what does bore and stroke mean. does bore mean the width, and stroke men the taller. im so confused when they mean "430 stroker, and big bore 686"

 

Bore is the diameter of the piston (across). Stroke is how far the piston moves up or down in the cylinder. A stroker motor has a different crank that allows the piston to travel further down the cylinder to collect more air for compression on the way back up. A bored motor has a wider piston installed for pretty much the same reason, more displacement equals more air to compress and ignite.

Longer stroke motors don't rev as high or as fast as a shorter stroke motors but they develop more torque. Overbore (piston width is greater than stroke length) motors rev higher faster than the same displacement engine with smaller pistons and a larger stroke.

If you think that's simple, we can talk about rotary engines:-)

 

CAn we talk about rotary engines? is it difficult to understand?[img]i/expressions/face-icon-small-smile.gif[/img]

 

Quadwarrior broke more than his wrist [img]i/expressions/face-icon-small-sad.gif[/img] j/k

 

what the hell does that mean?

 

J/K means just kidding[img]i/expressions/face-icon-small-smile.gif[/img]

 

talking about this