Chevrolet revisits the classics with Chevelle Slammer Concept at 2016 SEMA Show

Article by Christian A., on November 2, 2016

Chevrolet is making its presence felt at the 2016 Specialty Equipment Market Association (SEMA) Show in Las Vegas, Nevada, by showcasing around 20 unique models, including the styling yet high-tech Chevrolet Chevelle Slammer Concept.

Since the Chevelle Slammer concept is derived from the 1969 Chevelle, it does look similar to this classic car at a glimpse. Chevrolet designer Humberto Ortiz called the 1969 Chevelle as one of the best-looking cars of the muscle car era. For this reason, the carmaker won’t modify its classic cues and proportions.

Wrapped in an all-black exterior, the Chevelle Slammer features a low and raked stance laden with hot-rod attitude. This stance could be altered with a push of a button by an air suspension system, which could lower the ride height to the ground for maximum profiling.

However, Chevrolet modified its chassis to accommodate large 18-inch front and 20-inch rear polished wheels. Moreover, the carmaker made sure the classic lines of the Chevelle remain even though it has revised the body for a smoother custom appearance. Ortiz revealed that the revisions included knocking down the chrome in certain sections and tightening exterior details like its grille and bumpers. In addition, the Chevelle Slammer concept is provided with a Gen Six Camaro-based performance brake system, which includes six-piston front calipers.

The interior of the Chevelle Slammer concept, meanwhile, comes in Adrenaline Red, including its instrument panel, door panels and carpet as well as interior panels, headliner, console and seats. Its seats are derived from a 2016 Camaro while its instrument gauges are compatible with the electronic signals from the Chevrolet Performance engine as well as transmission controllers.

On the other hand, the Chevrolet Chevelle Slammer concept on display at the 2016 SEMA Show is powered by the all-new LT376/535 crate engine mated to a SuperMatic 4L75-E automatic transmission. This new crate engine and gearbox – along with controllers and harnesses -- are part of the Connect & Cruise package from Chevrolet Performance.

Jim Campbell, GM U.S. vice president of Performance Vehicles and Motorsports, called the direct-injected LT376/535 powerplant as one of the most technologically advanced crate engines ever from Chevrolet Performance. While this crate engine is derived from the LT1 engine that powers the Corvette Stingray and Camaro SS, this version comes with a distinct camshaft-and-heads package.

It builds on the Gen V Small-Block family’s technologies and evolves them further while leveraging CNC-ported heads and the high-lift LT1 Hot Cam. Engineers at Chevrolet Performance leveraged the design elements of the LT1 engine’s advanced combustion system to direct air through its optimized cylinder head ports. The camshaft profile allows the new powerplant to build output at higher engine speeds (about 6,800 rpm) while keeping strong torque at low rpm.

Meanwhile, the SuperMatic 4L75-E electronically controlled four-speed automatic transmission features 650 lb.-ft. in torque capacity, making it suitable for several highest-output crate Chevrolet engines.

Since the 4L75-E is more compact than the 4L80 series, it is much easier to install in smaller vehicles. In addition, the new 4L75-E features five-pinion gear sets, a distinct high-strength input housing, heat-treated stator shaft splines, higher capacity servo and induction-hardened turbine shaft, as well as specific valve-body calibration, eight-friction-plate 3-4 clutch and larger 2-4 band.

Press Release

CHEVY CONCEPT COMBINES STYLE, HIGH-TECH PERFORMANCE

Chevrolet’s Chevelle Slammer concept combines hot-rod style with modern performance and technology, with the all-new LT376/535 crate engine, controllers and SuperMatic 4L75-E automatic transmission.

“The direct-injected LT376/535 is the newest and one of the most technologically advanced crate engines ever from Chevrolet Performance,” said Jim Campbell, GM U.S. vice president of Performance Vehicles and Motorsports. “It is based on the LT1 engine found in the Corvette Stingray and Camaro SS, but with a unique camshaft-and-heads package to help it produce 535 horsepower — 75 horsepower more than the LT1 in the Stingray.”

The LT376/535 crate engine and SuperMatic 4L75-E transmission are offered as a Connect & Cruise package from Chevrolet Performance that includes the controllers and harnesses.

The 2017 Chevrolet Performance catalog features the new LT376/535 along with the industry’s widest range of crate engines, including Chevrolet Small-Block, Big-Block, LS- and LT-Series engines. The catalog also includes COPO Camaro and circle-track racing engines.

Chevelle Slammer is bad in black

From every angle, the Chevelle Slammer design is all about one thing: stance. It’s low, raked and dripping with hot-rod attitude. The chassis was modified to accommodate large 18-inch front and 20-inch rear polished wheels, while almost every inch of the vintage body was subtly revised to give it a smooth, custom appearance, but not at the expense of its classic lines.

“The ’69 Chevelle is one of the best-looking cars of the muscle car era and we didn’t want to mess with its classic cues or period-perfect proportions,” said Humberto Ortiz, Chevrolet designer. “We’ve simply enhanced it where we could, knocking down the chrome in certain areas and tightening other exterior details such as the bumpers, grille and more. It’s still a 1969 Chevelle at a glance, but as you continue to examine it, the details really stand out.”

An air suspension system alters the stance at the push of a button, including dropping it all the way to the ground for maximum profiling when on display. The car also features a Gen Six Camaro-based performance brake system, including six-piston front calipers.

And while the exterior exudes attitude in all black, the interior makes a searing statement in Adrenaline Red.

“The contrast between the exterior and interior is stunning and dramatic,” said Ortiz. “The idea was to give the cabin the appearance of being dipped in red.”

Mission accomplished. Everything from the instrument panel, door panels and carpet to the headliner, interior panels, console and seats is trimmed or painted Adrenaline Red. The seats come from a 2016 Camaro, while a set of custom gauges in the instrument panel were selected for their compatibility with the electronic signals from the Chevrolet Performance engine and transmission controllers.

LT376/535 crate engine is a high-tech powerhouse

Chevrolet’s all-new, direct-injected LT376/535 crate engine builds on the Gen V Small-Block family’s technologies and takes them to the next level, leveraging CNC-ported heads and the high-lift LT1 Hot Cam to deliver 535 naturally aspirated horsepower.

Chevrolet Performance engineers developed the high-performance camshaft-and-cylinder-head package in-house, leveraging the design elements of the LT1’s advanced combustion system to channel airflow through the optimized cylinder head ports.

The Chevrolet-developed camshaft profile extends the horsepower-building range of the engine higher in the rpm band, pushing it to about 6,800 rpm while still maintaining strong low-rpm torque. Direct injection enables a high 11.5:1 compression ratio that contributes to the engine’s strong horsepower-to-displacement ratio of 1.43:1, or 87 hp per liter.

“The LT376/535 crate engine represents the best of Chevrolet’s performance engineering,” said Rocko Parker, Chevrolet Performance Parts engineer. “Adhering to the same standards as the development of production engines, the LT376/535 offers tremendous power with the drivability expected with a new vehicle. It’s the best of both worlds.”

Chevrolet’s LT376/535 crate engine — part number 19355378 — includes a production intake manifold, throttle body assembly, ignition coils, water pump, balancer and more. It requires Chevrolet Performance’s engine controller kit, part number 12677124.

SuperMatic 4L75-E automatic transmission offers big capacity

The Chevelle’s crate engine is paired with Chevrolet’s new SuperMatic 4L75-E electronically controlled four-speed automatic transmission (part number 24283281) featuring a torque capacity of 650 lb.-ft.

That exceptional capacity makes it suitable for many of Chevrolet’s highest-output crate engines and a great alternative to the 4L80 series when packaging space is an issue. The 4L75-E’s “barrel” is significantly smaller than the 4L80 series, making it easier to install in many smaller vehicles. It is also lighter, which enhances overall performance and vehicle balance.

The new 4L75-E is based on the already robust design featuring five-pinion gearsets and other strengthened components. It also includes a unique high-strength input housing, higher capacity servo, heat-treated stator shaft splines, induction-hardened turbine shaft, eight-friction-plate 3-4 clutch, larger 2-4 band and specific valve-body calibration.

“The Chevelle Slammer’s combination of style and performance makes a strong hot-rod statement and is the perfect platform to launch the new direct-injected LT376/535 crate engine and 4L75-E transmission,” said Campbell.

The Chevelle Slammer joins approximately 20 additional Chevrolet models at the SEMA Show, Nov. 1-4. Follow the action at ChevySEMA.com, #CHEVYSEMA, @ChevroletPerformance on Instagram and Chevrolet Performance on Facebook.

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