Hi Kevin,
My data for the 2016 model year LTG on the ATS and Camaro does indeed show that GM is under rating the motor. *I have seen the highest results on a stock 2016 ATS with up to 310 hp at the engine at ~ 24 psi in a data log and most of the Camaro stock logs were close to 300hp at 21-22 psi
Brian Blair
Vermont Tuning LLC
124 LaHue Farm Road
Sheldon, VT 05483
ph: 802-393-7305
www.vermonttuning.com
facebook.com/VermontTuning
So this was from a guy that has perhaps the greatest amount of intimate knowledge on the 2.0 LTG platform across the models. Makes me feel a lot less apprehensive with this dyno given how spot on the 5th Gens were to every other dyno. Not trying to say I have a super LTG just trying to state that GM is underrating these engines terribly and I do know weather is a huge factor in how well a dyno will produce from these cars it being 45 to 55 degrees out on my Saturday run is almost as good as your going to get.