I live at 7200 feet, and drive at 6000-7000 feet all the time. I live in Colorado. Air is thin no doubt. I want more speed and so have put a 10% smaller pulley on the sc. the boost gauge, so far I have only been able to get it to 8%. My other sc I got up to 11%. Both are stock motors other than cold air intake systems. I just read in a posting that adding a 10% pulley to a stock motor is what idiots do. I'm fairly new at this sc stuff, so my question is , is it okay to put the smaller sc pulley on a stock motor at high altitude without worrying about something going bad/wrong? what else can I do to get more horsepower at this altitude... needless to say I love my sc. it's 95 with 5 spd.
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