hey whats goin on guys!

i just had a quick question, i just wanted to know what speed density is and what aN EFI adapter is and what it does??? thanks.

 

speed density is a type of fuel/air calculation that the pre-mass air mustangs used.

It was based on a pre-set group of values that work, mostly, on a stock motor.. when you change the air channeling parts (h/c/i) of a motor, you affect the volumetric efficirntcy of the motor, and then the tables that are already programmed, will be wrong for the new setup