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verification/YZ125_BASELINE.md

@@ -39,7 +39,11 @@ These port dimensions and compression interpretation require measured validation
 Combustion has an estimated .8 ms minimum burn duration; timing and duration are
 frozen for each active charge. The estimated ignition curve retards above 6000
 RPM rather than continuing to advance toward 40 degrees. Neither is a measured
-factory CDI/flame model. Fuel remains ideally calculated at port closure.
+factory CDI/flame model. Fuel is now metered by effective pilot, needle and main
+jet areas using simulated venturi/static pressure signals. It is transported
+through the intake, crankcase and cylinder as a conserved species; the effective
+jet dimensions and wall-film constants are estimates rather than measured TMX38
+calibration.
 
 Mechanical friction now includes a quadratic windage term. The two-stroke uses
 FMEP [bar] = .4 + .09*mean_piston_speed + .0009*mean_piston_speed^2, converted to
@@ -63,6 +67,12 @@ steady speed. An analytic load-balance test checks 10 Nm and 1 kW at 100 rad/s.
 
 ## Measurements and limits
 
+The sweep and capture numbers below are historical, before removal of scheduled
+late firing and addition of exhaust oxidation. Current transient regression:
+peak 12954 RPM, recovered idle 2583 RPM, rendered peak .0985, and 87 normal CDI
+firings in the first coast second. No imposed pop cadence remains. Recalibration
+and listening validation of the finite-rate exhaust chemistry remain necessary.
+
 The fixed-speed benchmark imposes speed as an ideal motoring/absorbing dyno and
 records shaft output. It runs one simulated second per point and averages the
 last half. All points fired approximately once per revolution, had zero pipe
@@ -70,25 +80,27 @@ positivity repairs, and cost about .53-.58 wall seconds per simulated second.
 
 | RPM | Straight kW | Racing kW |
 | ---: | ---: | ---: |
-| 6000 | 4.02 | 6.27 |
-| 8000 | .63 | 5.53 |
-| 10000 | 2.43 | 10.53 |
-| 12000 | 3.96 | 14.32 |
-| 14000 | 3.60 | 12.38 |
-| 17000 | -.80 | -3.94 |
+| 6000 | 1.43 | 3.82 |
+| 8000 | .41 | 4.92 |
+| 10000 | 2.62 | 10.02 |
+| 12000 | 3.46 | 11.87 |
+| 14000 | 1.78 | 9.42 |
+| 17000 | -3.65 | -5.20 |
 
 This coarse sweep peaks near 12000 RPM; it is not a validated Yamaha dyno curve.
 Negative power at 17000 means the virtual dyno must motor the engine. Free-rev
-speed differs from peak-power speed: full pedal with the straight pipe still
-approaches 16950 RPM after eight seconds. This remains an unresolved calibration
-limit. The standard transient reached 16128 RPM, recovered idle at 3159 RPM,
-and launched the motorcycle to 61.3 km/h without repairs or nonfinite output.
+speed differs from peak-power speed and remains an unresolved calibration
+limit. The standard .6-pedal racing-pipe transient reached 15954 RPM, recovered
+idle at 3151 RPM, and launched the motorcycle to 57.4 km/h without repairs or
+nonfinite output. Its first second after throttle release contained 11 sparse
+late firings rather than continuous perfect-cycle combustion.
 
-Six-second .6-pedal field captures had no clipping: racing rendered peak .201,
-straight .554. Firing cadence, port timing and geometry are improved, but exact
-YZ125 sound still requires listening and further combustion/scavenging work.
+The standard transient rendered peak .395 without clipping. Firing cadence,
+port timing and geometry are improved, but exact YZ125 sound still requires
+listening and further combustion/scavenging work.
 The first-order pipe flux damps high-frequency content; the compact source,
-constant-gamma gas, ideal fueling, fixed power valve, single-zone mixing and
+constant-gamma gas, effective jet calibration, single-phase transported fuel,
+fixed power valve, single-zone mixing and
 empirical monitoring/environment filters limit fidelity. No engine sound sample
 or synthetic two-stroke firing track has been added.