Re: ATR 7th injector
it goes on top of the throttle body plate ,an electronic box controls the delay of when it comes on.
boost determines when it comes on.
it is better just like alcohol to have a code 59 or special tune for it to maximize like alcohol, but can be run by itself.
makes any size injectors increase the fuel load- here is the math.
example 6 stock 36 lb injectors + 1 36 lb 7th injector.(to keep simple)
36lbs divided by 6= 6
36 + another 6 = 42
so 36lbs act like 42lbs when boost is on.