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Gas prices down, 707-hp engine production up... USA!

On Saturday, the United States of America will celebrate its 239th birthday. That means fireworks, barbecues, block parties, and, oh yeah, Hellcat engines and low fuel prices. The most American of (Mexican-built) powerplants, the big, loud, supercharged, 707-horsepower Hemi is slated for yet another production boost to match up with some serious demand, while the dino juice it runs on is cheaper than it's been in over half a decade. The Saltillo, Mexico engine factory already produces some 4,000 Hellcat engines each year – that's in addition to the Tigershark four-cylinder, the 5.7-liter Hemi, and 6.4-liter SRT Hemi V8s – and it's not entirely clear how many more might get added to that total. What we do know, though, is that Fiat Chrysler can't build the engines fast enough. "We're going to build more [Hellcats] for 2016," SRT boss Tim Kuniskis told Automotive News. "It's a small sliver of what we sell, but it really creates a halo for the rest of the lineup. For example, the next highest car, the Scat Pack Challenger, I have essentially a zero-day supply. It's sold out." This bit of good news comes on the back of something equally good – low summer gas prices. According to the US Energy Information Administration, the nationwide average for for "all formulations" of fuel in June sits at $2.885. Ignoring the remarkably low prices we saw in January and February of this year – figures that themselves hadn't been seen since May of 2009 – the national average hasn't sat that low since October 2010. So yes, it's a very a good time to be an American gearhead. News Source: Automotive News - sub. req., US Energy Information AdministrationImage Credit: US EIA Green Plants/Manufacturing Dodge Fuel Efficiency Coupe Performance Sedan dodge challenger srt tim kuniskis dodge charger srt

Bonhams to auction Carroll Shelby's prototypes and personal cars

Fans of Carroll Shelby will want to make their way to Greenwich, Conn., this June, because Bonhams will be selling a great many cars from the man's personal collection. And many of them are the first of their kind, marking important milestones in Shelby's career. One of those important cars is a 1982 Dodge Charger prototype, which might not look as impressive as a Cobra, but it was important in that it was the first car on which Shelby collaborated with Chrysler. That car led to the first Shelby Charger, as well as other special small Chryslers including the GLH Omnis and Chargers (GLH standing for "Goes Like Hell"). In fact, the first Charger GLH-S (Goes Like Hell S'more) is also part of this collection. There are even some prototypes up for auction that never resulted in a production car, such as a Shelby modified Dodge Ram. That one is probably our favorite: the gold ram hood ornament, the huge pentastar in the grille, the double-barrel truck horn on the roof. It's wonderful nonsense. Of course it isn't just Chryslers going up for sale. There are a couple of GT500 and GT350 Mustangs in the mix from a variety of years. Perhaps most interesting is the very first Shelby Series I, Shelby's ill-fated roadster designed from the ground-up by the Texan's company. Unlike the other early Series I models, Shelby's had a supercharger, which led to a supercharger option being offered later. You can check out the full list of cars below, and pictures of each one in the gallery at the top. The auction will happen on June 3, and every vehicle offered has no reserve, so they'll all be sold for whatever price is shown at the drop of the gavel. 1927 Ford Model T 1931 Ford Model A 1935 Chrysler Airflow Sedan 1955 DeSoto Hard Top 1966 Shelby GT350 Convertible 1967 Lincoln Continental Convertible 1968 Shelby GT350 1969 Shelby GT 500 previously owned by Jackie Cooper Jr. 1969 Shelby GT 500 1982 Shelby Charger Prototype 1983 De Tomaso Pantera 1983 Dodge/Shelby Pickup Concept 1987 DeTomaso GT5-S 1987 Dodge CSX Serial #1 1987 Shelby Charger GLH-S Serial #1 1987 Dodge Shelby Lancer Serial #1 1988 Dodge Shelby Dakota Prototype 1989 Dodge CSX VNT Serial #1 1965 Shelby Cobra 427 Continuation 1999 Shelby Series 1 Serial #1 2008 Shelby GT 500 KR 2011 Shelby GT 500 Super Snake Aurora Race Car Related Video: Featured Gallery Shelby Collection View 72 Photos Image Credit: Bonhams Chrysler Dodge Ford Auctions Performance Classics shelby

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!"