The Blitz ecu was developed for the 4efte to unlock much of the potential sealed away by Toyota. In any form it removes speed cut, fuel cut, raises the duty cycle of the injectors, raises the top rpm to around 8500 and give more aggressive timing at high rpms to counter the lack of top end power which was the weakness of the ct9. Because the ecu still retains the Toyota map for the 4efte (though it removes restrictions) it is able to find safe setting to work with other upgrades you make to your car (bigger turbo like the td04, higher boost etc,) within reasonable limits. This makes it versatile in situations where climate, fuel quality and such like factors would play in role in the map selected and eliminates the need for a tuner. These units are rare now and are practically a piece of starlet history. The difference between this and the stock unit is chalk and cheese. (copied and edited from one of my previous posts.)