THeres a few P28 ECU's chipped with the Mugen N1 program on ebay but they also have another feature.
They have a builtin rev-limiter thats hooked to the clutch wire so basically you can have WOT at a stand still with the clutch in and the the limiter will stick at 3000 or 4500, when you pop the clutch the rev limiter goes back to 9600.

This seems pracical if you want consistant launches. Any thoughts?