There's two ways to datalog with the XCal. First, you can simply plug it into the OBDII port and follow the Datalog prompts on the XCal. Or you can download the LiveLink software from the SCT website and datalog through the XCal directly to your laptop computer. Most tuners prefer the second method because it allows for more flexibility and also permits more parameters to be logged. The datalog file can then be emailed so the tuner and remotely tune your car.
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