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1️⃣ AFR Target Selection
In the lesson, you chose an AFR target of 11.6:1. Why not use a slightly leaner target like 12.0:1 or 11.7:1?
I’d love to understand the logic behind that specific AFR choice — is it based on the fuel type, boost level, or knock sensitivity of the EJ platform?
2️⃣ Knock Ignition Table — Load Extension and Timing Choice
I noticed you extended the ignition knock control table to 3.6 g/rev, which makes sense due to the larger turbo and increased airflow.
However, I’m unclear on how to choose the timing values in those extended high-load zones.
You placed values like 6°–8°, but how do you calculate or estimate safe numbers to start with?
Should they be based on pressure ratio, AFR, or a fixed rule-of-thumb for new airflow zones?
3️⃣ Why Perform Steady-State Runs at 2000 and 3500–4000 RPM?
In the video, you did a run at ~2000 RPM, and another at ~3500–4000 RPM.
why you make these runs ?
4️⃣ MAF Rescaling Based on Fuel Trims
When rescaling the MAF, I saw that you adjusted values based on short and long-term fuel trims to bring them within ±2–3%, and also aligned AFR to the target.
Can you explain how you choose the percent correction based on the trims?
you make the change about -2.5% at the top of the maf rescaling but we have almost 4% richer than target why you choose the -2.5% not -4% in the maf rescaling
