Thick, black smoke billowed across shiny asphalt and the smell of half-burned diesel and melting rubber filled the air. The roar of wide-open turbocharged V-8 and six-cylinder engines echoed into the stands at Salt Lake's Rocky Mountain Raceways. Early fans trickled in to watch the warmup runs where drivers would evaluate the track and determine their dial-in times.

Owners of modified Fords, GMCs, Chevrolets, and Dodges came to the annual Weekend on the Edge, and the Edge dyno competition held the following day at the company's Ogden, Utah, facilities. The competition was divided into three classes: Modified, Open, and Wide Open. Modified allows minor bolt-on improvements such as exhaust, air filters, intake and exhaust manifolds, injectors, and plug-in power chips. The basic fuel system and turbo remain stock. Open class can include aftermarket turbos, modified fuel-delivery systems, and injectors. Wide Open gets into major engine modifications, dual turbos, and alternative fuels such as methanol, nitrous oxide, and propane.

Just a few years ago, 13- and 14-second quarter-mile times were good. With today's technology, e.t. (elapsed times) of 11 and 12 seconds are common, with many top speeds well over 100 mph.

Zane Koch, owner of Wide Open Performance in Sandy, Utah, noted that's pretty fast to move 6300 pounds of truck. His 1997 Ford F-350 runs two monster Bell Power Turbos pumping through a five-inch stack. The engine is fueled with a MagnaFuel by ITP through injectors by Industrial, and programmed by BTS. A BTS 4R100 transmission and a converter by Precision Industries put the horses to the wheels.

Adding NOS two-stage injection boosts rear-wheel horsepower to around 900 and torque to 1450 pound-feet. This is the world's quickest Power Stroke, with a record of 124 mph, finishing the quarter mile in 10.83 seconds. It retains a full factory body, stock dash and interior, and is still a street-legal daily driver. The boost runs between 110 and 112 psi. Despite some wheelhop problems getting off the line, this Super Duty turned in the best performance of the day, with an e.t. of 11.42 seconds and a speed of 122 mph.