How do they get 180 bhp at the rear wheels out of a GDI? I would have thought even with a trick exhaust, and a change of cams, you would still have problems with the fuel map which would be beyond the possibility of a small enterprise to sort out. Fitting throttle bodies, as far as I can tell, is completely out of the question.

I'm not saying that it can't be done, just that it would be a surprise to me if someone has managed it.

Peter

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