2004 Chevrolet Silverado 1500 Lt on 2040-cars

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Callaway debuts its new C7 Stingray at National Corvette Museum

Callaway showed off its first tuned version of the 2014 Corvette Stingray at the National Corvette Museum last week, giving the rampant enthusiasts of America's sports car a look at the roughly 620-horsepower, supercharged rocket.
Unlike the Corvette SC610 we showed you back in January, this Stingray packs a fair bit more oomph. Horsepower is only up ten ponies, but torque has jumped from 556 pound-feet to "at least" 600 pound-feet. Neither horsepower nor torque is official quite yet, although Callaway is expecting to know just what its creation can do once testing and validation is completed later this month.
The 6.2-liter, supercharged V8 now boasts a new, three-element intercooler, which Callaway claims only allowed the inlet air temperature to increase by ten degrees Fahrenheit during dyno runs. Previous designs saw a 35-degree-Fahrenheit jump. The exhaust system has also been fettled with, and now is even less restrictive.

GM delays 3.0-liter Duramax diesel in Silverado and Sierra pickups

Stricter testing protocols around the world are making it harder for automakers to predict launch timelines. GM is the latest to get caught in emissions nettles, the Detroit carmaker forced to delay the launch of its new Duramax 3.0-liter inline-six diesel for the Chevrolet Silverado 1500 and GMC Sierra 1500. That's what company reps told dealers in a memo seen by Automotive News this week. Dealers and buyers had been promised the Flint, Mich.-built oil-burner in early 2019, but AN wrote that the EPA certification hiccup has turned into a "slight delay." A GM spokesman told Motor1, "[We] did not attribute [the delay] to a single entity, as the truth is this is a collaborative effort between GM and several government entities. We will make the 2020MY Duramax available for dealers orders soon, and expect to deliver the first trucks to customers soon after emissions testing is complete." We know the new 3.0-liter Duramax diesel has 277 horsepower and 460 pound-feet of torque, outdoing Ford's 3.0-liter PowerStroke diesel by 27 hp and 20 lb-ft. But without final EPA paperwork, GM can't release the numbers that will show how the two engines stack up when considering fuel economy and tow ratings. The certification process has been sticky for a few other makers of late, especially since the Volkswagen Group situation in 2015. BMW had to delay the launch of four diesel models in 2016 over EPA testing. The new Ram 1500 dribbled out in a trickle last year for reasons thought to deal with EPA testing, coming as it did a year after the EPA investigated Ram's EcoDiesel engines in 2017 and 2018. More recently, WLTP testing in Europe caught out just about every automaker over there. Since we're almost halfway through 2019, the delay until the 2020 model year is only a few months. Still, GM told dealers to cancel any orders for the engine for this model year. Dealers will need to resubmit the orders once opening begins, but GM hasn't said when production will begin other than "soon." The company said that it will offer 2020-model-year replacement vehicles to customers and dealers. If prices hold into the next model year, the 2020 Silverado 1500 and Sierra 1500 with the inline-six diesel will come at a $3,890 premium over the 2.7-liter turbo four-cylinder, and a $2,495 premium over the 5.3-liter V8.

Impala SS vs. Marauder: Recalling Detroit’s muscle sedans 

Impala SS vs. Marauder — it was comparo that only really happened in theory. ChevyÂ’s muscle sedan ran from 1994-96, while MercuryÂ’s answer arrived in 2003 and only lasted until 2004. TheyÂ’re linked inextricably, as there were few options for powerful American sedans during that milquetoast period for enthusiasts. The debate was reignited recently among Autoblog editors when a pristine 1996 Chevy Impala SS with just 2,173 miles on the odometer hit the market on Bring a Trailer. Most of the staff favored the Impala for its sinister looks and said that it lived up to its billing as a legit muscle car. Nearly two-thirds of you agree. We ran an unscientific Twitter poll that generated 851 votes, 63.9 percent of which backed the Impala. Muscle sedans, take your pick: — Greg Migliore (@GregMigliore) April 14, 2020 Then and now enthusiasts felt the Impala was a more complete execution with guts. The Marauder, despite coming along later, felt more hacked together, according to prevailing sentiments. Why? On purpose and on paper theyÂ’re similar. The ImpalaÂ’s 5.7-liter LT1 V8 making 260 horsepower and 330 pound-feet of torque was impressive for a two-ton sedan in the mid-Â’90s. The Marauder was actually more powerful — its 4.6-liter V8 was rated at 302 hp and 318 lb-ft. The ImpalaÂ’s engine was also used in the C4 Corvette. The MarauderÂ’s mill was shared with the Mustang Mach 1. You can see why they resonated so deeply with Boomers longing for a bygone era and also captured the attention of coming-of-age Gen Xers. Car and DriverÂ’s staff gave the Marauder a lukewarm review back in ‘03, citing its solid handling and features, yet knocking the sedan for being slow off the line. In a Hemmings article appropriately called “Autopsy” from 2004, the ImpalaÂ’s stronger low-end torque and smooth shifting transmission earned praise, separating it from the more sluggish Mercury. All of this was captured in the carsÂ’ acceleration times, highlighting metrically the differences in their character. The Impala hit 60 miles per hour in 6.5 seconds, while the Marauder was a half-second slower, according to C/D testing. Other sites have them closer together, which reinforces the premise it really was the little things that separated these muscle cars. Both made the most of their genetics, riding on ancient platforms (FordÂ’s Panther and General MotorsÂ’ B-body) that preceded these cars by decades. Both had iconic names.