it really depends on a number of things. But on tract my IATs never went above 117 after 12 laps. Those numbers I’m happy with.What are your IAT's normally? I noticed that mine seem to be kind of high with my turbo setup, almost wonder if its a bad sensor or maybe I just need a bigger intercooler.
In a traffic jam on a hot day they can go up as high as 140, but I don’t load the car up until they drop again.
Recovery is key a good system will start to recover as soon as the car starts to get some air through it.