A month ago, we presented our argument for the DOHC V8. A big, bulging hood like the one seen here could be hiding that new engine. One big benefit of the continued use of a pushrod engine is the compact size. While there are a large number of benefits to overhead cams, the design does make for a tall engine. Obviously, that necessitates a taller hood like the one seen here.
Instagram user robert_hellcat has also posted a video of a close encounter of the Corvette kind. This time, the car was captured pulling out of a gas station. It's one of the best views we have of the car so far. When the car pulls away, we can hear the exhaust note. It does sound a little different than the Z06, but it was also a low rpm rollout, so we can't make any clear judgments. We also don't hear a supercharger, but GM has gotten pretty good at masking that sound.
That said, all of the DOHC business could be wrong. The last ZR1 packed a supercharger, so the big hood might simply be hiding a larger displacement blower and a larger intercooler. Remember, when the current Z06 first arrived, it was having cooling issues. Those problems have been fixed, but we're sure Chevrolet doesn't want it to happen again. We still don't know anything official, but expect a full reveal sometime this fall or at the Detroit Auto Show next January.