It is helpful to look at what FIAT did to the ND front end to get sufficient airflow/cooling of little 1.4 liter turbo motor in this same ND chassis. Upper half of ND Grille is blocked, not real, only bottom half is open. In contrast, Fiat has two functional grilles instead of one, each one is about equal to the single grille opening of the ND. And note how Fiat did extensive baffles that direct and compress all that air through the coolers. The taller Fiat nose allows lower grille to be dedicated to the Intercooler....and upper grille that is again as big as single air inlet on ND and yet dedicated to Radiator cooling. Fiat's taller and more blunt nose, a redesign of the ND front end, results in efficient turbo motor cooling, efficient dedicated intercooler cooling, all quite impressive....and as boosted ND drivers we are a little jealous!
More and more convinced that FAST BOOSTED ND track guys will need grille chop...or our new Carbon Miata grille upgrade to get enough air.... to go faster than the fastest normally aspirated ND guys....or you need a monster size oil cooler with turbo. To explain that another way, if you cruise the track with laps no faster than then best normally aspirated track ND drivers then you won't need a lot more cooling, our upgraded radiators and perhaps a Mishimoto oil cooler likely enough for you. But if you are able to use the power with sufficient suspension and brakes to go significantly faster than the best normally aspirated ND drivers then you are going to make the sort of heat load that really needs more air and significantly more cooling than Mazda planned with their minimalist ND grille opening. By the way....Fiat 124 comes with radiator that is at least twice as thick as ND radiator and has heat exchanger to dump oil heat into the coolant.