InMotion told me to only go one step colder in the summer when it get's over 100 degrees. Otherwise stock is fine. Also said fancy plugs are a waste of money. I don't think I have the same SC overheating issues with my ASP 178mm pulley, or I just haven't noticed them. Even when it was 105 degrees at the track, my car didn't fall flat. It still pulled hard, ran slow but never felt like the SC was ever shutting down. Just from my experience. Lots of slips.