FWIW i've tuned 20+ LS1 cars on this same dyno. This is my stock 98 A4 12 bolt rear tuned, then with a lid/filter installed and retuned, all done on the same day with minimal time between changes. All pulls started from same coolant temp.
Almost all bolt on 99+ cars I've done on this dyno make 290-320rwhp. Pulls are super repeatable with the error being +-1HP between pulls which makes seeing tuning changes super easy. Nothing beats a dyno like this for tuning. I think I ran a 14.4 at the track in it.
The sad truth is the new Camaro is a turd.