Originally Posted by Kai
OK, first thing you should know:
MAF (mass air flow)/AFM (air flow meter) sensors are bad.
MAP (manifold absolute pressure) sensors are good.
Converting to a MAF/AFM is a step in the wrong direction. They aren't as presise as a speed/density fuel system (like comes stock on Hondas) and choke the intake tract with a flapper door or screen, depending on the model used.
This is coming from an RX-7 guy stuck with a factory flapper-type AFM. FC owners, DSM owners, and lots of other car guys fight to convert to speed/density systems because they have better power potential on all setups. Honda owners don't realize how good they have it right off the showroom floor.
If you absolutely must have a MAF, you have to buy an aftermarket EMS (Haltech, Microtech, Wolf, etc) on the order of $1000+. They can be configured to use MAF sensors.
Yes the old style MAF were big and bulky. New style hotwire MAF meters ala Toyota and others just have 1 small probe in the intake stream similar to a O2 sensor setup. Quite a big difference from older generations.
Actually both system MAF and MAP systems are quite good but on MAF has several inherent advantages that MAP does not have. MAF automatically adjusts for altitude change and moisture content in the air. MAF is actually more accurate... it's measuring the amount of air (mass) rather than just pressure.