Quote:
Originally Posted by Taylor95
I am more interested in the aerodynamics of the body than the tires. But it doesn't really matter. I was also wondering what those holes in the front of the SS were for. Does anyone else think that the more squarish shape of the SS has a detrimental effect on aerodynamics? I would think that the more rounded shape of the other versions of the Silverado would aid FE better.
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The big dogs say that there's no magic radius for the forebody.Once you have enough leading edge radius to achieve attached flow,there's little else to be gained with more softening.
The challenge is separated flow in the aft-body,and it's attendant pressure drag.
According to Wolf Hucho,the entire premise for streamlining is addressing this pressure drag of the aft-body.
The squarish 1st-gen,Cd 0.475, Chevy S-10/GMC Sonoma was reduced to Cd 0.315 by Gale Banks Racing.
GM's roundish Holden Ute was Cd 0.309 with it's factory tonneau cover.
The Cd 0.44 Toyota T-100 streamlining netted perhaps Cd 0.218,considering the DARKO/A2 wind tunnel discrepancy.
*cooling drag on trucks is high.Cd 0.027 on the T-100
*side mirrors on T-100 were Cd 0.023 between out and folded.
*the cab/bed gap measured Cd 0.016 on the T-100
*a belly pan with 2.8-degree diffuser could net -Cd 0.07