If this was the real reason then every track race car would have a roof scoop as well.
Point of roof scoop.
Scoop measures approx 19 x 17 and 3 5 tall.
But if you re just after that snappy rally car look install the scoop by itself without cutting a hole in the roof.
It is attached directly to the decking along the bottom of the roof slope and above the underlay on the sides of the roof.
The main reason for having a roof scoop on a rally car is to actually pressurise the interior of the car slightly.
I understand how hood scoops work but it kinda defeats the purpose if someone mounts it on the roof the piping is to long from the roof to the engine to make any power gains.
Due to its location the air enters clean with no dust and it contributes to keeping the temperature down as well as to keep positive pressure inside the cockpit preventing dust from entering by other car openings.
The idea of roof vents existed for hundreds of years with natural vents employed in chinese buildings during the tang dynasty natural ventilation ducts in the buddhist monks caves and wind catchers incorporated in arabian architecture.
Vent roofs with steeples towers or cupolas can be found in different buildings from barns to cathedrals.
It doesn t even look good.
Roof vents these enclosed structures made of metal or plastic feature openings and fins ensuring that the attic space is properly ventilated.
A roof scoop consists of a small opening at the front of the roof designed to allow some fresh air to enter inside the car.
The building codes and building science for.
Yes the roof scoop will give some air flow in the cabin however there are far more efficient and aerodynamic ways of doing so.
Why would someone put it on the roof instead of the hood.
The contractor shall verify nailing spacing of roof sheathing or strapping and shall report deficiencies to site manager.