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Aerodynamically it will make a difference.
Measuring the difference might be hard in EV. Especially this time of year.
Why else did GM go through the hassle of giving the Cruze Eco moveable front cowl flaps to close off that big opening?
I plan on using hardware store hot water pipe foam insulation.
It's cheap and quickly removable.
Why not close up the nose of the car when it's cold and you are only in EV. The gaps around that silly shiny grill will still be passing lots of air.
I'll monitor all coolant temps with the Torque app on a tablet to be sure.
Of course placing your hand on the APM after a trip in EV will tell if the liquid cooling system is doing its job.
Modern ICE have excellent cooling systems these days. When's the last time you heard of a modern car overheating while idling in Phoenix or climbing the mountains out of that hellhole?
 
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