To a Corvette enthusiast, the new LT2 engine visible through the rear glass of the 2020 mid-engine Stingray is a beautiful piece of engineering to see.
But the new powerplant – though it has the same displacement and remains naturally aspirated, like its predecessor in the C7 – represented a much different challenge – and opportunity – for the Corvette team.
First of all, since the engine is no longer mounted in the front of the Corvette, forward visibility was no longer a concern for the engineers, meaning they could use a taller intake manifold that increased in size considerably, to 14.1 liters from 11.1 liters.
The engine also is able to produce 3 percent more power at higher RPMs, thanks to the use of runners that are now of the same length, an impossibility with the LT1 used from 2014 to 2019.
Chevy also redesigned the camshaft with a different profile, and a one-millimeter larger exhaust valve lift matching the intake lift results in additional flow that leads to more power.
Other key ingredients to helping the LT2 become the most powerful base engine ever offered in a Corvette were a new wide-range air-fuel sensor (WRAF) that helps the engine idle smoothly and reduces emissions by 25 percent; a completely new design for the exhaust using new 4 in 1 headers with primary runners of almost the same length; new catalytic converters with one per bank instead of the two used in the old LT1 engine; and a new dry-sump oil system for better lubrication, especially at high speed, and better oil pressure while requiring less oil and making the engine lighter.
All these improvements add up to a 0 to 60 time of 2.9 seconds for the new LT2 engine, which delivers a whopping 495 horsepower and 470 lb-ft of torque.
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The 2020 Corvette Stingray Goes 0-60 MPH in 2.9 Second