We can officially say the 2019 C7 Corvette ZR1 will not ditch its pushrod V8 engine for a DOHC design, but it will pack 750 horsepower. For some time, leaked documents and other information pointed to a DOHC layout for a new Corvette engine, but for now, pushrods remain. That’s despite Mercury Racing, which has ties to the original C4 Corvette ZR-1, debuting its own DOHC V8 engine based on a GM small-block unit.
The Mercury Racing SB4 7.0 aftermarket crate engine takes GM’s standard LS engine design and applies an advanced four-valve cylinder head combustion system and dual overhead camshaft valve train. The company said the engine boasts improved performance and durability over a two-valve design. And, it makes 750 hp without any forced induction.
Mercury Racing previously said it would be open to conversations about supplying future Corvette engines, but for now, its DOHC V8 will be available as an aftermarket unit only. Who knows what the mid-engine Corvette will bring, however.