Quote:
Originally Posted by aerohead
Steve,I've had a chance to look under both a Cobalt LS and SS.My impression is that neither of the cars bumper bottoms are low enough to be affected by underbody flow.The LS was so high as to clearly expose under-chassis components.The SS was lower and has an faux-aspirated panel on its underside,however,it is also so high,with respect to the cars platform bottom so as not to be swept by "clean" air.----------- Both of these models could benefit from lowering,by use of a flt-bottomed valence,which would intersect an imaginary line rising from ahead of the rear axle at the platform bottom along a 2.5-degree angle gaining elevation to the rear.Paneling in that span would provide a nice diffuser as well as a rocker panel extension to clean up turbulence behind the rear wheels/tires.
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So, basically, a panel that would extend from the from the rear axle gently upward? Wouldn't such a panel end in the middle of nowhere? (i don't think it would come up to be anywhere near the back bumper... Could I end such a panel abruptly before i got as far back as the bumper and still get gains? I really don't want to do a full boat tail. Thanks for you time. I appreciate you taking a look for me.