It's true that NASCAR will have EFI for the 2012 season Cup Races, keeping carbs for Nationwide and Trucks. In their usual approach the decision makers studied all of the systems out there and decided on a package from McClaren Electronic Systems out of the UK which is said to have a price tag of about $25K per car. The justification for the cost is that McClaren made a "tamperproof" system that is sealed, requiring a NASCAR Code for the electronics to function. While it would seem to be an easy thing to have an EPROM port for a chip that limits the base fuel calibration pulse width, it sounds like NASCAR is going to retain restrictor plates, placing the orifice between the intake and throttle body just like with carbs. Probably OK, but seems to be a bit antiquated with the switch to electronics.