How does changing the Injector size in the parameter setting box work? Does this adjust the air flow meter to reduce the flow rates for idle etc? Or do I need to play with the airflow graph to pull fuel on the lower range? I ask this as the injector wires are just a tap on connection so I can’t see how the emanage could reduce an injector cycle.

If I do need to play with the air flow meter can someone suggest some settings as a starting point please. I guess I would only need to make changes in the idle to maybe 2500rpm range.

I am changing from the red tops which I think were 240cc/43PSI to some light green tops 305cc/43PSI and of course the NB is around 60PSI. I had these green tops cleaned and flow tested and they came up at 330cc which seems well over spec but were consistent. So all in all it’s an injector increase of 50%.

My set-up is;

99 NB8C Jap spec.
T25 & I/C
AEM wideband which I believe I should wire into the throttle position.
And a 2 Bar (absolute) GM map sensor
O2 clamp

Also what scales do people generally use for the fuel and ignition control? I have been recommended to use the boost pressure scale for both, and not to use the Airflow. What is the “GReddy Sensor (V)” scale?

What is the acceleration map for?


Thanks