i was messin around with my sct a few minutes ago and saw the spark adjustment feature.. only problem is i have no idea what this does, so can someone give me a run down of what it is and how it should be tuned..

 

Jon, this is a timing adjustment for different RPM ranges, with todays crappy gas I would not mess with any timing because it can do SERIOUS damage to your motor. This feature is used by engine turners under controlled conditions.