# Packaged 350Z source engine curve runtime check (r288)

The packaged viewer loaded with `?debug&route=450&distance=510&radius=120&car=350Z`.
Before input, the live debug state reported the 350Z and
`engineCurveFactor = 1.50` at rest. After 2.4 seconds of W and a short release,
it reported `engineCurveFactor = 1.55`, speed `9.04 m/s`, and throttle command
`0.61`. The page was ready and Chrome emitted no JavaScript exceptions.

This runtime check confirms that the selected 350Z stock curve, restored 240SX
reference curve, and existing bounded comparison execute in the packaged
viewer. Both measurements sit at the viewer's `[0.65, 1.55]` upper clamp or
near it, so they do not establish the underlying retail acceleration ratio.
The 2.5 m/s² force baseline, clamp, and conversion to world speed remain
viewer approximations. Retail Engine output still needs a controlled free-roam
XP trace to map it to body acceleration.

The capture is in the [visual review feed](../webgl-city/review/index.html#r288-stock-engine-curve-runtime).