Calibrations are always set up to run air fuel to a specific number, in the case of the 2005 GT the target number is 12.0-12.5, but you have to keep in mind different gauges can vary, we are using an expensive well maintained system built into our chassis dyno by the dyno manufacturer. We are in Florida, heat is always high, humidity as well, and dry clean air is dense and can effect air fuel.
Different fuel, different conditions or combinations of aftermarket parts make for variables. The air fuel numbers your using are so far off the scale it does not surprise me there was a problem, but a DiabloSport calibration was not commanding that number, something else was creating this condition, and the best we can do is give you safe ranges of adjustability, the ability to add a custom tune, and attempt to educate the end user on what to do if these conditions exist.
DiabloSport can not be there to monitor each vehicle, we do however supply you the end-user with the tools to do it, and try to educate people on how to deal with different situations.
Thanks,
Nick Spinelli
DiabloSport V.P Marketing
[email protected]