Originally posted by M&M CUSTOM
Changing nothing else, your vehicle will slow down with a higher ratio gear set.
Very true. But to clarify a bit... all things being equal a higher gear ratio will also increase acceleration but only to the limits of the engine's ability to rev to a particular RPM. In other words, with a higher gear ratio acceleration will be increased but your top speed will come down, unless your engine is modified to increase it's power band and usable RPM range.
To state it another way, with the higher gear ratio (4:11) you will get to 95 mph quicker than with the lower gear ratio but... the lower gear ratio will allow you go ultimately go faster. If the engine is modified to increase it's usable RPM then top speed will be increased with the higher gears and you will get to that higher speed faster than with the lower gear ratio. It's ultimately a trade-off and the trick is to match the engine's ability to rev to the gear ratio so that your top speed and max RPM come together at the end of the quarter mile.
Hope I didn't muddy the water even more...