what affect of pistons on high temperature?

The wording of your question is,well,a bit ambiguous.I would be grateful if you could specify which of the following questions is most representative of what you want to know:(1) What are the effects ...Q2,please .According to my knowledge in high school physics, which is quite limited, pistons do raise temperature when they try to compress air because, by so doing, pistons turn some of the kinetic energy into heat energy.However, if the original temperature is already high, the effects of pistons on it is unknown to me.