So I had an idea

OP Here.

You guys are still all misunderstanding what I was doing and thinking of this:

>en.wikipedia.org/wiki/Opposed-piston_engine

Which is not at all like what I was proposing.

Not going to bother explaining any further to you imbeciles.

That's a steam engine, fuckwit. External combustion, not internal.

If you're trying to make an internal combustion version of a steam engine, then you would need to have a separate engine running and using the exhaust gases to drive the steam portion of it.

All of these systems you're linking are the opposite of what you're trying to do. These systems work because the crank is powering the piston, and are running at low speeds because they have parts that move long distances. Engines turn really fast so you need to keep the distances short, and the parts really strong.

Because you need strong parts, that will be more material in the combustion chamber, and less space for it to occur.

How will spark plugs fit in? You can't put them at the top of the cylinder because that's where the cranks are.

You'll eventually need to unite the crankshafts to a single output.

This is all way too much trouble for what it's worth mang

All this.

No, noone thinks you are talking about opposed piston. Everyone thinks you are talking about your own retarded idea.