Fuel System Calculator
Fuel System Calculator
JD Tuning Motorsports | Dyno Laptop MVP
Live Engine Data IDLE
RPM
Engine speed
900
Boost (psi)
Manifold pressure
0.0
AFR
Wideband
14.7
Timing (°)
Ign advance
12
IAT (°F)
Heat soak affects power
90
Coolant (°F)
Temp safety
180
Knock: 0
AFR: OK
IAT: OK
Click a cell in the maps, then adjust. Run a dyno pull and watch the highlighted cells show where the engine “spent time” during the pull.
Calibration Fuel + Timing
Fuel Map (Trim)
Cell: —
Fuel trim is simplified: higher value = richer (lower AFR). MVP range: -5 to +5.
Ignition Map (°)
Cell: —
Timing is simplified: higher timing may increase power until knock. MVP range: 6° to 26°.
Dyno Graph
Peak: —
Diagnostics MVP
Knock Report
0 events
Severity (0–100)
No knock detected.
Spark Plug Read
—
Run a dyno pull, then click “Inspect Spark Plug” to get a simplified plug reading.
Notebook
Suggestions