Ecuflash is the software that allows you to change fuel, timing, boost, rev limits, and more. Basically you read the memory off your car's ECU, make some changes in the maps and parameters, and load it back up. It's very powerful stuff and with the right equipment it is competely self do'able. You just have to learn what does what and what to look for, but it's not brain surgery. Just take things slow, make slight changes, and look at the results. Do you have to change something more, is it just right, or change it back?
As far as cost;
a lap top (300mHz+) $200-$1000
you choice of logable wide band $200-$300
Tatictrix cable $90
Logging software (free-$25)
The price of being able to log and tune your own car at any time for any reason...
Well, you know.
