Roland@pcmtec Posted April 16, 2019 Share Posted April 16, 2019 Had an interesting support enquiry this week. An NA FG with a Raptor supercharger running 8-10psi. The airload was capping at 1.05 causing all sorts of tuning issues, eg too much timing and fuel curve completely screwed once on boost. The solution to this was the following scalars. auF0049 enables "Anticipation" mode where the PCM will anticipate the air flow. This logic also has a side effect of calculating the airload upper limit. If it is disabled the default upper airflow load is 1.05. To fix the issue with the load we simply changed auF0049 to 1 and cylair max factor to 1, this meant the load increased from 1.05 to 1.7 which is what we expected for ~10psi Just posting this up for reference if anyone else has the same problem when doing an NA + T or NA + Supercharged configuration. I think the vehicle made roughly 220-230rwkw in the end with 10psi and 82°C intake temperatures (no intercooler). Intercooler or water meth would see a massive increase in power. Quote Link to comment Share on other sites More sharing options...
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