Engine simulator for JTEC PCMs

Firmware-faithful fuel & spark · Chrysler JTEC PCM Tune: starting…

Operating point

Injectors

psi
Pulse width and duty are rescaled as if the tune were corrected for the selected injector — the fuel mass stays what the cal commands. Effective flow scales with √(rail ÷ rated pressure); the stock injector is rated at its 49 psi rail, the others at the 39 psi base standard.
Injector pulse width
—ms
Spark advance
—° BTDC

Spark advance vs engine speed

Spark advance (°) Pulse width (ms) current RPM

Fuel chain

Delivery estimate