So I’m working with this 1992 Foxbody. Came in with a few issues. It currently is a 302 with a V1-SC. So he took it to a well known tuner here locally to get it tuned and was told the MAF was not responding to the changes he was making but did not have time to investigate why. The intake tube leading to the MAF was riddled with holes so I am going to hard pipe that section. I know that will cause issue. Looking at the MAF, it is a Pro-M MAF. How many people have had luck with tuning on this style MAF. I ran the part number and Pro-M states it’s calibrated to a N/A setup with 24lb injectors and a cold air fender Intake kit. The owner “thinks” the car has 30lb injectors. Can these MAFs be recalibrated by a tuner or is it better to use a larger non calibrated Ford MAF? Also I am used to running larger systems than this one and do not see many systems not running bypass valves anymore. This kit doesn’t seem to have a bypass which I have always considered a must with a draw thru MAF setup.