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2018 Buick Enclave: How engineers made it larger, lighter, more sophisticated

Buick used the unveiling of the 2018 Enclave at the New York Auto Show to introduce its new range-topping Avenir sub-brand to the world. With fancier interior finishes and exterior details, it's Buick's latest effort to make itself a proper luxury brand (or perhaps re-establish itself as such). However, lost in the Avenir song and dance is the fact that the 2018 Buick Enclave is a (very) long-awaited all-new model regardless of the trim level one selects. Like the Chevrolet Traverse upon which it is based, the new Enclave is bigger than the vehicle it replaces but considerably lighter, by about 400 pounds. "We told every engineer, 'get your job done, but then take the weight out,'" said engineer Rick Spina as we hovered next to his larger yet lighter creation. His team therefore set about taking a little bit of weight out from just about everywhere, from using additional aluminum in the suspension to varying the thickness of the frame (thicker in places that needed to be stronger, thinner and therefore lighter in places that didn't). Only about 100 pounds came out of the body with the rest coming from elsewhere. Not only will the reduced weight improve fuel economy (Buick-estimated at 19 mpg combined with FWD versus 18 for the 2017 model) and presumably the old Enclave's rather ponderous handling, but it should only make things easier for the new powertrain: General Motors' now-familiar 3.6-liter V6 and its latest nine-speed automatic. With 302 horsepower and 260 pound-feet of torque, Buick says the new engine will need 7.2 seconds to reach 60 mph with FWD or 7.5 seconds with AWD. That's a second quicker than before. Besides acceleration, towing is also bumped up by 500 pounds to 5,000. For those models with all-wheel drive, the Enclave has the same basic system featured on range-topping versions of the Buick LaCrosse. Besides power being sent front and rear, it can also differ from right to left in the back, although Spina is quick to point out that capability is for traction-enhancing purposes rather than sporty, handling-enhancing torque-vectoring ones. Buick owners already appreciated the Enclave for its quietness so the engineers decided to take it that much further. This included altering the exhaust, improving body sealing (there are triple door seals), including active sound deadening and utilizing advanced materials that absorb sound as opposed to simply being thick, dense and heavy enough to keep it out.

Question of the Day: Best recipient for supercharged GM V6?

The good old Buick V6 engine was built from 1961 through 2008 (including a decade of production by Kaiser-Jeep) and went into way too many General Motors vehicles to list here. In 1991, the supercharged version of the 3800 was introduced, with a Roots-style Eaton blower on top, and now you can find these engines in just about every junkyard in North America. The 3800 shares a bellhousing pattern with the also-made-by-the-zillions GM 60° V6 engine, which means that it will install (with varying levels of sledgehammer clearancing and/or axle mix-and-matching) into plenty of GM vehicles that never received the 3800 from the factory. That means one thing: engine swaps! An excellent example of this is the 1992 Chevrolet Lumina APV "Dustbuster" minivan, which is a fully caged high-performance road-racing machine that features a supercharged 3800 and 5-speed manual transmission under its long, vacuum-cleaner-snout-like hood. The RaceVan, in Springfield Monorail livery, will compete this weekend at the Michigan 24 Hours of LeMons race with Autobloggers Mike Austin, David Gluckman, and Alex Kierstein at the wheel. My personal choice for supercharged 3800 power, though, has to be the Cadillac Cimarron, preferably the not-so-sought-after Cimarron d'Oro Edition. Some bashing and welding and cutting and pasting and this lightweight Cavalier sibling could have well over double its original horsepower. So, what's your blown 3800 engine-swap choice? Related Video: Auto News Buick GM v6 question of the day questions engine swap

Buick adds Sport Touring trim to sedan lineup

Buick has made a few tweaks to its sedan lineup today, announcing that a new Sport Touring trim will be offered on the LaCrosse, Regal, and Verano. It's best to think of the new Sport Touring models as Buick's answer to Chevrolet's limited range of RS models, focusing on very small style changes rather than any added performance. Best to leave that to the Regal GS, we guess. For the ST trim, Buick has fitted its three four-doors with new 18-inch wheels. These relatively sporty hoops get machined faces with black inserts, like those offered on the Encore Sport Touring and the Enclave Tuscan Edition. Also coming to the LaCrosse, Regal, and Verano Sport Touring is a new rear spoiler. Like we said, these are simple styling packs meant to spice up the staid but handsome exteriors of the brand's sedans. "These new ST models underscore the importance of design choices, while complementing the safety, refinement and connectivity technologies that are drawing new customers to Buick dealerships," Buick VP Duncan Aldred said in the attached statement. The new trim level will be available on all three vehicles this fall, with prices to be announced closer to the on-sale date. Scroll on for the official presser from Buick. Related Video: Buick Expands 2016 Sport Touring Lineup Distinctive sedans join Enclave Tuscan Edition, Encore Sport Touring DETROIT – Buick unveiled 2016 LaCrosse, Regal and Verano Sport Touring (ST) models today – sedans with distinctive exterior cues designed to set them apart from the pack. Each features special 18-inch wheels with machined faces and black "pockets," and a rear spoiler. They join the Enclave Tuscan Edition and recently announced Encore Sport Touring as special models expanding Buick's lineup with more design-focused choices. "Buick is reaching an all-new generation of customers by reinventing itself in terms of design, function and capabilities," said Duncan Aldred, vice president of Buick. "These new ST models underscore the importance of design choices, while complementing the safety, refinement and connectivity technologies that are drawing new customers to Buick dealerships." The new Sport Touring sedans – and Encore Sport Touring – go on sale this fall. LaCrosse Sport Touring includes Buick IntelliLink with Apple CarPlay capability, OnStar 4G LTE connectivity with Wi-Fi hotspot, remote start, eight standard air bags (including rear-seat thorax air bags) and leather-trimmed seats – with heated front seats.