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Old 06-18-2013, 10:29 PM   #4 (permalink)
dwarfnebula
EcoModding Lurker
 
Join Date: Jun 2013
Location: Colorado
Posts: 12

SUV (Stupid Unnecessary Vehicle) - '94 Jeep Cherokee Country
90 day: 20.65 mpg (US)

Mack - '97 Hyundai Elantra wagon
90 day: 31.68 mpg (US)
Thanks: 1
Thanked 3 Times in 3 Posts
That thing should be running hotter than that. The thermostat is most likely not closing, it should be up at least 190 without the grille block. I suppose the blocked grille could cause the fan to run more, I would guess that the extra drag may or may not be worth more than the aero gains depending on load and climate.

It's possible that blocking off airflow through the A/C condenser could raise high side pressures and therefor make the compressor harder to turn. If it gets to that point the A/C performance will suffer and it will not blow very cold.
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