mass air meter calibration

If I get a mass air meter and injectors that are calibrated for each other, do I still need to recalibrate my ecm? I am only wanting to do 19 or 24 lb injectors for a mild upgrade.

Thanks

Also, is it worth putting bigger ingectors in a naturally aspirated car, with only minor upgrades.

I doubt you need to upgrade your fuel system if you have very minor mods. What are your mods?

Its more of a theoretical question. I am planning to buy a 96-98 cobra soon and trying to plan my mods to get the most bang for my buck, and the possibility of a blower or turbo. I plan on starting with the normal stuff, CAI, exhaust, TB, intake pipe, tuner, etc. I am pretty knowlegable about cars, but have not done too many mods. At what point is it advantagous to upgrade the fuel system?

If you want my honest opinion, save your money up and do this right the first time. Get the Cobra, then upgrade exhaust & possibly rear gears. Then install a Vortech SQ-trim supercharger, the blower "kit" comes with fuel and ignition upgrades.