Temp & Elevation Differences as They Relate to Fuel Maps

[Checkered-Member]

Ok here is an interesting question:

I live in south cali, during the day temperatures can rise over 100 and drop to low 50’s in the same day. I also find myself driving threw different elevations, sea level; Malibu and L.A. basin and the Santa Monica mountains 1000-2000 feet

When running 9psi on a stock DE with E-Manage, are these difference something I need to think about, in other words do I need different fuel maps for different situations?

[C-Kwik]

Mine seems to be compensating pretty well. I was up in Norther Cali this summer up in the mountains. Probably got up as high as 6000 feet. I had no problems with it. The MAF will automatically correct for the difference in airflow. Whether the ECU mapping is optimal at that range is beyond me, but it felt fine. It was enough to get me a speeding ticket while I was there...

[jacob360]

Turbo engines are less affected by altitude changes than NA cars. As long as manifold pressure and air temperature are the same, there wont be a difference. If your engine is operating in closed loop, it will be able to compensate.

[bruinbear714]

Ok here is an interesting question:

I live in south cali, during the day temperatures can rise over 100 and drop to low 50’s in the same day. I also find myself driving threw different elevations, sea level; Malibu and L.A. basin and the Santa Monica mountains 1000-2000 feet

When running 9psi on a stock DE with E-Manage, are these difference something I need to think about, in other words do I need different fuel maps for different situations?

Why would it be different? That's the job of the MAF. It measures air density and that's the beauty of it. Doesn't matter how cold or hot the air is - it'll compensate automatically due to the nature of the design.

[Checkered-Member]

Why would it be different? That's the job of the MAF. It measures air density and that's the beauty of it. Doesn't matter how cold or hot the air is - it'll compensate automatically due to the nature of the design.

The MAF is compensating on stock setting it doesn’t know I have a turbo, I was wondering if it is compensating enough for not too cause any trouble or loss of power, but now I see that it does a pretty good job.