Get some chainsaw trousers if the blankets too expensive. Just seen your maths, now if im correct which i may not be as im shattered, if you were to have used that 22cm pulley at a 53x ratio, at 7000rpm the charger would be doing 370000rpm which is way over what turbos normally run at. You'd be wanting more like a 1/15 so 7k would be 105k rpm. Turbos run at 100-140000rpm That is unless you've worked out what ratio the is from crank to powersteering pump.