RoverGauge row scaler/multiplier/adjustment factor

[ed_crouch]

I wonder if someone might be able to help me please?

when the 0-255 (normalized) fuel map bins in the 14CUX are displayed in RoverGauge and multiplied by the row scaler/adjustment factor/multiplier, what does the resulting number refer to?

Is it volumetric efficiency, injector PW, MAP?

Thank you in advance.

Ed.

[spitfire4v8]

Good question.

It's not volumetric efficiency because at no point do we tell the ecu what size the engine is, so it doesn't know how much air is being used compared to the theoretical maximum.
It can't be MAP, because at no point does the ecu see any manifold pressure readings.
It's not a direct pulse width, because no ambient correction factors are displayed in the fuel map.

So .. it's just a number, based on airflow, which when re-adjusted based on the injector scaling and correction factors, gives us the afr we need.
As such it's reasonable to assume it's closely related to volumetric efficiency, but isn't that exactly because the ecu doesn't how much air it *could* consume, only what it *is* consuming. I guess you could call it a volumetric consumption table..