This is the Speeduino, a full featured DIY standlaone ECU which YOU can have for less than $160!!!
This is only a quick explainer without going into the nitty gritty detail but I just wanted to spread the word!
Links : -
Speeduino Home - https://speeduino.com/home/
DIYEFI - https://diy-efi.co.uk/
Speeudino YouTube page - https://www.youtube.com/channel/UCGEpmUxQFMmcKyCW0JLBBaw
Speeduino Clips - https://www.youtube.com/watch?v=xgNpUEs6CWE
Speeduino installation - https://www.youtube.com/watch?v=iH9lp-Nms-o