I did a search but found nothing ? I am sorry if this is a stupid question but why do I get almost 1 psi more when it is low 60's outside opposed to normal boost from high 60's to 105 ? I even have a greddy profec b and for some reason when it is cold at night it will creep right past my preset point of 16.5 psi and it will hit boost cu if I am not carefull ? Any info would be great . For now I have the low boost set for 65 deg and below 16.5 psi and for 65 and up I have the high boost set for 16.5 psi . This seems to work fine but I was just curious on why more boost when cooloer ? Thanx .