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...
scotty Posted April 21, 2019 Share Posted April 21, 2019 Does the ba boss 260 have this function available in the tune as well Quote Link to comment Share on other sites More sharing options...
Romulus Posted April 21, 2019 Share Posted April 21, 2019 If it's running boost, was turbo logic enabled? AY3A calibration, for example, has auF0049 disabled, and that is a turbo calibration. Quote Link to comment Share on other sites More sharing options...
Roland@pcmtec Posted April 21, 2019 Author Share Posted April 21, 2019 3 hours ago, Romulus said: If it's running boost, was turbo logic enabled? AY3A calibration, for example, has auF0049 disabled, and that is a turbo calibration. Yes even with turbo logic enabled it will cap at 1.05 load if you don't enable anticipation logic in that OSID. This was a HAEE3 OSID of which there was never a turbo variant made. HAEE4 was the next closest. Quote Link to comment Share on other sites More sharing options...
scotty Posted April 21, 2019 Share Posted April 21, 2019 Yes Romulus I have turbo logic enabled. I am running a f1a procharger side mount super charger. I am using a3za which is a ba gt file and adapting it. I couldn't find a reference to air charge logic in the ba tunes that's why I was asking. Thanks scotty Quote Link to comment Share on other sites More sharing options...
scotty Posted September 2, 2019 Share Posted September 2, 2019 Hi Roland just wondering if you could explain what the number in cylair max factor is doing. Thanks scottu Quote Link to comment Share on other sites More sharing options...
Roland@pcmtec Posted September 3, 2020 Author Share Posted September 3, 2020 On 9/3/2019 at 7:20 AM, scotty said: Hi Roland just wondering if you could explain what the number in cylair max factor is doing. Thanks scottu Old post but I believe it is to do with the transient airflow calculation. Because the airflow rate of change is so fast it guesses or anticipates what the airflow will be in the next half second. This also enables some other magic that Ford use. Without spending a few hours on it I couldn't give you a better answer other than I believe needed for turbos or anything that can have very large changes in airflow in a short period of time. If you disable it then there must be other settings that limit the airflow but I never dug far enough to find them. Quote Link to comment Share on other sites More sharing options...
scotty Posted September 4, 2020 Share Posted September 4, 2020 Thanks for that Roland. I see that you changed cylair max factor to 1.0 to achieve 1.7 airload capping for 10psi. I am looking at about 18 to 20 psi what to you think I should change cylair max factor to for this. Or is their a calculator to work this out. I believe 1.1 would be in the ballpark but I could be wrong. Thanks for all your help again. Quote Link to comment Share on other sites More sharing options...
Romulus Posted September 4, 2020 Share Posted September 4, 2020 1 hour ago, scotty said: Thanks for that Roland. I see that you changed cylair max factor to 1.0 to achieve 1.7 airload capping for 10psi. I am looking at about 18 to 20 psi what to you think I should change cylair max factor to for this. Or is their a calculator to work this out. I believe 1.1 would be in the ballpark but I could be wrong. Thanks for all your help again. Have you compared to a turbo calibration? auF0050 set to 0.9 auF0049 set to 0 (to disable anticipated are charge Logic) These are the setting for HAEK4PE (FG F6 auto calibration) Quote Link to comment Share on other sites More sharing options...
scotty Posted September 4, 2020 Share Posted September 4, 2020 Yeah those are the stock settings looking at where to change them too Quote Link to comment Share on other sites More sharing options...
Romulus Posted September 4, 2020 Share Posted September 4, 2020 The other question is have you changed the MAP sensor to a 2bar or 3 bar sensor? Quote Link to comment Share on other sites More sharing options...
scotty Posted September 4, 2020 Share Posted September 4, 2020 Yeah it has a 2 bar map sensor in it Quote Link to comment Share on other sites More sharing options...
Romulus Posted September 4, 2020 Share Posted September 4, 2020 9 hours ago, scotty said: Yeah it has a 2 bar map sensor in it Ok, might have to try a different strategy then. Quote Link to comment Share on other sites More sharing options...
dat111 Posted April 10, 2022 Share Posted April 10, 2022 would this be worth switching on a NA+T just in general? Quote Link to comment Share on other sites More sharing options...
Roland@pcmtec Posted April 10, 2022 Author Share Posted April 10, 2022 If it's working and load is measuring above 1.1 then just leave it as is. Quote Link to comment Share on other sites More sharing options...
Plumbs Posted April 14, 2022 Share Posted April 14, 2022 (edited) yep in my case cyl air leaned out under boost 13:1 instead of 12:1 . For me it was better to leave disabled. Edited April 14, 2022 by Plumbs Quote Link to comment Share on other sites More sharing options...
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