Algodoo

For a second I was thinking "Okay, no need to show me you're better" but this is pretty cool! But yeah, do you know if you can get your engine to idle lower...? It is revving like real high for an engine, for a real engine it is idling at 3000 RPM. Other then that real good!

I can agree to the fact that it's idling at a very high speed relative to it's full throttle speed. But, I've actually built some rotary spawn engines that idle only like 100rpm slower as fast as they go at full rpm.

I generally like my engines to run really fast, and if I can't do that then I like huge torque instead. most of my engines (my more recent ones) can top out at 120-130 rad/s which is like 1200 rpm in algodoo, but more like 12000 rpm in a real car. But idle speed dont matter much. The real reason you can't have a spawn/collide engine go much faster than the speed I described is because the mechanism itself can withstand higher speed (I generally test my engines unpowered at 1500 rpm, or higher if I need extra presicion), but the force the collision/spawned geom applies onto the piston can cause instability at higher speed. There are some exceptions though... (like this, but you couldn't really call it a "piston" engine )

Sorry for the huge block of text

Hehe, alrighty xP

BTW, your engines aren't actually too bad. Not much power, but most of them are smooth and have hardly any vibration. That's something I've tried to accomplish ever since Phun

Hehe, thanks man... it just takes ALOT of practice xD