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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.

2021 Cadillac Escalade to have a massive 38-inch curved OLED display

The redesigned 2021 Cadillac Escalade is going to be revealed Feb. 4, and it’s going to have a huge screen. Cadillac released a video teaser today showing the enormous display — watch it above. This screen is a curved OLED display that measures 38 inches from corner-to-corner. The exact resolution wasnÂ’t revealed, but Cadillac claims the pixel density is twice that of a 4K television. That particular stat is also rather nebulous, as the pixel density of a 4K TV varies with the TVÂ’s size. Regardless, itÂ’s safe to say that the screen is going to be very sharp and look fantastic. CadillacÂ’s use of an OLED screen will ensure it has spectacular color representation and the best blacks that a screen is capable of. Smartphones with OLED displays typically offer a better experience than those with LCD displays, and we can hope the same is true for this Cadillac display. On top of it being a huge screen, Cadillac also says itÂ’s the “first curved OLED” in the industry. Most infotainment screens in cars these days are flat displays, but Cadillac appears to be sticking its best tech foot forward with this curved screen. Other details worth noting in this teaser is the obvious presence of Super Cruise. The green light stretches across the steering wheel, indicating that the new Escalade will definitely offer the semi-autonomous driving technology. The rest of the interior is difficult to make out, but there appears to be a row of shiny buttons below the screen. Below this we can see what might be the top of the gear lever sticking up. ItÂ’s tough to know for certain what it is, but itÂ’s similar in size, shape and style to other new Cadillac gear levers. However, both the 2021 Chevy Tahoe and Suburban use push-button shifters. The switch to an actual gear lever would be more consistent with other Cadillacs, but inconsistent with its full-size SUV brethren. We wonÂ’t have terribly long to wait to find out. Cadillac says itÂ’s going to reveal the new Escalade in Los Angeles during Oscars week. Expect some of the big stars to roll up to the red carpet in new Escalades. ItÂ’s hard to think of a better place to show off the chromed-up, shiny new Cadillac. Related Video:      

How Cadillac improved power output in 2016 ELR by 25 percent

Earlier this year, Cadillac announced that the 2016 ELR would come with a big price drop and a powertrain that packs 25 percent more power output. That's a lot more oomph, but it didn't sound like the Caddy engineers made any major changes to the engine or motors. So, what happened? Let's refresh our memories with the numeric details. The 2016 car is 1.5 seconds quicker to 60 miles per hour than the 2014 model (there was no 2015), down to 6.4 seconds. The 2014 put out 295 pound-feet of torque. For 2016, it will be 373 lb-ft. The specific breakdown of the various components in the powertrain has not been disclosed, but from what we can tell, the two electric motors and the 1.4-liter inline-four engine in the new ELR are not that much different than those in the old one. Sam Abuelsamid, senior research analyst at Navigant Research (and former writer here at Autoblog) said that any of the unspecified upgrades would be difficult to tell on a part-by-part basis, but the overall effect will be noticeable. "The changes to the ELR as I understand them are analogous to getting more performance out of a 1965 Mustang with the entry version of the 289 cubic-inch V8. You can replace the carburetor with a larger version that enables more air and fuel to flow into the engine, thus producing more power. The basic engine hasn't changed, but power capability is being unleashed by feeding it more." "Cadillac has changed components in the power electronics to enable more current flow into the motor and thus produce more torque. When you do this in the Mustang, you probably need to replace the rear axle gears and use a beefier clutch to transmit the power to the wheels. Similarly, the ELR probably has some upgraded clutches, bearings, and gears to withstand the increased total output." Cadillac spokesperson David Caldwell told AutoblogGreen in an email that the new ELR does indeed have more than just new lines of code. "One could not 'reflash' a previous ELR to get the performance of a 2016," Caldwell said. "If one only changed software you would not get the performance upgrade fully, as the 2016 creates higher current, more power. So these have been upgraded physically – hardware.