It has been too many years since 2012 when this project has started - and now we have two units of microRusEfi running a v12 with DBW just for fun.
Anyone can make himself his own microRusEfi for about $50. Well, there are caveats - you would have to be making ten microRusEfi for about $500, and there will be no case. Step #1: order 80% assembled PCBs from jlcpcb, about $160 for ten boards. Step#2: order the missing eight components per board from mouser. Step#3 solder those eight components - and you get yourself a fully programmable ECU for 4 cylinders with DBW.
1, TLE88882QK, U2, LQFP-100_14x14mm_P0.5mm_THERMAL, TLE88882QKXUMA1
2, PTS636 SM43 SMTR LFS
It’s still not the Smart ECU we are dreaming about, it’s still a steep learning curve - but maybe that’s your kind of fun.