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Old 06-03-2013, 09:07 PM   #8 (permalink)
redpoint5
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Join Date: Aug 2010
Location: Oregon
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Acura TSX - '06 Acura TSX
90 day: 28.24 mpg (US)

Lafawnda - '01 Honda CBR600 F4i
90 day: 47.32 mpg (US)

Big Yeller - '98 Dodge Ram 2500 base
90 day: 21.82 mpg (US)

Prius Plug-in - '12 Toyota Prius Plug-in
90 day: 57.64 mpg (US)

Mazda CX-5 - '17 Mazda CX-5 Touring
90 day: 24.55 mpg (US)

Chevy ZR-2 - '03 Chevrolet S10 ZR2
90 day: 17.14 mpg (US)
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My T-stat is fully open at 190 in my TSX, and the fan kicks in at 213. I initially did a full grill block during the winter and had no issues with trips of 30min or less, but driving an hour on the freeway had the fans cycling on every minute. Since then I have opened it up 25%.

I'm curious if blocking could cause other problems due to under-hood temperatures rising. Has anyone done a before and after comparison of under-hood temps? I'd hate to loose a PS pump, AC compressor, or some engine management computer due to a grill block. There are electronic ballasts for my headlights in the engine compartment and I'm concerned about the heat there as well.

On top of all this, the AC radiator relies on airflow from the grill for cooling. I'm wondering if the cabin cooling efficiency can drop too low even if the engine radiator is getting sufficient airflow?
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