This just out. Seems like some big power on the horizon. Can't post the link but a quick search will get you there...
"According to this engine production forecasting document, GM is starting production of two new DOHC V8s at the Tonawanda production facility. One will be a 4.2L, and the other will be a 5.5L. The current 6.2L V8 is also listed as an option.
A look at horsepower. Short of exact numbers, “elegant” and “rsinor” list “maximum output” of the new engine family (across all displacements) as 850 hp and 720 lb-ft of torque. So it would make sense that the new 5.5L twin-turbo would be the 800+ hp model to move it above the ZR1 in power and performance. But, if you do some backwards math and cut that 5.5L into a horsepower-per-liter measurement, and then apply that to the smaller 4.2L, you get a max output of 650 hp. We don’t think it’s a coincidence that it lines up nicely with the Z06 Corvette."
"According to this engine production forecasting document, GM is starting production of two new DOHC V8s at the Tonawanda production facility. One will be a 4.2L, and the other will be a 5.5L. The current 6.2L V8 is also listed as an option.
A look at horsepower. Short of exact numbers, “elegant” and “rsinor” list “maximum output” of the new engine family (across all displacements) as 850 hp and 720 lb-ft of torque. So it would make sense that the new 5.5L twin-turbo would be the 800+ hp model to move it above the ZR1 in power and performance. But, if you do some backwards math and cut that 5.5L into a horsepower-per-liter measurement, and then apply that to the smaller 4.2L, you get a max output of 650 hp. We don’t think it’s a coincidence that it lines up nicely with the Z06 Corvette."
Last edited: