Originally Posted by Stu @ M Developments

Don't misunderstand my topic.
I am merely trying to show that most people don't realise their boost curve is both expected and required by the programmer of the chip. Deviating from it can cause terminal damage because people don't realise that even though they run 31 psi at 4000rpk, they can not usually still run it at 8000rpm with a MUCH larger injector for he simple reason that we have only half the time to inject fuel so need an injector twice the size to get the same amount if fuel in.

Air injectors are an ecu controlled version of an electronic boost control valve. We have a map that says X boost and Y rpm = Z duty cycle, however this is nothing like as impressive as a modern jap style controller that regulates the boost to within 1 psi and will actively regulate the waste gate to maintain our target boost. Air injectors are just on a programmed duty cycle and as such are even affected by ambient air pressure, which is why the adjustable air injector boost knob was developed. (No, it wasn't developed for you to have low, medium and high boost boys...lol)

A good boost controller, setup properly by a pro will always be far better than air injectors.
Their biggest downfall by far, is that you can mess about with them. Lol