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I blocked about 75% of my grill. Also ran an LED light on the dash to see when the fan cut on. On an 80 degree day, cruising at 55, the fan will cut on for a minute every 4-5 minutes. That seems reasonable to me. Not too many days over 80 here in San Jose CA. Then last night (around 60 outside) it only came on near home when I EOC'd into a light and then restarted when light turned green. Fan came on for 30 seconds on engine restart.
I also took the snorkle off the air intake so I am pulling air from about a foot behind the radiator fan. When the radiator fan is running I can get air temps of 90-100. When the fan is off then the air temps are only 5 or 10 degrees above the outside temp. This data is making me think about at better belly pan/more sealing around hood/lights. I would like to get the air intake temps up a little more before we head into those "brutal" winters here in the bay.
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