I know none maybe WRC focus, but we don't have that king of money I guess... I street life there is simple rule. low CR - high boost, high CR - low boost.... and for high CR/low boos't car you don't need huge turbo, but I dont know why are they using them, maybe for show off "look at me I have BIG turbo" or maybe for that reoson you've mentioned, restrictive housings... I can't say. In my region all the big boost and power cars have so low CR's that for starting they need additional injectors and so on...