[6spdhyperblue]

AI leaning on physics and eng. theories and concepts and provided the following.

This isn’t what I’m running today but would be open to experimenting if there is a supporting consensus here. What are your thoughts?
It seems really rich to me. I challenged that and it insists that it will make more power with these

e85
RPM Target Lambda Timing (° Total) Notes
2,500 0.84–0.85 19–20° High load, knock sensitive
3,000 0.83–0.84 20–22° Torque ramp building
3,500 0.82–0.83 21–23° Approaching torque peak
4,000 0.81–0.83 22–24° Near peak torque
4,500 0.80–0.82 23–25° Peak torque area
5,000 0.80–0.82 24–26° Transition to HP focus
5,500 0.79–0.82 25–27° VE dropping slightly
6,000 0.79–0.81 26–28° Peak HP zone
6,500 0.79–0.81 27–29° Airflow limited, needs timing

93 octane
RPM Target Lambda Timing (° Total) Notes
2,500 0.85–0.87 16–18° Knock-prone region, timing pulled back vs E85
3,000 0.84–0.86 17–19° Torque building safely
3,500 0.83–0.85 18–20° Approaching midrange torque peak
4,000 0.82–0.84 19–21° Peak torque area, conservative timing
4,500 0.82–0.83 20–22° Mid-high torque, slight knock buffer
5,000 0.81–0.83 21–23° Upper RPM, torque focus
5,500 0.80–0.82 22–24° Peak HP ramp
6,000 0.80–0.82 23–25° Peak HP, airflow limited
6,500 0.79–0.81 24–26° Top end, safe knock margin

Humidity
Fuel Humidity Effect Timing Change at WOT
E85 High RH → cooler charge, ethanol adds knock margin +1–3° at 2,500–4,500 RPM
93 High RH → cooler charge, but less knock margin than E85 +1° max at 2,500–4,500 RPM
E85 Low RH → slightly hotter charge 0 to -1°
93 Low RH → slightly hotter, more knock-prone -1–2°

[Joshinator99]

What combo is this being run on? Boosted or NA? Cam specs? Compression? What other mods? Sure as heck would not work on a boosted combo.

[vince3]

I have tried numerous combinations using AI for timing and fuel that had a similar concept. All were slower (60-130) than what a tuner did. They say lower timing at peak torque, but it’s the part that was most noticeable when I made the adjustments. 2nd part was 110-120 and 120-130 mph segments when I tried .85 and below.

I spent way too much time with Claude,grok and chatgtp on this with little to show for.

[6spdhyperblue]

Originally Posted by Joshinator99

What combo is this being run on? Boosted or NA? Cam specs? Compression? What other mods? Sure as heck would not work on a boosted combo.

Stock SS with a lt2 intake and cai

I think I’ve tried and swept these afrs years ago and landed much leaner. I wish I kept my notes

[6spdhyperblue]

Originally Posted by vince3

I have tried numerous combinations using AI for timing and fuel that had a similar concept. All were slower (60-130) than what a tuner did. They say lower timing at peak torque, but it’s the part that was most noticeable when I made the adjustments. 2nd part was 110-120 and 120-130 mph segments when I tried .85 and below.

I spent way too much time with Claude,grok and chatgtp on this with little to show for.

They were telling you to running richer too and you went slower right?

[vince3]

Originally Posted by 6spdhyperblue

They were telling you to running richer too and you went slower right?

yep. Even going from to .85 from .88 it got slower. I never went richer than .84, it seem to run best between .87-.88 and above that, i didn't gain anything so i backed it down.

My tune is very similar to this car timing and fuel wise and you can see by rpm the afr/lambda and timing if you slow it down. The data log part starts around 15:45