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2006 Chevrolet Silverado 2500HD 6.6l Duramax - Diesel Power Challenge 2014 Competitor

Jun 26, 2014
Photographers: Diesel Power Staff
If there was one truck we were more curious about than any of the others, it would be Shilo Ellingford's blue shortbed 2006 Chevrolet Silverado 2500HD. After being voted in last year and failing to make the competition—thanks to a badly leaking CP3 followed by catastrophic transmission failure—we weren't even sure if he'd enter again. But enter he did and, once again, the readers voted to see what this mean little truck could do.
Let's address the elephant in the room right off the bat. You are not seeing things; this single-cab Silverado 2500HD had the factory longbed removed, frame shortened, and a shortbed installed. Whether the shorter wheelbase will be a detriment to his performance in our competition is yet to be seen, but the new stance gives a downright mean look, and it shaves off weight to boot.
Photo 2/10   |   Shilo Ellingford 2006 Chevrolet Silverado 2500HD Duramax Rear
Turning our attention under the hood, we find what really matters: a fully built 6.6L Duramax V-8. This pavement-pounding engine is outfitted with Carrillo pistons and rods, a custom-ground camshaft, valves and headwork by Industrial Injection, NGM valvesprings and pushrods, and ARP head studs. A pair of Industrial Injection CP3s, which feeds a set of gargantuan 400-percent-over injectors, handles fueling. Making sure there's never a shortage of number 2 is a pair of FASS Titanium 250-gph lift pumps, which draw from a 16-gallon fuel cell. Controlling engine operation is EFILive tuning performed by Starlight Diesel.
Pumping air into the engine is a pair of Garrett turbochargers. Plumbed together with a Custom Auto Diesel Performance compound turbo kit is an 80mm GTX45R and 88mm GTX55R. Residing where the radiator once lived is a mammoth, Custom Auto Diesel Performance intercooler, which relegates the radiator and its cooling duties to the bed. Intake and exhaust were both built by Custom Auto as well, with the exhaust exiting through an impressive bedside-mounted tailpipe array.
Transferring energy to the pavement is a Custom Auto–built Allison 1000 six-speed transmission. It's outfitted with all-billet internals, upgraded clutches, a billet Sun Coast torque converter, and Fleece Performance lockup box. Should the internals decide they would rather be external, a transmission blanket from DJ Safety will keep the bits from becoming dangerous projectiles.
The truck's suspension remains factory, with only improvements to the steering tie rods and centerlink, and Bilstein shocks at all four corners. A set of CalTracs traction bars and Firestone airbags control the rear suspension. Residing at both ends is a set of 3.42:1 axle gears, and the rear sports a PPE aluminum differential cover.
Demonstrating this truck is a race truck at heart, when you fold back the bed's tonneau cover, the mounting location of the dual FASS lift pumps, fuel cell, dual batteries, dual nitrous-oxide bottles, dual radiators, dual oil coolers, and oil filters is revealed. As you can see, the importance of redundant systems is not lost on Shilo.
Thanks to its high-horsepower potential, we expect this truck to place well during the dyno competition. And because of its light weight, it should be a rocket ship at the track. The short wheelbase, however, may prove a detriment during the trailer towing and sled pull. All we know for sure is this could easily be the truck that puts Duramax back in the winner's circle.
Photo 6/10   |   Shilo Ellingford 2006 Chevrolet Silverado 2500HD Duramax Front Wheel
Photo 10/10   |   Shilo Ellingford 2006 Chevrolet Silverado 2500HD Duramax BOV

Build Sheet
Name/City: Shilo Ellingford/Idaho Falls, Idaho
Vehicle: 2006 Chevy Silverado 2500HD
Driver Experience: Dyno, drag, tow, wrench
Engine: 6.6L Duramax V-8 built with Carrillo rods and pistons, valves from Industrial Injection, NGM valvesprings and pushrods, head work by Industrial Injection, and ARP studs
Turbo(s): Custom Auto Diesel Performance custom compound turbo arrangement with Garrett GTX4508R/GTX5518R turbos
Fuel: Industrial Injection dual CP3s and 400-percent-over injectors, dual FASS Titanium 250-gph lift pumps
Electronics: EFILive tuning by Starlight Diesel
Injectables: Custom Auto Diesel Performance custom nitrous-oxide system
Intake/Exhaust: Custom Auto Diesel Performance custom intake/Custom Auto Diesel Performance custom exhaust
Transmission: Custom Auto Diesel Performance–built Allison 1000 six-speed automatic with billet internals, upgraded clutches, Sun Coast torque converter, and Fleece Performance lockup box
Suspension: Factory
Tires/Wheels: 285/60R18 Nitto Terra Grappler/18x9-inch KMC XD Hoss
Differentials: 3.42 gears



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