rusefi.com

Here's a comparison of the default IAT correction table for Megasquirt and RusEFi: Question: In the current fuel equations for eg. Speed-Density and Alpha-N, is (1) the raw IAT value taken into account to establish a baseline air density based on eg. the ideal gas law, or (2) does the equations use the IAT correction lookup table for that purpose?

If (2) is the case; would it be a good idea to implement an approximation to the ideal gass law values in the IAT correction table by default similar to the MS method?

rusEFI uses ideal gas law, but not directly on the intake air temperature. We estimate the temperature at the valve based on a function of IAT, CLT, and airflow. As the airflow slows down, it picks up more heat from the intake/cylinder head on its way by, so it ends up hotter.

This dialog configures that heat transfer:

The table here is derived from the factory GM tune for my V8, and works pretty well.
tl;dr: you shouldn't need anything other than flat 1.0 in that IAT fuel mult table. It's there if you need it, but you probably don't.

https://github.com/rusefi/rusefi/issues/4728 created within the https://github.com/rusefi/rusefi/wiki/Contributors-please-work-smart principle

Thanks Andrey

It's hard to notice that help menu but at least some progress I guess