Two reasons:

1) From what Ive seen they dont actually make the sort of difference I want here, which is for the car to have torque at 2500rpm not at 5Krpm when the turbo spools currently.

2) I actually just really fancy having a go at compound charging anyway "just because" as I have never done it before


Not looking for alternatives, perhaps my initial post wasnt clear enough, I just want to know if there is a flaw in the way I want to do it?