There are ways to mitigate excessive heat in the engine compartment like an insulating header wrap in which you wrap your exhaust manifold and/or header in woven refractory.
http://www.heatshieldproducts.com/lava_wrap.php
Ditto on the battery, warm is better.
You could install some flaps/vents in the belly pan to allow some convection with only a small loss in aero. I have left a small opening in my grille block to allow some cool air in.
The best would be to monitor the temp. and mitigate if necessary. Next question is how hot is too hot? I'd like to know this too.
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Vortex generators are old tech. My new and improved vortex alternators are unstoppable.
"It’s easy to explain how rockets work but explaining the aerodynamics of a wing takes a rocket scientist.
