You can tune it with an emanage but it takes a bit of practice. I can scale back the whole maf curve over every throttle position and rpm. However, you still need dyno time to figure out where the hell you are at as a base to operate from and of course you know it has a limited range where it can tune the MAF.

Your advice to just dyno tune a chip is the best of course. Let's see if he does it.

Former owner of '99 CSVT - Silver #222/2760 356/334 wHP/TQ at 10psi on pump gas! See My Mods '05 Volvo S40 Turbo 5 AWD with 6spd, Passion Red '06 Mazda5 Touring, 5spd,MTX, Black