Speeduino Classic Mini SPI

Hey pistonheads. Hoping to tap into the collective hive mind to help with a few things. I’ve recently acquired a 1995 Rover Mini Cooper SPI. Love the car as is its brilliant and will soon be better once the suspension has been rebuilt. I am wanting to make the Mini more tuning friendly and I’m aware that the standard cooper ECU’s were conservatively tuned from the factory. This combined with other issues such as lack of accessibility to modify or rectify means that I’d like to get rid of the rover ECU. It also opens the door to making use of any performance upgrades I wish to install in the future.

So what are my options with regards to plug and play or DIY. I’m aware of the Specialist Components kit however this is £1200 before you add VAT and a bit out of my price range at the moment. Mega squirt and Microsquirt are options however I don’t have any information about these fitting to the Mini’s wiring loom and then initial mapping. These are about £400 as is which is more palatable. The option I want to try is the Speeduino path. I can get a kit for £150 and build it and then program it with arduino and tuner studio. This presents the same issue as the megasquirt and microsquirt family in that there isn’t any documentation online of people doing this and integrating it into the car.

Has anyone got experience of doing such a thing and any notes on what needs to be wired into the ecu, either megasquirt/microsquirt or Speeduino as a minimum and how to get it up and running.

Cheers for the help in advance