Originally Posted by Nixlimited

Yeah, I assume these cars are running blow-through MAFs (i.e. after the compressor), which are more tricky to calibrate. I wish cars just used MAP metering instead, it's so much easier to work with. I think Hondas use MAP, or at least I believe my old S2000 did. I converted my STi to MAP after going rotated turbo because the MAF was a nightmare to calibrate with my 4" inlet.