One reason I stay away from EFI due to my experiences with EFI on motorcycles where companies like Ducati and KTM have strict control over ECU alteration and the equipment need to alter.
If the systems were flawless, no problem, when they are flawed......big problem. Mapping in '06-'10 for both companies was flawed and resulted in crappy off-idle/trailing throttle transitions which is downright dangerous on a bike being pushed hard on the street or track.......worse yet, the certified competent dealers couldn't fix resolve the issues. Downstream programmers such as the Power Commander could bandaid the issue but would still not deliver transitions comparable to a properly setup carb.
The proprietary nature of this has kept me from being an automotive EFI victim.
In the manufacturers lock up control on the systems, their legal liability department and the EPA regulations will certainly restrict/control system potential.
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