Algodoo

That engine needs a lot of work. first make the movement of the piston half of what it is now, so you get more speed. Then spawn circles that fit entirely in the cylinder (radius 0.375)
Those shapes upon the engine are needlessly large, if you want more power you have to make them collide to the balls, and you can make them smaller (half the size)

Also try using 120 or 200 Hz... I know it will give you less power but realistically talking if you need 600 Hz to make an engine work then the engne is crap

And instead of killing the balls with timeToLive you should put a timetolive of like 1 second just in case balls get off the engine, and you should put a rectangle that deletes the ball when it gets down enoiugh

The pistons have to be heavy (use density 30) and NOTHING has to have friction or restitution

Also can you make the lasers toggled?

Thanks for your suggestions. I'm working on improving the engine now. And by the way, the lasers are togglable- hit I.

haha yeah that was a slip up, i noticed right after i posted that

lol.