View Full Version : Speed Density Charge Temp Blend Factor (MAF g/sec)
Gelf VXR
January 8th, 2015, 02:16 PM
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
January 8th, 2015, 05:45 PM
I thought it uses DYNAIR g/s...
Gelf VXR
January 8th, 2015, 09:24 PM
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
January 9th, 2015, 03:08 AM
Hmmm, let me think about it... (I'm looking in an LS1B file... can you post your E40 file).
joecar
January 9th, 2015, 09:41 AM
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.
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