I have an 02 hybrid swap that had the exact same MAF tube from TurboXS that came with my SSAC FMIC years ago. I was maxing out the voltage on the sensor with my setup and measured it to compare to a bigger MAF and found the TurboXS MAF housing is actually the same as stock..
I don't see why you couldn't just use a stock scaling for your MAF and and just tune the injectors in..?
Casey has a tweaked base table for our model car's housing over at
viewtopic.php?f=31&t=3292Compare that to what you have, give it a shot..