I just did some testing myself...

Stock MAF and stock SVT airbox: average of .7 at 720rpm, never dropping below .65.
Gutted MAF and open K&N: average of .63, never dropping below .56.

I used the optimizer to set the idle for a steady .70-.71 with the gutted MAF and K&N. The interesting thing is that the MAF optimizer seems to smooth the MAF's output. Instead of varying from .65 to .74, it never goes below .70 or above .71. Hmmmmm....


2000 Mercury Cougar V6 ATX. 16.0@87MPH, 155.0 FWHP