NASCAR Pavement Modified Ground Effects
NASCAR Pavement Modified Ground Effects
(OP)
I run a NASCAR Wehlen-type pavement modified on road corses such as Watkin Glen, Lime Rock, etc. I am considering putting a full belly pan on it and was wondering 2 things:
1.) Should it be totally smooth or have downward facing louvers to draw air out of the engine compartment forced in through the radiator opening as well as accelerate the air going under?
2.) Will a "NACA" style duct function "backwards"? I mean, if installed with the "wide opening end 1st" leading the narrow opening end, will it draw air OUT of the inside space vs. push air in as normally used? I would like to use something like this to "evacuate/bleed" air out of the trapped ares (wheelwells, etc.)
Thanks in advance for any help...
1.) Should it be totally smooth or have downward facing louvers to draw air out of the engine compartment forced in through the radiator opening as well as accelerate the air going under?
2.) Will a "NACA" style duct function "backwards"? I mean, if installed with the "wide opening end 1st" leading the narrow opening end, will it draw air OUT of the inside space vs. push air in as normally used? I would like to use something like this to "evacuate/bleed" air out of the trapped ares (wheelwells, etc.)
Thanks in advance for any help...





RE: NASCAR Pavement Modified Ground Effects
2. I think a NACA duct works by tripping the boundary layer at its leading edge and rolling it into a vortex, rather two vortices, that stay tucked inside the bodyshell. It has to work very differently going backwards.
Mike Halloran
Pembroke Pines, FL, USA
RE: NASCAR Pavement Modified Ground Effects
RE: NASCAR Pavement Modified Ground Effects
RE: NASCAR Pavement Modified Ground Effects
David
RE: NASCAR Pavement Modified Ground Effects