Working on making adjustments to the tune for my car. Its stock, I did some logs and noticed it there was some knock present in cylinders 4 &1. Made some adjustments and now it seems to be running pretty good with no knock counts, but I started going down the rabbit hole tuning on Flashpro and noticed a few things with the tune that I am trying to understand better.
Here are the questions I have with the current tune.
1)WOT AF corrected leaner vs. AF commanded target
As I understand when tuning with speed density using the MAP sensor that wide open throttle relies solely on the VE maps for the AF values. During my 3rd gear WOT pull outside of VTEC on the LOW CAM the AF Corrected is tracking the AF Commanded pretty good. The AFCMD is 12.87 and the AF Corrected gets to about 13.14 in one spot. However I noticed that when in in VTEC on the HIGH CAM the AF corrected is leaning out from the target pretty much the entire time from the AF Commanded per the graph I attached. It is still safe enough , but I want it to track the target better. So I looked at the lambda values to make the adjustments in the “fuel high” tables and I am confused. These values at -4.7 from 4500-7500 are all negative. As I understand this means the ECU is pulling ~5% fuel across these cells, and that you are supposed to remove this amount of fuel to match the lambda values to get the map to be more efficient to the target value. However that doesn’t make any sense because based on the graph and data I probably need to add more fuel to get the AF to match the AF commanded values… Can someone point me in the right direction here?
2)LTFT
I noticed my tune had the LTFT min & max both set to zero. I understand that during the tuning process these would be disabled to allow for fuel adjustments, but would there be any reason to keep them set to zero after everything is dialed in? I enabled the LTFT and set them to -15 min and +15 max and the LTFT is reading between 0%-5% in the datalogs. From what I understand those are minor adjustments within what LTFT is supposed to do.
3)Knock ignition limit low
I noticed that all the values in these tables for every cam angle (0-60degrees) are set very high to 60. As I understand this is to basically bypass and disable the ignition knock correction which would be something the tuner might want to do while dialing in the car. Is there any reason to keep these values set to 60 after tuning? I haven’t done anything with these tables yet. Is it fine to keep them like this? The Knock ignition limit high values are not disabled.
Attached is my calibration and some datalogs to assist.
FlashPro SD Tune Help: High Cam Lean at WOT, LTFT Question, Knock Limit Table Set to 60
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the lord of calm
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FlashPro SD Tune Help: High Cam Lean at WOT, LTFT Question, Knock Limit Table Set to 60
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