1976 Red Cadillac Deville/el Camino on 2040-cars

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How GM's grueling 24-hour test gets the kinks out of its performance cars

One of the biggest challenges automakers face when designing a high-performance car is making sure that it is both fast and reliable. For General Motors, any car that might be taken to the track by its owner - like the Corvette, Camaro Z/28 (shown above) and the Cadillac CTS-V, for example - undergoes a rigorous and strenuous 24-hour test by engineers at the Milford Proving Grounds, as pointed out by Car and Driver.
We've posted on this topic in the past - on a video showing the Camaro ZL1 being brutalized, for instance - but this article gives a more in-depth look at what actually happens behind the scenes... including what that poor ZL1 went through. Though the test isn't for 24 hours straight, the cars are pushed as hard as possible by some of GM's best drivers with only the brakes and tires replaced frequently.
We don't want to ruin the fun for you, but it is an interesting article that tells just some of what GM does to develop its sports cars. Check out the full article over at Car and Driver for the rest of the story.

40+ cars that barely avoid the gas guzzler tax

The Gas Guzzler schedule, with mpg ratings and charges that haven't changed since 1991, lays out which fuel-swillers owe what to Uncle Sam.
I started thinking about the "Gas Guzzler Tax" - considerably less well known as The Energy Tax Act of 1978 - when I was driving Dodge's new Challenger SRT Hellcat last week. Unsurprisingly for a car that can burn 1.5 gallons of gas per minute at max tilt, theoretically able to empty a full tank of premium in about 13 minutes, the Hellcat will be subject to the Gas Guzzler Tax schedule when it goes on sale.

Is Cadillac working on an ELR-V? [w/video]

Could it be? Could Cadillac be working on an even higher-end version of its ELR plug-in hybrid? Well, General Motors' Executive Vice President Mark Reuss has gone on record as... well, not saying much. The exec was more than a bit coy on video (which you can view below) when asked about the idea of an ELR-V, although he did say that Cadillac was looking at "expanding the tuning envelope" for its plug-in coupe. What that means could be hinted at in these spy photos.
Cadillac is certainly up to something with this little red ELR. As is often the case, it's the car's enhanced brakes that give it away. Bigger binders are a telltale sign of sportier aspirations, and it's safe to say that rule applies with the ELR. The larger rotors and four-piston Brembo calipers are sourced from the Buick Regal GS, which we imagine would be plenty to bring the high-priced hybrid to a halt.
Obscuring those rotors and calipers are larger, double-armed five-spoke wheels. And, according to our spies, hiding behind that camouflage is a new grille. Outside of those two items, though, there's not much aesthetic change.