Mass Air Meter Q...

Nope... unless your stock meter was recalibrated for 30 lb injectors, then you're stuck with it until you can get the car tuned again. Stock meters are calibrated for roughly 19 lb injectors. My guess is that your computer was tuned to deal wiht that. Putting a meter in now that is calibrated for 30s will screw everything up UNLESS (comma) the due that did your tune was a tool and did not properly adjust the stock meter's transer function.