4

Actually the current answer is wrong. If you wait longer you will have a turbo that last longer (not stronger). The more you do them the longer it will stay once you stop doing any. You can just try it in an arena, do a 3 times very short turbo twice and go in straight line without doing anything. Repeat with doing longer, it will last longer. This is ...


3

I'm pretty sure the boost is at its maximum potential the moment the power bar turns red. And even if there does happen to be a slight increase in speed, it isn't significant enough to risk the many (of which some will be inevitable) backfiring boosts.


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