2007 Chevrolet Silverado on 2040-cars

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Diesel Power finds the ultimate modified oil-burner

For nine years, Diesel Power magazine has run the Diesel Power Challenge, this year's grindfest being "a week-long torture test that features seven events, nine trucks, 8,000 horsepower, and nearly 15,000 pound-feet of torque." The road to being crowned "the most powerful truck" starts with a dyno run, and then continues through the completion of a CDL-style obstacle course, an eighth-of-a-mile drag race while towing a 10,000-pound trailer, a quarter-mile drag race without a trailer, a fuel economy test in the mountains and finally a sled-pulling test through a 300-foot-long packed-mud pit.
What kind of trucks get into such a fight? Last year's winner, for instance - who upgraded his truck this year to prove he didn't "luck into the win" - drives a 2008 Ford F-250 Super Duty with a 6.4-liter Power Stroke V8 upgraded with a custom intake, Elite Diesel triple turbos and a two-stage nitrous system. Another competitor has a 2005 Dodge Ram 2500 powered by a 5.9-liter Cummins inline-six, upgraded with Garrett turbos, dual-stage nitrous, a seven-inch exhaust stack and twin fans built into the bed to cool the Sun Coast Omega transmission. The numbers on that truck: 1,255 horsepower, and 2,063 pound-feet of torque at the wheels. Naturally, as the image above might suggest, things don't always end well.
You'll find all five videos covering this years challenge below. A scene in the dyno video sums it all up perfectly: a competitor leaves his nitrous on too long and the crew is treated to some ominous poppings, he leans out the window, throws both hands up and shouts, "Amer'ca!"

Race Recap: Rolex 24 at Daytona was fast and feisty

Let the record show that victory at the 2015 Rolex 24 at Daytona went to the No. 02 Chip Ganassi Racing with Felix Sabates Target/Ford EcoBoost Riley DP driven by Verizon IndyCar drivers Scott Dixon and Tony Kanaan and NASCAR drivers Jamie McMurray and Kyle Larson. The winner did 740 laps to cover 2,634.3 miles in 24 hours and 57.667 seconds. That's a statement to this year's pace in spite of 18 cautions, two more than last year: the Michael Shank Racing Ligier got pole with a time of 1:39.194, slower than last year's pole time of 1:38.270; however, the winning car last year only did 695 laps. The fight for top honors was shaved to a four-car battle over the first third of the event. The No. 02 Ganassi car took the lead on the first lap, swapping it well into the night with the No. 01 Ganassi car, the No. 10 Wayne Taylor Racing Corvette DP, and the defending champion No. 5 Action Express Corvette DP, all of them staying within about 20 seconds of one another. The Action Express car had a fuel connector come loose and lost three laps getting towed back to the pits to have it reattached, but was back in the lead 18 hours in. The No. 01 Ganassi car dropped out with recurring clutch problems 22 hours in, retiring not long after. A race-within-the-race is where the concluding action happened, a seven minute, 30-second dash from the end of the last caution to the checkered flag. During the penultimate pit stops with an hour to go, Dixon was in second place followed Jordan Taylor in the Wayne Taylor Racing DP into the pits but beat him out, taking the lead. The Action Express car was in third. In the last pit stops of the race, Dixon gained even more time, getting a four-second advantage over Taylor. Then a full-course caution came out twenty minutes before the finish when a Prototype Challenge car hit the wall and caught fire, bunching up the field. That closed the pits, but the Wayne Taylor Racing car had to pit during that yellow because of a miscalculation of driver time. No driver can be behind the wheel for more than four hours in a six-hour period but Jordan Taylor was going to go over, so he came in to swap out for brother Ricky. That cost the team any chance of second place, since they took an additional drive-through penalty for entering closed pits. When the track went green again, Sebastien Bourdais in the Action Express car stayed all over Dixon for the final five laps but couldn't get around him.

Junkyard Gem: 1986 Chevrolet Sprint Plus

General Motors sold second- and third-generation Suzuki Cultuses with Geo or Chevrolet Metro badging in the United States from 1989 through 2001 model years, and we've all seen plenty of those cars on the street over the years. The first-generation Cultus was sold here as well, with Chevrolet Sprint badges, and I've found a rare example of the Sprint five-door hatchback in a Northern California car graveyard. The Chevy Sprint first appeared on the West Coast as a 1985 model, then became available everywhere in the United States for the 1986 through 1988 model years (in Canada, it was sold as the Pontiac Firefly). It was available here as a hatchback with three or five doors; for 1986 only, the five-door was badged as the Sprint Plus. Soon enough, The General would be selling many more Asian-built cars with Detroit badges here. Isuzu I-Marks were sold as Chevrolet/Geo Spectrums starting in the 1986 model year, while Daewoo provided the Pontiac LeMans two years later. Under the hood, a 1.0-liter three-cylinder rated at 48 horsepower. The five-door Sprint cost $5,580 in 1986, which was $200 more than the three-door (those prices would be $15,445 and $14,891 in 2023 dollars). I've documented seven discarded Sprints prior to this one (including an extremely rare Turbo Sprint), and all of them were three-doors; we can assume that price was the most important factor for Sprint buyers. Gasoline prices were crashing hard during the middle 1980s, but memories of gas lines and odd-even-day fuel rationing from 1979 remained strong. What cars competed with the '86 Sprint on sticker price? Well, there was no way to undercut the hilariously affordable (and terrible) Yugo GV, which cost $3,990. The much bigger (but still pretty bad) Hyundai Excel listed at $4,995, while Toyota would sell you a sturdy (but zero-fun) Tercel starting at $5,448. Even the wretched Chevy Chevette — yes, it was still available in 1986 — cost $5,645. The original buyer of this car was willing to shell out an extra $395 to get an automatic instead of the base five-speed manual. That's about $1,093 in today's money. This car must have been slow. By the end, the doors were held shut with duct tape, but it still stayed alive until age 37. 53 miles per gallon on the highway! It does everything. The camels of the highway.