Originally Posted by Grip Master

Exactly what i was just about to say, great post. With heated wire, or heated Grid type MAF's the PCM varies the amperage give to the heater, in order to keep it at a constant temp. More air flow= more amps needed to keep the wire at the desired temp, which tells the PCM how many Grams/sec are going into the engine.

Originally Posted by DTM

I think we are essentially saying the same thing then. I do not believe the sampling area will change with a filter element.

On your other point above...I'm not sure I can relate to the "magical waves"...but I am interested in looking at my old logs as well now when I did the IC and filter tests last year. I would love to see your logs. If you don't have time to post please email them to me as I would like to look at many different areas including TP, temp and the like. A pressure differential COULD mess with the readings slightly I guess... Not really sure. I have to do some digging.

Good post!