Its the shaft that drives the wheels.
I don't beleive its teh cam,
but due to a cam shaft being on the same rotation as the engine it might be the same rpm...
4 pistons means for explosions per revolution, which means 4000 explosions = 1000 revolutions.
i think the cam and the otto cycle are =
yea i thought crankshaft, but i wasnt sure if it was the right word. LMAO keep it real.