AFAIK in ChampCar it is done by increasing the max. boost for some seconds, in F1 by temporarly increasing the rev-limit.
The F1 variant wouldn't work, because there is no engine wear and the cars are already driven at max revs
The Champ Car variant wouldn't work because of the lack of turbo in the FO8
It's still a +/-0 for me, I don't mind it being in the FO8 or the GTRs (and maybe later the BF1, when there is engine wear), but I don't need it.