Tuning AFR & ignition

-turbo afr(AIR FUEL RATIO) biasanya 11.5-12.5 -NA biasanya 13.5-14.7 -ignition timing lock at 10/15/20deg -remember retard when u hear knocking detonation pingging etc.. -the more boost you want consider retard more for engine safety. -dan yang pasti, proses tuning ini bukan perkara yang bole buat suka hati.