altitude compensation

[JulianEdgar]

I have done all my tuning at 1100 metres, and on the weekend I went to the coast. It didn't drive very well - I need altitude compensation.

I have bought another GM MAP sensor to achieve this.

Which of the efficiency and load calculation approaches do people recommend when running a manifold MAP and an atmosphere MAP?

Thank you.

[Scott@FP]

N/A or turbo/blower?

[JulianEdgar]

Turbo

[Scott@FP]

MAP/EMAP (EMAP to atmo) or MAP/BAP Efficiency method. MAP/EMAP with pre turbo exhaust pressure will require completely different fuel map from a previous MAP only based Efficiency, MAP/BAP or MAP/EMAP (EMAP atmo) will not require many changes if any.