If the weight was 4000 lbs it still would be only 823 hp going by the mph. I do not think it would weigh that much.
According to the calculators on the Wallace racing web sight.
Yes but he has to shift, it is a manual trans. I am not defending him at all, its just I saw what it put to the tires. So he either sucks at shifting or the power is so peaky that it is in a very narrow band. Or it could be that he is backing down the boost? Who knows all I know is that I have a lot less variables than he does.