if i have a GMS MAF and they claim that it flows 45% more than the stock maf , do I adj the maf tables ( tunercat) + 45% ,is this correct , or will it cause problems?

 

You may or may not have to adjust the MAF tables. The calibration may be right on. Calibration has nothing to do with its efficiency in allowing air to pass through the device.

Check your BLM's after you install. If you have to recalibrate, find out if it is making your BLM's consistently rich or lean or is it variable?

Post the results so we can all see. I would like to know.

Make sure you know what your BLM's are before the changeout.

Ben