You didnt mention what model and year of Alpine you have so most of us have to guess what might be going on. One potential cause is above average intake manifold temps [eg above 150 degrees]. When you start off on cold/cool mornings, engine temps havent warmed sufficiently to activate the engine fan so the boost air going thru the CAC isnt being cooled enough. You can watch this process unfold on Silver Leaf if you have the capability.....
2003 40' MDTS
Garden Ridge, Texas