RE: 16% Nitro For MGT TT21 engine, is it too low?
I've not had troubles with Dynamite BlueThunder 20% fuel in my road car or MT's. You may have troubles with idling using very low nitro content. Also, I think a higher nitro content actually cools the engine, but I've heard very valid arguments both for and against this so don't take my word as law on this.