reaction times. This was enough to earn an Eighth Place slot, a position that Chris intends to improve upon at next year's THROWDOWN.
Year/Make/Model:
2000 GMC Sierra
Owner and City/State:
Chris Volponi Pittsburgh, Pennsylvania
Engine
Type: 5.7L LS1, forged pistons and rods, ARP main and head studs
Heads: 6.0L LQ9 heads
Cam: LS6 from a ZO6
Induction: Precision PT88 88mm turbo at 12psi, 1st-Try Engineering custom turbo piping, high-flow air filter
Exhaust: 1st-Try Engineering custom 4-inch exhaust with 4-inch diesel muffler
Cooling: 1st-Try Engineering custom air-to-air intercooler setup
Fuel System: Dual Walbro fuel pumps, 65 lph injectors
Ignition: Stock coil-on-plug
Engine Management: Factory ECM tuned by FJ Performance
Output: 650 whp (est)
Built by: Chris Volponi/The Auto House
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Drivetrain
Transmission: Built 4L80E with Jake's Performance shift kit
Rearend: 10-bolt with 3.73 gears, Detroit TruTrac, Yukon axles, welded axle tubes
Chassis
Front suspension: McGaughys 2-inch drop spindles, McGaughys 2-inch lowering springs, Belltech Street Performance shocks
Rear suspension: McGaughys flip kit, weld-in C-notch, Tahoe rear sway bar with custom-fabricated mounts, Caltrac traction bars
Brakes: Stock with power Hydroboost conversion
Wheels & Tires
Wheels: Cadillac Escalade 18x8
Tires: Nitto 555R 295/45R18, slicks for dragstrip
AUTOCROSS TIME: 50.47 sec
QUARTER-MILE TIME: 11.58 @ 123.63 mph
(Fastest ET, reaction, and trap speed)
SPEED STOP TIME: 9.68 sec
SLALOM TIME: 9.29 sec
SHOW & SHINE: No points earned
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Special Thanks:
The Auto House, Jeff Oppenheim at 1st-Try Engineering, Hollywood Graphixxx
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