OL’ SMOKEY
DAILY DRIVER-TURNED 900HP WORK STOCK PULLER
DAILY DRIVER-TURNED 900HP WORK STOCK PULLER
An Air-limited 900HP
With regional Work Stock class rules limiting turbo size to a T4 flanged S300 with a 66 mm inducer compressor, Jeff turned to the pros at Stainless Diesel to get the most out of a small-frame Borgwarner charger. Each time out, the custom-built 5-blade S366 builds 55 psi of boost and survives more than 70 psi of drive pressure while supporting nearly 900 hp. A Wagler Competition Products twisted pedestal locates the turbo at the rear of the valley, just behind a Wagler street intake manifold, and all piping to and from the Mishimoto intercooler were fabbed up at Linco Diesel Performance courtesy of Tyler Turay.
Overkill Fuel System
Thanks to dual injection pumps being permitted in Work Stock, Jeff makes the most of it. A belt-driven Powerflo 750 CP3 from Fleece resides up top, a 12 mm stroker pump from Exergy Performance sits in the factory location, and a PPE CP3 controller ties them both together. On the low pressure side, each CP3 benefits from its own dedicated 250-gph FASS system. On the high-pressure side, a set of Exergy 250-percent over injectors distribute as much as 26,500 psi in-cylinder.
Full-billet Allison, Danville Tuning
Fully prepped for active pulling duty, the Linco-built Allison sports all billet shafts, an Xcaliber 6-pinion billet P2 planetary and billet C2 hub, Sun Coast Gmax clutch kit, and was topped off with a Sun Coast 3,200-rpm stall triple-disc converter. To lock the converter at the exact moment he needs to, Jeff relies on a Dirty Alli-locker
lockup switch from DHD. Thanks to the built Allison and Socal engine, Danville Performance is able to get the absolute most out of the overkill injection system and 5-blade turbocharger via EFI Live tuning.
Double-edged Sword
Still working with a relatively fresh build, Jeff plans to spend the summer pitting his Duramax against some of the stiffest Work Stock competition in the Midwest. But that’s not all. He is strongly considering the possibility of swapping a 2.6-inch smooth bore charger in place of the S366, dropping 500 pounds, and joining the 8,000-pound Pro Street Diesel Truck class on occasion—and possibly even running both categories at the same event. If that happens, you’ll likely see this four-door Bow Tie digging its way to the front of not one, but two of the toughest classes in truck pulling.