Quote:
Originally Posted by serialk11r
So by my calculation, just underbody panels would give me less than 1 mpg, so that's clearly not worth it on an already fuel efficient car, since the OEM ones run 300 bucks.
Could underbody panels + diffuser be much more effective though? The diffuser would just be maybe 50 bucks in sheet metal and bolts plus 1 or 2 hours time for drilling and bending stuff, and if that could drop another 0.01 Cd, then the overall cost could be worth it.
I probably will take the car to the track sometime but in the Bay Area there's basically only Sonoma Raceway which is pretty far, so this is going to be 99.5% daily driver.
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On a deep,ladder-type chassis,body-on-frame type vehicle a full belly pan and diffuser would be good for a little over 15% drag reduction.
On contemporary cars however,the automakers have been optimizing the underbodies since the 1970s.
With the BRZ,it's hard to actually predict what a 'clean' belly would do.
If,in the future,you decided to add some rear length,a good belly would make all that work to its full potential.