Quote:
Originally Posted by arpad_m
The differences are minuscule. The LT6 makes more horsepower mostly because it revs so high, its torque is practically the same as that of the LT1. Fuel economy on the C8 Z06 is the same (base) or worse (Z07) than with the supercharged(!) Camaro ZL1, despite the car weighing 4-500 pounds less. I could not find precise emissions information, so I will not comment on the "runs cleaner" part.
I don't think that is anything to write home about this DOHC in terms of power or fuel economy. It is definitely better and more innovative in some ways, but not by much.
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I don't see any reason why the Gen VI Small Block V8's would make less power( certainly not a 1980's repeat). The switch to DOHC would combat cold start emissions which is a challenge for big displacement engines( thus run cleaner part of my comment).
Like it or not, there are limitations to OHV. If GM can't get OHV to meet the 2027 MY emission standards, they will switch to DOHC.