Do to the cooler air here in Canada these days, what % performance increase should I see from more dense air...? I just installed a new Greddy Profec B Spec II and the car goes like hell now...I have a buddy telling me its all because of the colder air now...I'm probably feeling a 35-40% difference in performance as I'm am now able to hit 13.5 lbs of boost at about 4000 rpm and hold it rock solid until redline...How much of this is due to the Profec B and how much of it is due to the colder air?