Subpage of Base setup menu

Rev limit / Overrun / Safety

Fuel Cut RPM Limit
This is the main rev limiter that is used. It cuts all fuel when limit is reached. This method makes little or no noise from the engine.

Fuel Cut RPM Limit when ALS
Same method as above, but only active when ALS button is pressed.

Soft Ignition Cut - Maximum RPM + Control Range
This is a soft ignition based rev limiter that ramps up the cut level over the control range, and cuts all spark at maximum RPM + control range. This method has medium noise, take care when used with power adders (turbo, nitrous, supercharger).

Hard Spark Cut Limit
Special mode only recommended when running only ignition control with your VEMS ECU. Sets a hard spark cut limit at Fuel Cut RPM Limit - 200 rpm. This is a very noisy method that is hard on the engine components.

Overboost Fuelcut Above
Cuts all fuel above this pressure. Prevents dangerous unplanned boost peaks on engines with forced induction.

Overrun Fuelcut

• Fuelcut below (Pressure based): Below this pressure, all fuel is cut.
• Fuelcut RPM : Above this RPM, with TPS below idle threshold, all fuel is cut. During afterstart 400RPM is added to Fuelcut RPM
• Fuel Resume RPM : At this RPM, fueling is resumed even if TPS is below idle threshold.

Partial Fuelcut Mode
This is an advanced setting only used with ALS setup without throttle. Only active when Fuelcut - Fuel Resume = 1100 rpm.
Don't touch when using PID idle control.
Details here: Partial iac

Boost Target Reduction Above MAT
Lower the boost target and (optionally) reference duty above this intake air temperature.

• boost reference duty reduction 1.5625 % per degree over threshold
• boost target reduction 4kpa per degree over threshold

Boost Target Reduction Above EGT
Lower the boost target and (optionally) reference duty above this exhaust temperature, measured on EGT channel 1.

• boost reference duty reduction 1.5625 % per 4 degree over threshold
• boost target reduction 1kpa per degree over threshold

Fuel Added Above EGT Limit
Adds extra fuel above Boost Target Reduction Above EGT.
Lambda target will be "enriched" according to this:

• lambdaTarget * ("EGT channel 1" - "Boost Target Reduction Above EGT")/100 * (Fuel Added Above EGT Limit/100)