Originally Posted by M3PO
Turbo guys won't notice a difference. A turbo is able to build the same boost regardless of pressure/temperature. Superchargers will be building more boost this time of year though.
Had a 135i for four years and certainly felt the difference in air temps. Especially the N54 which is prone to heat soak and reducing power when things heat up. So, yes, turbo guys WILL notice a difference.