May I ask why you want to do this? You already have 100bhp, why not spend the money on others mods like exhaust and induction and get the 125bhp that way? For the money you could end up spending on the engine conversion you could probably put itbs on there
'kill the engines/turbos' 'To be fair, I could go on all night, but I sometimes think my knowledge is wasted sometimes on here' Umm, cooper s doesn't have a turbo