Algodoo

Very nice, I like the simple fuel pressure control for the throttle system

How do you trigger ignition though? Seems like it doesn't work very well at high RPM. or is it some kind of limiter?

Ignition is cut above 130 RPM when the ignition limiter is active.

To turn off the limiter, just click the box on the right of the screen with a cursor icon next to it (while the simulation is running.)

There is a cam gear in the block if you look closely. The ignition is triggered by cam angle with a 10 degree firing window.