If the modifications a supercharger, turbo or NOS then the Air/Fuel ratio should be about 11.8 at WOT.
If the modifications do not include the above mods then the Air/Fuel ratio should be 12.8 at WOT.
You will need to get a Air/Fuel monitor to determine what it is currently and after you install the modifications.
Without knowing all the modifications you plan on doing, it's hard to say whether you'll need the larger MAF or throttle body. A bone stock engine running natural aspiration probably will not benefit much from a larger MAF and/or throttle body (or may help just slightly). Yes it's true that more air and more fuel will make more power but the engine needs to be equipped to handle more air and fuel.
Director of Sales & Marketing