[shanker]

my Autronic SM4 unit is fully tune-able with a lap-top. it can log data from track time, and has a number of really cool features that I probably won't use on this project, like turbo anti-lag that spools your turbochargers up fast when you mat the gas out of a corner.
it's also equipped with "flat shift". This allows you to change gears without lifting off the throttle while a secondary rev-limiter keeps the engine at the ideal RPM. This is accomplished with a simple pressure switch on the clutch linkage, like a brake light switch.
The Autronic units are also unique in that they have an auto-tune function that uses the input from all the engine's sensors to tune itself while you operate the engin over all the RPM and load ranges. once the engine is self-tuned you can make the minor changes that you want.

It's also significantly cheaper thsn FAST or Motronic etc.