Heres some data...
This is an independant boost log from Sniz using a Helix FMIC and Vishnu V3 in FAHRENHEIT-this is a 2nd thru 4th gear run as you can see temps start at 100 degrees F drop down as the car starts getting ambient air through the core and at the end of 4th gear the Ait is only 110 degrees F
Heres a code 3 datalog in CELSIUS from this thread.
http://www.e90post.com/forums/showth...ight=code+fmic
Temps rise from 46(114f) degrees C to 59(139f) degrees C in 2-4 gear, ambient temp was 65 degrees F(18C)