Just something to think about, exactly how does your PCM know what load your engine is running at if you are tricking the PCM to think you are still using a stock maf?
Also, look for a maf that will read accurate for the amout of CFM you plan on pulling. The Ford 80 mm and 90 mm are among the best curves I have seen, but I have yet to see them all. Rara what is your opinion on this subject?
