RHS,

About the Me and Jeff post.

I mapped SAE.MAF/GM.DYNAIR. The ONLY discrepancy was during tip in/out. This indicates either the VE needs more slope(inversely prop. to map) or the SAE.MAF is not using the TauX (wall wetting) parameter. I have yet to think enough to check that. I guess I could bash the TauX and see what happens. A GUESS IS MAF IS NOT USING TAUX.

Jeff, 2 days later: well, maybe MAF alone cannot account for every change that occurs in the airflow or fuelflow, so I'll start changing IFR to make up for it!
Wonder what he found exactly?



me: so you're adjusting IFR to make up for the MAP/MANVAC based changes. Why don't you also add RPM based changes to it, and just call it the VE table?

You sure have a problem with IFR adjustments. I have been an electronics tech for 30 years and a mechanic since a child. I know that balancing an inductive load considering vac differential/transient and moving mass is going to take a very long time. According to what I know of your standards... IFR is basically crap. For a give (constant) situation, I think I'll trust the MAF calibration.
S