EFI, Alpha-N vs Speed Density fueling Strategies

[GUMP]

Originally Posted by pbp1

.....Once the ECU has calculated the density of the air, it just needs to know the volume and your desired Air/Fuel ratio to calculate how much fuel to put into the engine.....

.....Once you have found the VE value that causes the engine to run at your desired or target Air/Fuel ratio with no O2 or other corrections, then you have discovered the accurate VE for your engine at that particular load and speed (in that particular cell in the VE table).....

.....Once your VE table is properly calibrated, you have an accurate Air Flow table for your engine.....

These three sentences speak volumes.

I can have a new combination running well in Alpha-N within 3-4 dyno pulls. I have also found that it is pretty easy to dial a car from my log book once I have a couple of runs on it. I also don't have to worry about sudden changes in performance due to too much fuel correction.