Dyno'd AEM and BSD today! Got some A/F questions?
A couple things.
First, running lean is not a result of the fuel pump not pumping enough. Its a result of the MAF being in a different tube than before. The computer doesn't know that, and you are taking in more air than before for any given MAF reading. Apparently our car runs much more normal than a 6s, which were running terribly rich stock and why they picked up a bunch of power. I'm beginning to wonder about any intake that moves the MAF to a different tube.
AzMz, so your gains were only like a couple hp correct? Were you on the same dyno both times? What about temperature and what not. I would expect to see the BSD results a couple on its own, and people have been reporting CAI's at what, 5ish? Something sounds a little fishy. Its too bad too, I'm halfway through my BSD install.
2004 Mazda 3s Sedan 5 spd
removed intake resonator, modified lower airbox
balance shaft delete, independent fog lights