2006 CHEVROLET SILVERADO 3500 HD
MAKING A STATEMENT…
DERRICK BARNEY’S 1,400HP, 68RFE-SHIFTED ’11 MEGA CAB
BY MIKE MCGLOTHLIN
When a rod left the block of his 6.7L Cummins a few short years ago, Derrick Barney never could’ve imagined that he would soon own one of the most powerful-and reliable-68RFEequipped Rams in the country. But that’s exactly what you’re about to read about in the following pages. He had a new engine built, and has added dual CP3’s, upsized injectors, and went from an S472 to a single S480 in his un- ending search for more power. Along the way, he’s dealt with the trials, tribulations, and (of course) monetary setbacks that come with sticking it out with Chrysler ’s notorious six-speed automatic. However, if you cross paths with him, he’ll tell you it was worth every second.
After a factory rod left the block on a trip to Florida, Derrick Barney made sure that type of catastrophic failure would never happen again. His new 6.7L Cummins was assembled with a Gorilla Girdle from Industrial Injection and 12mm ARP main studs, Carrillo rods attached to ceramic-coated stock bowl pistons, a 188/220 cam from Hamilton, and a street head from Freedom Racing Engines. The head, which was fitted with hardened and oversize valve seats, 105-lb valve springs, and threaded freeze plugs, is anchored to the block by way of ARP Custom Age 625+ head studs.
FRESH START, STRONGER FOUNDATION
Starting with a fresh block, Derrick pulled out all the stops in making sure a hardpart failure never struck again. The mains are now tethered together courtesy of a Gorilla Girdle and ARP main s tuds from Industrial Injection while the rest of the short-block consists of Carrillo rods mated to ceramic coated factory replacement pistons. The head was transformed into one of Freedom Racing Engine’s Street HD units, with hardened and oversize valve seats, 105-lb valve springs, and threaded freeze plugs. ARP Custom Age 625+ head studs fasten it to the block .