Last month we introduced Project Ronix Rig, a 2007 GMC Sierra Classic, when we installed a Snugtop cap, Bushwacker fender flares and Shocker Motorsports clear mudflaps. We also lifted it with a Cognito Motorsports 7-inch kit and put King Off-Road Racing shocks onto it, but we knew adding 35-inch Cooper tires mounted on 18-inch American Racing Wheels' Chambers was going to take some oomph out of the LBZ. Before the truck headed up to Shocker Motorsports to get lifted, we took care of replacing the lost throttle response, and then some.
Project Ronix Rig received the three performance bolt-ons almost every modified diesel gets first: Intake, exhaust and programmer. The intake we chose was K&N's FIPK system, the exhaust was Bully Dog's 5-inch Rapid Flow kit and the programmer was Bully Dog's Triple Dog Power Pup. As each modification was performed, we put the 6.6L Duramax on K&N's Dynojet to see what kind of numbers it put down. In each format we took several runs to try to get as accurate results as possible and then the runs were averaged together. Read on to find out how the LBZ responded to the performance parts from Bully Dog and K&N.
The '07 GMC Sierra Classic was run on K&N's DynoJet several times after each modification for as accurate results as possible.
In stock format, the 6.6L LBZ peaked out at 288.47 hp and 462.26 ft-lb of torque
