Quote:
Originally Posted by DeliciousTuning
It is a little hard to explain but like you stated, the MAF sensor is not affected by the pressure differences. That is the exact point, a mass air flow sensor does not know that the pressure has changed, only that the air flow has slowed or increased which translates into a final load value.
So you can have single points in the tables/maps being crossed by vastly different boost pressures because the MAF sensor (which determines load) sees the same speed of air under varying boost pressures. As you have seen, it can be made to work, but I have found it to not be ideal and something I prefer not to tune.
Cheers,
William Knose
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I would have thought that the maf would "see" more air depending on the density of the charge air so that it would see more air as boost is turned up.... I've only tuned SD so my grasp on MAF tuning is limited.