| The most significant help those will provide are better efficiency and less sensitivity to hot weather backing off the ignition timing advance curve.
New chip swill have improved algorythms which will enhance drivability. Not a lot of help with acceleration I'm afraid.
If you want that you need to not only help engine to breath better by wider intake all the way through, and I mean all the way, as in NO bottlenecks -- airbox, AFM sensor body, throttle body, extrude honed intake manifold, port and polish heads, and tuned headers and cat back exhaust, all in conjunction with a shorter rear diff so you can use the more freely reving characteristics. Will get same economy but jump all that weight quicker if you do all the above. But it is useless to do only one of the engine mods, unless yo uare in a hot climate and it is the chip.
If you do al the above, expect a good 15% improvement, and if you keep your original diff., better fuel economy.
RM | 
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