[dimefury]

the most important factor in acceleration is power to weight ratio
reduce weight = accelerate faster

braking distance and effort are also greatly affected by weight
reduce weight = better braking

handling of a car through a corner is also affected by weight
reduce weight = better handling

weight affects almost every aspect of a vehicles performance.

every pound that you can lose will help, but use common sense.
don't remove anything that could compromise you or your passenger's saftey.
don't remove anything that will harm your vehicles performance.
and allthough removing the cars interior will remove significant ammounts of weight, girls don't like riding in gutted cars, so don't do this to your daily driver. unless you don't like girls.