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https://www.cajinnovations.com.au/forum/YaBB.pl MyECU >> MyECU Advanced usage >> Air pressure trim https://www.cajinnovations.com.au/forum/YaBB.pl?num=1241675300 Message started by jocke on 05/07/09 at 15:48:20

Title: Air pressure trim
Post by jocke on 05/07/09 at 15:48:20

I was looking for the air pressure trim in the map but I could not find it so I guess that it is not possible to see it and it can not be changed. Does any one know how the altitude compensator works. I am in the process of transfering some maps from my Ultimap ECU and need to know if it is any difference so I can compensate for it in the map it self.

Jocke.........

Title: Re: Air pressure trim
Post by _Cliff_ on 05/07/09 at 21:28:06

The air pressure compensation is based on the ideal gas equation.
It is normalized to 1024mB

Title: Re: Air pressure trim
Post by jocke on 05/08/09 at 03:25:39

So at at 1024 it is no correction at all and from that it is allways substracting fuel (as airpressure gets lower).

Correct?

Jocke........

Title: Re: Air pressure trim
Post by _Cliff_ on 05/08/09 at 06:46:07

Correct. At 1000mb it is 2% less.