What is the number exactly? relative to outside will move around but there is def. a ceiling to that. I am generally around 100 degrees intake air temp. I have seen as low as 87 during a full boost rip, and as high as 120. Imo anything above that (120) is a bit too hot. I have seen a shitty intercooler set up and it was at like 140!!!! No bueno. Also where is the sensor located? that can make a huge difference.