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quickieafsetup [2010/02/08 08:19]
twdorris
quickieafsetup [2011/07/06 08:31]
twdorris
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 Knowledge of this fundamental concept is __**key**__ to understanding everything else below. Knowledge of this fundamental concept is __**key**__ to understanding everything else below.
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 ===== Idle ===== ===== Idle =====
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 If fuel trim at idle is not where I want it, I either use the lower airflow sliders (log ''​MAFRaw''​ to see where to make adjustments) or I use deadtime to tweak things. ​ If I'm running SD, I'll use the SD VE table instead of the airflow sliders. If fuel trim at idle is not where I want it, I either use the lower airflow sliders (log ''​MAFRaw''​ to see where to make adjustments) or I use deadtime to tweak things. ​ If I'm running SD, I'll use the SD VE table instead of the airflow sliders.
  
-Whether I make changes to airflow/VE or deadtime usually depends on whether ''​AirflowPerRev''​ is inline or not. If ''​AirflowPerRev''​ is off from the expected value in the opposite direction from ''​CombinedFT'',​ then I adjust the lower airflow sliders more than deadtime. ​ If ''​AirflowPerRev''​ is around what I'd expect, I might focus on deadtime instead for idle fuel trim adjustments. Just keep an ear out for little misfires at idle that can sometimes be introduced with deadtime adjustments,​ particularly if the injectors are not well matched at low pulsewidth.+Whether I make changes to airflow or deadtime usually depends on whether ''​AirflowPerRev''​ is inline or not. If ''​AirflowPerRev''​ is off from the expected value in the opposite direction from ''​CombinedFT'',​ then I adjust the lower airflow sliders more than deadtime. 
 + 
 +If ''​AirflowPerRev''​ is around what I'd expect, I might focus on deadtime instead for idle fuel trim adjustments. Just keep an ear out for little misfires at idle that can sometimes be introduced with deadtime adjustments,​ particularly if the injectors are not well matched at low pulsewidth.
  
 ===== Cruise ===== ===== Cruise =====
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 ===== Automated adjustments ===== ===== Automated adjustments =====
 **NOTE:** With the release of V3, we've added a more "​automated"​ method of doing the above idle/cruise dialing. ​ Be sure to read about it on our [[v3mafadjcombft|MAF Adjust page]]. ​ Or, if you're running SD, read the [[sdveadjcomft|SD Adjust page]] or the [[sdveadjsdratio|SDRatio Adjust page]]. **NOTE:** With the release of V3, we've added a more "​automated"​ method of doing the above idle/cruise dialing. ​ Be sure to read about it on our [[v3mafadjcombft|MAF Adjust page]]. ​ Or, if you're running SD, read the [[sdveadjcomft|SD Adjust page]] or the [[sdveadjsdratio|SDRatio Adjust page]].
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 ===== WOT ===== ===== WOT =====
-Then I do a few pulls and look at ''​BoostEst''​ around 5500-6000 RPM to make sure it matches with what the gauge was reading. Some deviation is expected, especially as revs increase. But more than a psi or two and I feel like I want to tweak the airflow sliders some more.+Then I do a few pulls and look at ''​BoostEst''​ around 5500-6000 RPM to make sure it matches with what the gauge was reading. Some deviation is expected, especially as revs increase. But more than a psi or two and I feel like I want to tweak the airflow sliders some more.  You can calculate the amount to move the sliders if you understand absolute pressure and how to calculate scale factors. ​ Otherwise, just lower the MAFComp sliders if BoostEst is above measured boost or raise MAFComp is BoostEst is lower than measured boost.
  
-At that point, I'm usually pretty happy with the setup and can start tuning.+Once that's done, I'm usually pretty happy with the setup and can start tuning.
  
 ===== Other checks ===== ===== Other checks =====
quickieafsetup.txt · Last modified: 2024/03/15 11:16 (external edit)