Every engine need the oil to be warm to lower friction, however temperature that the rest of the the engine need doesn't need to be much, the cooler engine is the more thermally stable it is. The induction is a different issue, it need enough to add the appropriate heat or energy to the fuel to ensure even distribution without excessively sacrificing air density. The more efficient the carb and induction is the lower the temps can be, and the more power you can make because the air is denser. Next time you go to a national event ask the Pro Stock guys why they cool the water through the engine to 70 degrees or lower...