2012 THROWDOWN West Coast - 2004 Chevy Silverado SS

Street Lethal

Dan Ward
Nov 1, 2012
Photographers: Truckin Staff, Camaro Performers Staff
Photo 2/4   |   2004 Chevy Silverado lsx Engine Twin Turbo 427
Street Lethal
Street Class
Place: 1st
We hear the term "street legal" thrown around way too much these days, as GM LS engines and Ford modular engines have made four-digit horsepower levels a streetable achievement. For Chase Groce of Riverside, California, a more appropriate term for his '04 Silverado SS would be street lethal. Here are the hard numbers: twin-turbo LSX427, 1,100 hp, and power to all four tires. Those figures are enough to make you flip right to the stats page and see how the SS performed, but there's no need to. Chase won the Street Class with more than sheer brute force, he did so by knowing his truck and driving it at a high evel. Don't get us wrong, brute force did play a role, as we nearly forgot how to effectively communicate when the quarter-mile timer went off at just 10.98 seconds. Our test track is an old, decommissioned military airfield, and to say the conditions are not up to NHRA standards would be a laughable understatement. Our point is, Chase's SS is faster than Usain Bolt on greased rollerblades. Combine the killer speed with the imposing looks of the Patrick Guyton real-fire flames, and you've got yourself one hot machine. The added style points helped edge out Hickman for the title of THROWDOWN, presented by Airaid Street Class Champion. The First Place finish did come with a cost, as the Silverado left our track on top of a trailer. Pistons 7 and 8 weren't really happy, and the trans was smoking by day end. Going all-out, all day long, Chase had these words to say about THROWDOWN, "It's the most fun I've had in years; it was very well executed, and I wouldn't change much for the years to come."
Photo 3/4   |   2004 Chevy Silverado chase Groce
At A Glance:
Chase Groce • 2004 Chevrolet Silverado SS
Engine: 427ci LSX V-8, twin 67mm Garrett turbochargers running 15 psi of boost, ported and polished aluminum heads, Comp Cams .600 lift, custom intake, custom tubular stainless headers, dual 3-inch Magnaflow exhaust, 120-pound injectors, studded main caps
Transmission: 4L80-E, fully built with Circle D 3,000-stall converter, lengthened steel front driveshaft, shortened aluminum rear driveshaft
Rearend: 8.6-inch GM with 3.73 Detroit Tru Trac
AWHP: 1,100 (custom tuned by owner)
Suspension: C-notch, QA1 springs, QA1 double-adjustable shocks (custom-mounted in rear), rear drop hangers and shackles
Brakes: Baer six-piston front with 15-inch rotors, Baer two-piston rear with 14-inch rotors, stainless lines
Wheels/Tires: 22x10-inch Motoforge Sport Truck wheels with 305/40R22 Nitto NT-420S tires
Weight: 5200 lbs
Pros: Ludicrous horsepower, excellent traction with AWD
Cons: The power proved to be too much for the LSX's internals
Slalom Time: 7.81
¼-Mile Time: 0.98
Stop Box Time: 11.34
Road Course Time: 2:02.09
Photo 4/4   |   2004 Chevy Silverado motoforge Sport Truck Wheels



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