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Submit your questions for Autoblog Podcast #329 LIVE!

We're set to record Autoblog Podcast #329 tonight, and you can drop us your questions and comments via our Q&A module below. Subscribe to the Autoblog Podcast in iTunes if you haven't already done so, and if you want to take it all in live, tune in to our UStream (audio only) channel at 10:00 PM Eastern tonight.
Discussion Topics for Autoblog Podcast Episode #329
Subcompact sales slump, yet again

2015 Shelby GT bows in Scottsdale with 627 supercharged ponies

Between the base V6, the EcoBoost turbo four, the eight-cylinder GT, the monstrous GT350 and the new GT350R (to say nothing of transmission and convertible options), muscle-car enthusiasts have a staggering array of Mustangs to choose from. And now there's one more as Shelby American has introduced the new 2015 Shelby GT. Building off the success of the 2007 Shelby GT and the 2013 follow-up, the new 2015 model was just introduced at the Ford booth at Barrett-Jackson in Scottsdale, AZ. It's based on the latest Mustang GT (whether factory fresh or commissioned from an owner's existing pony car) but upgrades with an enviable list of enhancements from Ford Racing Performance Parts, Shelby's own upgrades and top-shelf third-party components. For starters, the engine is supercharged up to 627 horsepower (with over 700 available through further upgrades). It's got 3.73 gears, a Borla exhaust, WELD Racing wheels, Michelin tires and Wilwood six-piston front brakes. Visual enhancements include a carbon-fiber body-kit (including a two-piece rear diffuser) and billet aluminum front grilles. Designed from the get-go to be sold around the world, the 2015 Shelby GT is certified for use in all 50 states and comes with a Shelby American CSM number registered in the company's registry, but all those enhancements don't come cheap: Shelby's charging $39,995 for the new GT, and that's just for the modifications. Add that to the $32k sticker on a Mustang GT donor and you're looking at over $70k – which is not only more than Ford itself is expected to charge for its own GT350, but more than Dodge gets for a Challenger Hellcat. Related Video: SHELBY AMERICAN LAUNCHES 2015 SHELBY GT MUSCLE CAR FOR ENTHUSIASTS WORLDWIDE LAS VEGAS – Jan. 16, 2015 – Shelby American, a wholly owned subsidiary of Carroll Shelby International Inc. (CSBI:PK), launched the first global Shelby GT muscle car, which is based on the all-new 2015 Ford Mustang GT. One of the most popular cars in Shelby history the 627 HP 2015 Shelby GT was unveiled today at the Barrett-Jackson Scottsdale Auction in Ford Motor Company's booth. Shelby is now taking orders with delivery of cars planned for the beginning of the second quarter of 2015.

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!"