I just started work on analysing the MAF scaling on my car. I haven't gotten to far yet, but thought I'd share where I'm going with this if anyone is interested.

I think MAF scaling is key to properly tuning any car with an aftermarket intake. Fudging the fueling table for high load, messing with injector scaling, etc, is IMHO the wrong approach, and one should attempt to keep the load values as accurate as possible. There are plenty of workarounds, but I think doing it right and keeping all the maps accurately scaled is a better idea.

http://freon.shackspace.com/car/ecu%20and%20tuning/mafscalinganalysis.xls

I'm interested in what others are doing to fix up their MAF scaling, if at all.