maf and throttle body diameter

[jaykay]

Hmm for the 996 the mass airflow sensor section diameter is probably common for cost savings ; parts interchangeability etc. I did not know that these sections were shared. The reduction in diameter here would bump up the velocity with minimal losses.....so very little hurt for major parts sharing cost savings......just a guess.

When you get to the throttle body 68mm with a butterfly valve stuck in there is a de tune vs. a 74mm. as long intake velocity does not fall off below optimal....just a guess

I looked into rapid proto typing an intake piece I am making....low volume costs
are huge...The IPD price is a bit easier to swallow after that but....

I have all this rolling around in my head too. Let me know how you make out!