Ktuner and humidity

Zamfoob · Jun 6, 2019

Good afternoon guys and gals. I'm very new to the Honda world as well as tuning. I'm 45 years old and drag raced mustangs many moons ago. Hopefully you guys can help with a question that I have. I have a bone stock 2017 si with tsp1 ktuner tune. Today the humidity is a bit higher than usual about 65% and my ltft is staying steady at -5%. Trying to learn here so be easy on me. What is the percent of fuel calibration for percent of humidity increase or decrease. Thanks in advance

LilToTo17 · Jun 6, 2019

Zamfoob said:
Good afternoon guys and gals. I'm very new to the Honda world as well as tuning. I'm 45 years old and drag raced mustangs many moons ago. Hopefully you guys can help with a question that I have. I have a bone stock 2017 si with tsp1 ktuner tune. Today the humidity is a bit higher than usual about 65% and my ltft is staying steady at -5%. Trying to learn here so be easy on me. What is the percent of fuel calibration for percent of humidity increase or decrease. Thanks in advance

Your ltft is within normal range and nothing to worry about.

Zamfoob · Jun 6, 2019

I figured I was safe as it is a rich condition. I was just curious about how the two correlate.

hobby-man · Jun 6, 2019

As humidity increases, it displaces some oxygen in the air (partial pressure of O2 decreases). So there's less oxygen to burn, you start running rich, and the ECU pulls injector time (more negative fuel trim) to compensate.

Ktuner and humidity

Zamfoob

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LilToTo17

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Zamfoob

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hobby-man

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