M20 tuning

[zaxxe30]

I am new to tuning and I really would like to learn how to do it myself. I wanna know how to tune the stock ECU and what program should I use also how to tune aftermarket ECU. Looking for better throttle response, more air flow, all this stuff that you can tune. Or full remap


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[zaxxe30]

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[cgk_iii]

Interested as well. Want to start tuning once my motor is fully built.