What Are the Specs on a NASCAR Engine?

As of 2014, NASCAR mandated specifications include a carbureted V8 engine with a maximum 5.9-liter capacity (358 cubic inches). The current limitations are designed to encourage the engine parity of vehicles, which generate an average of about 850 horsepower. Most NASCAR engines are built from scratch, with the average unit taking teams roughly 100 hours to assemble and ranging in cost from $45,000 to $80,000.