When a Chevrolet announcement quantifies how much the 2015 Corvette Z06 is more powerful than a Porsche 911 Turbo S and a Ferrari F12 Berlinetta, you know it has to be something special. And, it is: With a LT4 supercharged 6.2L V-8 that produces 650 horsepower, the Z06 easily grabs the title of “most powerful production car ever from General Motors.”
The Z06 generates its power quickly, producing 457 lb.-ft. from idle and 625 lb.-ft. by only 2,800 rpm. The folks at Chevrolet conveniently point out that a V-12 Ferrari F12 Berlinetta gets 28 percent less torque than the Z06 and peak torque isn’t achieved until 6,000 rpm. The Z06 engine sustains 90 percent of its peak torque, or 592 lb.-ft., from 2,500 to 5,400 rpm.
“The LT4 Small Block sets a new benchmark for power and torque at GM,” said Steve Kiefer, vice president, GM Powertrain Engineering.
The new Z06 engine generates 40 percent more peak torque (180 lb.-ft./244 Nm) over the earlier generation’s 7.0L LS7 engine. It’s also 7.5 percent more than the supercharged 2013 Corvette ZR1.
The LT4 engine builds on the Gen 5 small block foundation in the Corvette Stingray’s LT1 6.2L naturally aspirated engine with a few modifications, including lightweight titanium intake valves and stainless steel exhaust manifolds and an aluminum balancer, both of which are lighter than those in LT1.
With all this power and performance, the Z06 comes in either a manual or an 8-speed automatic transmission, a first for GM and surely one of very few cars in its segment to have this option.
The LT4 is assembled at the new Performance Build Center at GM’s Bowling Green Assembly Plant and at GM’s Tonawanda engine plant in New York. The automatic transmission is built in Toledo, Ohio.
According to GM, the 2015 Corvette Z06 will arrive at dealerships in the fourth quarter of 2014.
Photo Credit: Chevrolet