Only time the BOV should be open is during high vacuum decel, in which case DFCO is probably active, so fueling should be next to nothing....if thats how he has it set up...

 

Thats true, I forget about DFCO.

 

I was planing on retaining the MAF.. The more i think of why the only answer i have is because i dont know much about SD tunes.... Time to start learning i guess.

 

The engine estimates the amount of air based on the temperature and manifold air pressure instead of measuring airflow with the maf.

 

Ya, I thought I might have problems, but on a quick decel the afr would drop from 11.4 to maybe 10.5ish for a moment, didn't make any difference in the driveability. But I'm only running 7psi, so not a huge amount of air being released.

 

KB puts the MAF right before the TB with a 90 deg elbow right before it. He says there is no issue with this, although I would think a straight pipe would be better.