Takumi is at the point where he's in a car that handles better than his car, has considerably more horse power (expressed differently), and he's finding that in this situation, if he were racing with someone of equal skill level, he would lose. His dad proved that point to him beautifully, took out Takumi like a cheap date.

He's got alot of thinking to do, but he does have the advantage he's always had, which is the weight of his car. I'm sure Takumi could go out and attempt to mod his car further, but that's not the point of Bunta's lesson. If anything, this is going to progress Takumi further, or just totally give up. Since this is the series, I lean towards progressing further, since there's most likely more stages after this one ^.^