Behind the wheel of the long-awaited mid-engine 2020 Chevrolet Corvette Stingray: Page 3 of 4

There's a lot more to the C8 Corvette's technology inventory than just the relocated engine.
(Image source: General Motors Co.)

The 6.2-liter LT2 overhead valve small block V8 engine is similar to the LT1 used in the front-engine 2019 car, with important differences to its oiling system. The LT2’s dry sump lets the engine sit an inch lower to the ground, lowering the car’s center of gravity. By necessity, the new dry sump pan is an inch shallower than before, and the oil tank now mounts to the front of the engine.

The tank is made from a heat-tolerant BASF Ultramid A3W2G6 composite resin in two-pieces that are hot-gas welded together and that contain an integrated oil centrifuge and separator system. The pan’s coolant passages improve oil cooling by 25 percent, while the redesigned oil tank contributes to a reduction in oil capacity by 2.25 liters.

With the engine so close to the ground, the 2020 ‘Vette’s exhaust exits through the top rather than beneath the engine. The headers are now tubular steel in place of the previous cast aluminum units. With the exhaust heat now at the top of the engine, Chevy moved the ignition coil packs from on top of the valve covers to the sides of the block. Now that the valve cover real estate is clear of ignition components, GM president Mark Reuss directed that the new car’s engine will wear badges on the valve covers identifying the LT2 as the work of the company’s Tonawanda engine plant, just as classic Corvettes from the 1960s did.

(Image source: General Motors Co.)

Chevy engineers tweaked the exhaust cam lobes, adding a millimeter of lift to match that of the intake cam and increasing duration by 12 degree, while the intake side adds a miniscule 4 degrees of duration. The team took advantage of the space above the engine to increase the size of the air intake plenum from 11.1 liters to 14.1 liters, providing space to make all of the intake runners an equal 210 mm in length. 

The LT1 lived beneath the C7 ‘Vette’s low hood, which left no space for an ideal-sized airbox with equal-length runners, so the added space in the engine’s new home allowed for that improvement, which contributes to the boost in power to 495 horsepower and 470 lb.-ft. And in combination with a faster engine control unit and a Wide-Range Air-Fuel (WRAF) sensor, the LT2 idles noticeably smoother than the LT1 did, reinforcing the impression of refinement in the C8.

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