I was wondering about the placement of the MAF in comparo to performance and found this excerpt from http://www.retro.co.za/efi/DIY_EFI/1996/efi1-037.txt
it goes:
"...if the MAF sensor is located
upstream of the throttle body, there will always be a delay during
throttle transients. Air is compliant, like a spring. As an extreme
but common example, when you go to WOT it takes time for the manifold
to fill with air at atmospheric pressure because it was at some level
of vacuum just prior to throttle opening. On top of that, the engine
is always "draining" the manifold. By the time the MAF sensor "sees"
this demand for air fill the manifold(and asked the ECU to provide
more fuel), the engine has consumed enough air(and sped up) to cause a
lean stumble. The closer the MAF sensor is to the throttle plate(s),
the faster its response."

Do you think this could be the culprit for the lean conditions when installing CAI's?

 

Interesting find. Though has anyone measured the difference in MAF location stock versus Injen? If not, I think i'll be doing an install tomorrow and I'll be sure to document that. I don't recall there being that much of a difference.