The sticking point on this project is engine management. In an ideal world I would replace the factory ECU with a standalone device. These cost £1k plus however so that is out of my price range. There is a device called 'megasuirt', which is a basic ECU kit available from the US for about $280. To make this work with my engine would require some modifications. I wasn’t happy with the quality and connectors supplied with the unit either.

I spent some time reading forums of other peoples upgrades. It seems that a common option is to use a 'piggy back' ecu to modify the fuel maps to accommodate the turbo. The device interrupts sensors (lambda, manifold pressure etc) and modifies the value to trick the ecu into supplying more fuel. Again these seem to be very expensive for what they are. around £800+ from my research. Obviously, you are paying for the software that goes with it but it seems a bit steep for a microcontroller in a box.

The route I am going down is to make my own piggy back ecu. Attempt one is make the factory ecu fuel correctly by interrupting the manifold vacuum sensor. If this does not work, I will monitor the status of the fuel injectors and configure my device to hold them open for a longer period (by grounding them externally of the factory ECU). The timing here will be critical and I have limited experience with micro controllers... Wish me luck!