Just saw this last night. ZL1 vs a modded Hellcat. They did quite a few pulls, and the ZL1 never really heat soaked or anything, so it seems like they did a pretty damn good job at keeping this car cool, in stock form. It stayed cool while the Hellcat started to heat soak. Not completely sure what was done to the Hellcat, but I'm sure part of it heat soaking has to do with the modifications (spinning the blower faster).
As long as you don't increase the boost in the ZL1 with the stock blower, it'll probably stay more or less like this.