Algodoo

Just a little concept spawn engine I threw together. The "explosion" (the spawned circle) starts small and gets bigger as the time goes on. Like in a real engine. It makes it a tiny bit more realistic but reduces power by a huge factor. The only positive side to this that I can think of is a better(?) power curve. And by better I mean more "realistic".

I - toggle ignition
S - starter

For throttling use the lever on the right.

P.S. The ignition system is really bad and often skips spawns but I didn't really need anything better for this scene.

Edit: Added VVT. With this concept advancing the engine really makes a difference at higher RPMs. Also upgraded power.