digger Posted May 5, 2014 Share Posted May 5, 2014 i have a naturally aspirated engine running ALpha N setup but currently not using the internal map sensor to compensate for ambient pressure due to altitude change etc how do you do this? Quote Link to comment Share on other sites More sharing options...
bradyzq Posted May 11, 2014 Share Posted May 11, 2014 It's a bit of a pain that you haven't got MAP on the x-axis in either of those tables. You have to use both tables to generate that useful number. I assume you got that because you included pics of both tables. Leave the on-board MAP sensor open to the air. Your compensation table will effectively multiply you fuel table by the barometric pressure measured in bar, assuming you live near sea level. For example, if you're at sea level (baro is 1 bar), you would have no compensation (multiplied by 1). However, if you drive up in altitude, the barometric pressure drops. If you drive to an altitude where baro is 0.85bar, then you would want your baro comp table to multiply your fuel table by 0.85. Quote Link to comment Share on other sites More sharing options...
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