[DustyFP]

Not to dampen anyone's enthusiasm, but is there actual evidence suggesting that exhaust smoke is produced at 100%+ throttle from any of the aviation engines represented in the game? It seems to me, given that in internal combustion engines black exhaust smoke is the product of incompletely burned fuel, that this would be a strange thing for engines running at wide open throttle (highest intake airflow) to produce if the mixture is properly adjusted.

I'm sure it can be done, but I wonder if it should be.

A quick read through any Spitfire pilot's biography will tell you that when the throttle was maxed out a large belch of black smoke would come out of the pipes in any but the newest engines. It didn't STAY on, as the engine would quickly recover the appropriate fuel/air mix. But it certainly happened.