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If you’re tuning cars in the United States, you’ve probably heard a lot about data logging. It’s one of those terms that gets thrown around a lot in forums and conversations between tuners, but what does it actually mean? More importantly, why does it matter so much when it comes to chiptuning?Well, data logging is basically how you make sure your tune is doing what it’s supposed to do. It gives you a snapshot of what the engine is doing under real conditions, not just based on assumptions or preset changes. Whether you're working on a diesel truck in Texas or a performance coupe in California...