I could update the computer, like with [this one](https://ecumasterusa.com/products/ecumaster-emu-black-standalone-ecu?variant=8318139039805). This would let me install a number of sensors and controllers on the engine to make it run more efficiently. This was used in https://www.youtube.com/watch?v=jZ38C-M3tyk to control spark, air intake, and fuel injection. It measured crank rpm and a timing pulse, as well as exhaust quality? oxygen? unclear. In the case of that video, it gave a 14% increase in the power at the wheels.