My penultimate question...

Now that I am boosted, I find that I rarely take the car over 3k rpm since the car is untuned, and, of course, my fuel mileage is garbage (lol) i get like 125 miles to half a tank combined city/highway with occasional runs over 3k rpm.

What I am wondering is this: if I drop in my Z32 MAFS now, I will certainly not be running as rich as I was before, since the same amount of airflow results in a lower voltage reading out of the Z32 MAF than the A32 MAF. Will I be running lean?

Also, I have an aversion to doing permanent damage to the car, and in a sense I will be once I cut the A32 harness to put the Z32 MAFS harness in place. My second question: can I leave the A32 connector/plug connected to the wiring harness and simply splice in the Z32 connector/plug further down the line? Or will that cause problems even though the A32 connector won't be plugged into anything?

 

No damage is being done to the car. You just wireing in a different MAF Plug. You can always go back to A32.
Some guys splice in the Z32 Harness and some guys just go ahead and cut the A32 Harness and start fresh. I totally cut the A32 Harness off and wired in the Z32 MAF Plug fresh. Its really up to you. If you still want the A32 Plug there, go ahead and splice instead of cutting.

-matt