Just a thought to make the requested torque in warmer conditions the turbo has to work harder so more boost is required. With the very cold conditions is the turbo not having to pump as much air to make the same torque. In summer i could push my boost upto 23-25psi on a max setting now i can only get 22psi on the max setting. Maybe i have a boost leak, but on my max setting i am spiking at 22psi and holding 19psi up top. With a boost leak i dont think i could hold that kind of boost pressure at the redline. Once its on at awesome i will know more if it does not make over 300whp i know there a prob.