The thing is you have to run them pretty lean to get those top speeds so are they real world numbers. Most wont run them that lean (if they know what they are doing) and most dont run 33% either because they dont race or because of the cost of 33%. Yeah some will say yeah well they are radar tested and they ran that fast, I'm not saying they didnt. But how many people run there rc engine's that lean, they way they ran them was probably so lean that they will only get maybe a gallon out of it if you ran it that way constantly.

So yeah they got those speeds, but at what cost do want those speeds. Are you willing to get a gallon out of your stock engine's for those speeds.