G
Guest
·The fuel cut is programmed into the ECU based on throttle angle and air flow meter output(slightly different levels depending on the vehicle and the software within the ECU). Fuel cut defencers limit the output of the air flow meter so the ECU thinks it is seeing 1bar boost but they allow the boost to be wound up to any level. You can imagine the effect of the ECU outputting fuel and ignition figures for 1 bar whilst the engine is seeing 1.2bar!
The original map scaling of fuel and ignition parameters allows complete mapping up to 1.6 bar but of course the fuel cut stops this sort of boost being run.
When we (Power Engineering) re-map the ECU we raise the fuel cut to whatever level is require for the conversion.
We would urge owners not to find their fuel cut level because this is the easiest way to bend connecting rods.
With the fuel cut altered we can then re-map for many different parameters including 95 fuel or 1.6 bar depending on the level of other modifications carried out.
We also re-map the boost control functions to automatically increase boost without the use of external alterations to the boost control valve. (Although the standard boost control system is difficult to control above 1.3 bar, for higher boost we use a completely separate boost control system)
There is a huge amount of fuel and ignition mapping carried out with our ECU and even as low as 2000 rpm we are seeing significant torque increases over the standard ECU.
The re-programming is completely undetectable by dealers and the ECU retains full OBD II diagnostic functions and climate and AYC controls.
After the conversion we can at any stage upload new maps if further tuning is required.
I hope this helps shed some light on the ECU functions.
The original map scaling of fuel and ignition parameters allows complete mapping up to 1.6 bar but of course the fuel cut stops this sort of boost being run.
When we (Power Engineering) re-map the ECU we raise the fuel cut to whatever level is require for the conversion.
We would urge owners not to find their fuel cut level because this is the easiest way to bend connecting rods.
With the fuel cut altered we can then re-map for many different parameters including 95 fuel or 1.6 bar depending on the level of other modifications carried out.
We also re-map the boost control functions to automatically increase boost without the use of external alterations to the boost control valve. (Although the standard boost control system is difficult to control above 1.3 bar, for higher boost we use a completely separate boost control system)
There is a huge amount of fuel and ignition mapping carried out with our ECU and even as low as 2000 rpm we are seeing significant torque increases over the standard ECU.
The re-programming is completely undetectable by dealers and the ECU retains full OBD II diagnostic functions and climate and AYC controls.
After the conversion we can at any stage upload new maps if further tuning is required.
I hope this helps shed some light on the ECU functions.
