So I have read through the HOW TO calibrate MAF and MAF 101 many times as well as the steps in the help file but I am still unclear on a lot of things. Its my first time tunning and I dont want to mess anything up so here is my log, 2nd gear starting at about 1500 RPM and slowly accelerating untill the MAF reads over 100. To me it looks like I did it right except for that in the log provided in the how to, the boost goes up to 12 and mine is negative all the way. (A result of slowly accelerating) Is this how it should be or should I boost at 3000 RPM like in the example log?
Don't worry it is confusing as hell when it's your first time doing any tuning. You did it right, but you should redo it, and ONLY log MAF g/s, MAF volts, LTFTs. Leave the display on MAF g/s as I'm sure you did when you took the above log. When you have all those other PIDs selected (app, rpms, etc. etc.) the resolution of the datalog sucks. If you only select those three, you'll have a lot of data points, and you want that for the maf volts, because you want to see exactly where the breakpoints are. I always do 3 maf g/s tests, as there is always some 'overlap'. By overlap, I mean different LTFT's for the same MAF voltage. So, how do you know which one do you use? Do a few maf g/s tests, and it'll give you a better idea of what the 'true' maf voltage breakpoint is. Does that help at all?