Setting Spotlight #3

Welcome back to another Setting Spotlight, Aces people! Today, we’re going to be going over another batch of settings to help you tune your build to your heart’s content. As always, these will be added to the Settings Glossary in full, searchable form soon.

Let’s get started!

• Speed Raise Air:
  Sets the extra startup idle air versus operating condition.
  Increase values if RPM falls or the engine stalls immediately after starting; decrease them if startup RPM flares too high.
• Startup Air Fast Decay Cycle:
  Sets the fast-stage decay timing for extra startup idle air.
  Increase it to keep the fast-decay stage active longer or decrease it to move toward normal idle air sooner; adjust for startup flare versus stall tendency.
• Startup Air Fast Decay Cycle:
  Sets the fast-stage decay timing for extra startup idle air.
  Increase it to keep the fast-decay stage active longer or decrease it to move toward normal idle air sooner; adjust for startup flare versus stall tendency.
• Startup Air Slow Decay Cycle:
  Sets the slow-stage decay timing for the remaining startup idle air.
  Increase it to retain extra air longer during warm-up or decrease it for a quicker return to normal idle control.
• Engine Max Rev:
  Sets the primary maximum engine-speed limit.
  Choose a value safely below the mechanical limit of the engine and valvetrain; raise it only after confirming the combination is capable, or lower it for greater protection.
• Rev Limiter Enable:
  Enables the main engine rev limiter.
  Keep it enabled for normal operation and disable it only for controlled diagnosis when another safe limit is in place.
• FPS (Fuel Pressure Sensor):
  Defines the pressure values paired with the fuel-pressure sensor voltage table.
  Enter the installed sensor's datasheet values and verify the reading with a mechanical gauge; do not use this table to correct an actual fuel-pressure problem.
• FPS Coef A:
  Sets a coefficient in the sensor's mathematical calibration.
  Change it only when using the specified sensor-calibration equation and enter the value from verified engineering data; arbitrary changes will make the displayed measurement inaccurate.
• FPS Coef B:
  Sets a coefficient in the sensor's mathematical calibration.
  Change it only when using the specified sensor-calibration equation and enter the value from verified engineering data; arbitrary changes will make the displayed measurement inaccurate.
• FPS Filter Coef:
  Sets the signal filtering/smoothing coefficient for this channel.
  Increase filtering for a steadier reading with more delay, or decrease it for a faster response with more visible noise; change it only if logs show noise or excessive lag.
• FPS Type:
  Selects the fuel-pressure sensor calibration method or table.
  Choose the option matching the installed sensor and verify the displayed pressure against a mechanical gauge before enabling pressure-based compensation.
• FPS x Point:
  Defines the voltage breakpoints for the fuel-pressure sensor calibration (volts).
  Change them only to match the installed sensor's voltage-to-pressure data, keeping each voltage paired with the correct pressure value.
• Fuel Level:
  Defines the fuel-level values paired with the sender-resistance table.
  Change them only to calibrate the installed fuel-level sender, keeping each percentage paired with the correct resistance.
• Fuel Level Resistance:
  Defines the sender-resistance breakpoints used for fuel-level calibration.
  Enter the measured or published resistance values for empty-to-full positions and keep them paired with the correct fuel-level percentages.
• OPS (Oil Pressure Sensor):
  Defines the pressure values paired with the oil-pressure sensor voltage table.
  Enter the installed sensor's datasheet values and verify the reading with a known-good gauge.
• OPS Coef A:
  Sets a coefficient in the sensor's mathematical calibration.
  Change it only when using the specified sensor-calibration equation and enter the value from verified engineering data; arbitrary changes will make the displayed measurement inaccurate.
• OPS Coef B:
  Sets a coefficient in the sensor's mathematical calibration.
  Change it only when using the specified sensor-calibration equation and enter the value from verified engineering data; arbitrary changes will make the displayed measurement inaccurate.
• OPS Type:
  Selects the oil-pressure sensor calibration method or table.
  Choose the option matching the installed sensor and verify the displayed pressure against a known-good gauge.
• OPS x Point:
  Defines the voltage breakpoints for the oil-pressure sensor calibration (volts).
  Change them only to match the installed sensor's voltage-to-pressure data, keeping each voltage paired with the correct pressure value.
• Advance Coef:
  Scales the overall ignition-advance calculation.
  Increase it to apply more of the calculated timing or decrease it to reduce timing globally; use only for controlled broad adjustment and verify the entire map afterward.
• Battery Voltage:
  Defines the battery-voltage breakpoints used for voltage compensation.
  Change them only if the table needs to cover a different electrical-system range, keeping the points in ascending order.
• Coils Dwell Time Type:
  Selects whether coil dwell is fixed or determined from a voltage-based table.
  Choose the method that matches the ignition hardware and available dwell data, then configure the corresponding value or table.
• Coils Output Dwell:
  Sets fixed ignition-coil dwell time when the fixed-dwell mode is active.
  Enter a value appropriate for the coil and battery voltage; too little dwell weakens spark, while too much can overheat or damage coils and drivers.
• Cranking Ignition Timing:
  Sets ignition timing while the engine is cranking.
  More advance can improve starting but may cause kickback; less advance reduces kickback but can slow starting, so change it in small steps.
• Cruise Ignition Timing:
  Sets the base ignition timing used during steady cruise when the fixed cruise value is active.
  Increase cautiously for efficiency only if the engine remains knock-free; decrease it if knock, surge, or excessive cylinder pressure occurs.
• ECT x Point:
  Defines the engine coolant temperature breakpoints used by this table (°C).
  Change these points to place more table resolution in the operating range you need to tune; keep them in ascending order and then review the table values after changing the axis.
• Engine Max RPM:
  Sets the primary maximum engine-speed limit.
  Choose a value safely below the mechanical limit of the engine and valvetrain; raise it only after confirming the combination is capable, or lower it for greater protection.
• Follow Base Timing:
  Defines ignition timing used in the follow/off-idle operating region across RPM and load.
  Adjust cells to improve transition and drivability, verifying that timing changes remain knock-free.
• Follow MAP x Point:
  Defines the manifold pressure/load breakpoints used by this table (kPa).
  Change these points to place more table resolution in the operating range you need to tune; keep them in ascending order and then review the table values after changing the axis.
• Follow RPM:
  Defines the engine speed breakpoints used by this table (RPM).
  Change these points to place more table resolution in the operating range you need to tune; keep them in ascending order and then review the table values after changing the axis.
• IAT Adjust:
  Adds or removes ignition timing based on intake-air temperature.
  Retard timing at high temperatures when needed for knock protection; avoid adding timing solely to compensate for an incorrect IAT sensor calibration.
• IAT x Point:
  Defines the intake-air temperature breakpoints used by this table (°C).
  Change these points to place more table resolution in the operating range you need to tune; keep them in ascending order and then review the table values after changing the axis.
• Idle Base Timing:
  Defines the base ignition-timing table used in the idle region.
  More advance generally adds idle torque and less advance removes it; tune with the idle-control strategy so timing correction retains authority in both directions.
• Idle ECT Adjust:
  Adds or removes idle ignition timing based on coolant temperature.
  Use it to improve cold or hot idle stability, tapering the correction toward the normal-temperature value.
• Idle Ignition Timing:
  Sets the base ignition timing used at idle when the fixed idle value is active.
  More advance can raise torque and idle speed; less advance can reduce torque, and changes should stay within a stable, knock-free range.
• Idle MAP x Point:
  Defines the manifold pressure/load breakpoints used by this table (kPa).
  Change these points to place more table resolution in the operating range you need to tune; keep them in ascending order and then review the table values after changing the axis.
• Idle RPM Error:
  Defines the idle-speed error breakpoints used by the fast ignition correction.
  Change them only to reshape where timing correction becomes more aggressive, keeping the points ordered around zero error.
• Fast Idle Timing Correction Table:
  Defines the rapid ignition-timing correction applied for idle-speed error.
  Increase the correction for faster RPM recovery or reduce it if idle hunts or oscillates; keep enough timing range in both directions.
• Idle RPM x Point:
  Defines the engine speed breakpoints used by this table (RPM).
  Change these points to place more table resolution in the operating range you need to tune; keep them in ascending order and then review the table values after changing the axis.
• Ign Advance Max:
  Sets the maximum ignition advance the strategy is allowed to command.
  Raise it only when the engine safely requires more timing; lower it to cap advance and protect against excessive spark lead.
• Ign Advance Min:
  Sets the minimum ignition timing the strategy is allowed to command.
  Lower it to permit more retard when a strategy needs it, or raise it to prevent excessively retarded timing; consider exhaust-temperature effects.
• Ign Dwell Time:
  Defines ignition-coil dwell time across battery voltage.
  Use verified coil data; typically more dwell is needed at low voltage and less at high voltage, while excessive dwell can overheat coils or drivers.
• Ign Protection Strategies:
  Selects or enables the available ignition-protection strategy/profile.
  Choose the mode that matches the engine and intended protection behavior, then verify all related thresholds and limits.
• Ign Startup RPM:
  Defines the engine speed breakpoints used by this table (RPM).
  Change these points to place more table resolution in the operating range you need to tune; keep them in ascending order and then review the table values after changing the axis.
• Ignition RPM:
  Defines the engine speed breakpoints used by this table (RPM).
  Change these points to place more table resolution in the operating range you need to tune; keep them in ascending order and then review the table values after changing the axis.
• Lock Ignition Timing:
  Locks ignition timing at a fixed value for synchronization or diagnosis.
  Enable it while checking timing with a light, then disable it for normal mapped spark control.
• MAP x Point:
  Defines the manifold pressure/load breakpoints used by this table (kPa).
  Change these points to place more table resolution in the operating range you need to tune; keep them in ascending order and then review the table values after changing the axis.
• MBT Timing:
  Defines the base ignition-timing map intended to approach maximum brake torque across RPM and load.
  Change cells only with controlled testing; more advance can add torque until the knock or MBT limit, while too much can damage the engine.

We’re updating and defining more variables all the time. Watch this space to learn how you can get the most out of your Aces system.

Happy Tuning!