What AFR Should I Target for E85? Why 10.5:1 Is Wrong
That magical 10.5:1 AFR everyone targets on E85 is costing you power and reliability. Real E85 varies dramatically in ethanol content, and your tune needs to adapt with it.
Why Your First Spring Drive is Destroying Your Engine (Data)
That first warm spring drive feels amazing until you check your knock logs. Your ECU just recorded 47 knock events because last year's tune is fighting this year's atmospheric conditions.
Why Spring Temperature Changes Wreck STI Tunes (Data Analysis)
Temperature swings of just 20°C can shift your STI's knock threshold by 2-3 timing degrees, turning a safe winter tune into engine damage. Here's what your datalogs are actually telling you about seasonal temperature changes.