I went to the track tonite, stock tuning my best time was 15.9 with the tailgate up, I bought a hpp3 till I save up the money for a Nelson tune, and wanted some numbers to start with. My first run was 15.937 then 15.900. I then put the hpp3 tune in and dropped the tailgate and ran a 16.003, then 16.016. What gives, tailgate down and "power tuning" Does it just take a while for the pcm to learn the tune or is stock better than hpp3? I know the Hypertech isn't great, but figured I would gain something?![]()
Thanks for the help.



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