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Fuel table max VE


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Hi. I was curious about the reason why the max VE value in the fuel tables maxes out at 150. Wouldn't higher numbers be required for higher boost levels?

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No, VE is volumetric efficiency.  This is how much volume of air you can fit in the cylinder.  Boost doesnt change the volume, it only changes the density.

Boost is already part of the air mass calculation in the background provided you have the equation load source set to "Load=MAP".

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Thanks Adam. I think I understand. I was equating VE with cylinder filling.

Per your explanation, VE for the most part  - especially in boost - should be 100% or thereabouts, right?

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Another related question: if I've wired a fuel temp sensor to the ECU, is the density change automatically accounted for by the fuel model or do I need to set up a separate table for this?

I ask because the block diagram in the help file did not seem to show a fuel temp input like it did for fuel pressure.

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Yes in modelled mode fuel temp (or ethanol temp if a flex sensor is configured) is used as along with fuel density temp coeff to calculate the change in fuel density due to temp.

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