Speed Density Charge Temp Blend Factor (MAF g/sec)

[Gelf VXR]

I was just wondering when in speed density (MAF disabled), how does the PCM look up the charge temp factor based on MAF g/sec?

[joecar]

I thought it uses DYNAIR g/s...

[Gelf VXR]

I'm just thinking there's something wrong with that? Looking to the table its trying to correctly reference, its in a feed back loop?

[joecar]

Hmmm, let me think about it... (I'm looking in an LS1B file... can you post your E40 file).

[joecar]

PCM uses airflow g/s to lookup the factor to skew the air temperature toward ECT...

and then temperature is used to lookup VE to calculate DYNAIR...

it looks like a feedback loop... this could be stable (converges) or unstable (diverges) depending on the blend factor and the filter...

hmmm, interesting... requires a few experiments.