It’s complex because engines only run well if the air to fuel ratio hovers around 14.7:1 (14.7 parts oxygen to 1 part gas), and of course, the spark plug is fired at the optimum time. However, getting an engine to run well in any given situation, like variable rpm, engine load, weather conditions, transmission selection, terrain, etc., is a difficult task. The idea is simple enough, right? More air equals more fuel, which means a bigger bang and more power at the wheels. Tuning an engine is mostly about getting as much air into the engine as possible.
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