Originally Posted by
wingracer
What's not true? I never said go flat out cold. Quite the opposite.
Speaking specifically of the bearing, rapid rpm changes when cold cause the balls to skid, damaging the races. It's not rpm that hurts them, it's the rpm changes.
What Im saying, at least I think Im trying to say, is that in a ceramic VS steel bearing scenario, the ceramic does not need lubrication in the fuel to get it to perform well - they go all out no matter what, whereas the steel bearing needs a bit of lube and heat to get it to be at its best inside an engine.
The heat also gets the engine running best so that the tune it has doesn't (at least it shouldn't) change throughout the race, thats why you go a little richer during a 20+ minute race, so that it doesn't overheat causing damage and making the engine flame-out.