There’s a lot of hype, speculation and rumors surrounding the 2018 Corvette lineup. Previous, leaked documents, in particular, showed a 6.2-liter LT5 V8 engine coming to the vehicle for the 2018 model year, which begins this summer. Not only that, but the LT5 is supposedly a dual overhead cam design.
Autoblog has put its detective face on and connected a few dots to try and solve the DOHC Corvette mystery, and there’s one very interesting piece. And here it is: the LT5 DOHC V8 engine may be testing in marine applications as you read this.
LT5-powered boats? It does make sense.
Mercury Marine showcased its own LS7 V8 engine-based DOHC engine at the 2016 SEMA Show in Las Vegas. Specifically, Mercury Racing was responsible for ditching GM’s valvetrain setup and placing its own 32-valve DOHC unit in. Why is this important? Mercury Marine was tapped to build the original LT5 DOHC V8 engine for the C4 Corvette ZR-1. That engine was designed by Lotus Engineering, but it was birthed from a boat engine assembly line.
The LS7-based DOHC engine Mercury Racing showed is capable producing 750 horsepower and features an 8,000 RPM redline. Not bad performance figures for a boat, let alone a car. The engine would also have no issues clearing the hood of a Corvette. As the report states, the 6.2-liter LS3 V8 engine measures 17.72 inches tall and fit snuggly under the hoods of Camaro, Corvettes and the SS sedan. This small-block, pushrod V8-based DOHC engine measures just 17.1 inches tall.
The new LT5 V8 engine may not be an all-new engine either since it’s expected the LT5 will debut with the C7 Corvette ZR1, also lending itself to having pushrod roots. Though, we still have our doubts of the C7 ZR1 featuring the engine. It’s still very possible the LT5 will be reserved for the mid-engine, C8 Corvette.
But, then we’re left wondering what the leaked documents represent when stating an LT5 is inbound for the 2018 model year of Corvette. And we seriously, seriously doubt the mid-engine Corvette is coming for 2018. Intel also suggests the base C8 Corvette will not be a hybrid, either, though a hybrid variant is likely, judging by E-Ray trademark filings.
It’s still a tricky puzzle, and one we ultimately won’t know until someone slips and offers more insight into the whole shebang. Ultimately, we won’t know the outcome until the Corvette team is ready to show the C7 ZR1 to the world.