The ME system features a default layout for the Limiters page.


There are two types of limiting, Hard Cut and Soft Cut. Hard Cut is when the engine is literally not able to electronically rev higher (it could still be mechanically revved higher buy down-shifting incorrectly at speed etc) but the ECU will no longer provide an ignition spark, fuel injection events, or both (depending on Mode in the Limiter Settings) once the Lim. RPM is reached (looked up from the Lim RPM table, see below).


The Soft Cut RPM Offset is how many RPM BELOW the Hard cut (in the below table  we have a hard cut (at operating temperature) of 8000 and a soft cut setting of 200, meaning soft cut will start to engage at 7800rpm). Once we reach 7800 RPM the ECU will progressively cut a percentage of fuel/ignition from 0-100% as you approach the true hard cut value.


The Lim RPM table sets the engines max RPM (Hard Cut) based on engine temperature. In the below image you can see that when the engine is very cold, it is limited to 4500 RPM, ramping up to the max engine speed of 8000RPM when it reaches operating temperature of 60*C.