Tweecer...........

The tuning sub-forum and various tuning forums have some nice basic info.

You can change nearly any parameter in the computer with the twEECer.

The RT gives the ability to datalog, which is worth every penney if you're into this stuff.

You'd likely want a WB and cheap laptop.
Good luck.
 
yes the tweecer is a piggy back system that allows you to adjust almost all of the parameters in the computer....injector size can easily be adjusted. The R/T version stands for real time. it can be used to data log the cars performance by keeping track of up to 14 input/sensor values so you can look back at them and analyze the effects of your changes. get one....they're cool
 
not the easiest to learn though. Do lots of research online before you mess with anything. There are a lot of things you can change and therefore screw up if you aren't careful.