Just put a boost gauge in and wanted to know when is the best time to get an accurate boost reading ? If i run it in first and second gear it reads about 9# in third and forth it reads 6# !?! Reason I want to know is im up'in the boost and I dont want to go to much over 10# !! Also does anyone know the stock pulley size on a vortech supercharger or does it vary depending on the factory boost from Vortech ?