THE CALIBRATION BAY / SIX REPAIR JOBS
Dyno Notebook
Read the pull. Repair the table. Find the missing torque.
Run a dyno pull to measure the faulty tune. Adjust fuel and spark in each band, then test again. Higher lambda means leaner mixture: add fuel to lower it. Knock calls for less spark advance; too much retard loses torque.
Pass every band: mixture within ±0.030 lambda of target, zero knock, at least 97% reference torque, and injector duty at most 90%.
Run the first pull to diagnose this engine.
How to read the notebook · source & model
Lambda is measured air-to-fuel ratio divided by the fuel’s stoichiometric ratio. The target here is a rich power mixture, about 0.874. A larger fuel-table estimate commands more fuel. Spark offsets are degrees of advance: negative means later ignition.
The torque figure is the worst sampled point relative to the uncorrupted reference tune in that band. This prevents a strong peak from hiding a weak region. The plotted points run from 2,000 to 6,500 rpm; the two engines differ in geometry and calibration. Inspector readings come from ECU Lab’s air-mass, combustion, knock, friction and injector model.
These are illustrative simulated repair jobs, not settings for a real engine. The animated engine is a diagram, not a mechanical timing model. Original gameplay and GPT texture art; simulation source ECU Lab, pinned October 28, 2026. MIT license.