What exactly does changing the fuel bias and the duty bias do? And also what values are the min and max? I know default is 50 for duty cycle what would changing it to 60 do for example?I use it, it's not as big of a mystery as many think. You have fuel wires and EWG so your 2/3rd there already. You can easily set Fuel bias now, you can easily change Duty Bias now (they apply to all maps). The only difference is setting how much boost per RPM you want. If you can read logs, just view ECU PSI and Target PSI. You will see how much Map1 adds, how much Map2 adds, ect.. throughout the RPM range. You can make your own Map2 for example but it's actually a Map6. Does that make sense? Then save that config file so you can load it later. Say you go with a map5ish equivalent.. You can load that when you put race gas in at the track.
Great information here JB4 Logging Parameters - N54Tech.com - International Turbo Racing DiscussionWhat exactly does changing the fuel bias and the duty bias do? And also what values are the min and max? I know default is 50 for duty cycle what would changing it to 60 do for example?
The thread still doesn’t explain what the adjustments for fuel bias or duty cycle do. Like changing duty cycle from 50 to 60 would it increase responsiveness?Great information here JB4 Logging Parameters - N54Tech.com - International Turbo Racing Discussion
Oh okay this is helpful. Still learning what each thing does and reading logs so each bit of information helps. Thank you.Fuel Bias is described in that link as AFR. If you put 118 in all those RPM ranges, your targeting 11.8:1 AFR. If you put 125 in there, then your targeting 12.5:1 ARF.
"Responsiveness" is to broad of a term. Duty bias is the cycle at which the waste gate actuates. It won't fix lag if that's what you are referring to. By dropping duty cycle, you can fix overboost issues caused by HFC's or NO cat primaries. You can also increase duty cycle to do the opposite and hold boost at higher RPM's if you have a "track tune".
Recommended to not mess with those until you can read your own log and asses what each one is doing.
I'm kinda confused can you explain thisI used Map 6 for a while. I simply took the averages of the Target at each 500 RPMS for Map 2 and Map 3, and then I used the half way point. It worked really well. I stopped using it because I found why MAP 3 was causing Limp Mode (bad Fuel Wire connection).
I didn't touch the Fuel bias or anything else. Just boost by RPM.