I have recently played around with a 1990 5.0l ford mustang maf and found it to run too low of voltage " 0.35V"at idle too tune with SAFC II and my 660 RC inj. installed . But it got me thinking about the amount of air the new maf is actually reading verses the amount of the factory hyundai is reading and the diameter of the actually mafs. I started thinking about how to alter the amount of air actually cooling the hot wire in the sensor and by doing this it keeps the voltage down at idle and extends the range the sensor has before pegging max. By simply taping half of the sensor opening to the wire inside of the maf. I dont recommend to do this because there is a chance that something may come loose and go through the turbo, again DO NOT TRY unless you are 100% sure of your ability to do so. Ill also post pics as soon as i can to better understand . This basically makes a smaller surface area for the incoming air to cool the wire therefor allowing more air to enter the engine before pegging occurs. Still in trial before ill reccommend this mod but very promising.