So, if you bought the Tuner used, then you must have sent it to Overkill to have the custom tune loaded to it, and then he sent it back?There are certain things that are somewhat easy to modify in a tune (such as shift point and torque management stuff), but other things like engine timing require a great deal of knowledge. Basically, I used the Overkill tune to learn a lot about how things work (by using the HPTuner software to compare it to a stock tune to see what was changed and why). It takes a lot of time and research to learn this stuff. Obviously, you have to be very careful and only change things that you fully understand - you don't want to blow up your engine. I've spend a LOT of time doing research on the HPTuners forum (and asking questions).
As far as I know, you can't modify the tune with the AutoCal device at all.
And yes, with the HPTuner package, you can edit your tune on a PC "remotely" and then just "apply" it to the car when ready. HPTuners also has a fantastic scanner application for reviewing datalogs. Very, very powerful software.
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