Are polished engines not as good as the original textured finish?
Polished aluminum engines look much nicer, and they do require maintenance to keep their shine. Technically the reduction of surface area does slow down the rate of heat dissipation of the motor. The surface of the engine block is only a small component to the dissipation of heat. Most of the heat in the engine is at the end of the pistons where the combustion happens and the fins there dissipate much of the heat. There are also other factors that effect heating such as valves and gas to air mixture, and how one rides his Chang Jiang 750 sidecar. How well the polished engine keeps its polished shine depends on the workmanship of the polishing and also the metallurgy of the engine. A very important point about high grade polishing. If any chemical or water is used to clean a polished engine it will immediately start to tarnish. Polished engine requires extra maintenance to keep its shine.
