Originally Posted by
turbo_bu
As you have probably been reading, the main thing will be to try and get the airflow value half way close. If your still running a MAF, you can at least see about how much airflow you need for "idle" by holding the throttle and keeping it running at 1000 RPM. The actual amount of air for a lower idle speed will be a little lower, but it could serve as a starting point. If your running SD (no MAF), you can still find amount how air is necessary, but just need to record a few more PIDs (IAT, MAP, RPM) to calculate that value. The formula for calculating airflow for a SD setup are in those tutorials.