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SavageC20 · 03-08-2019, 08:40 PM

After hooking up the adjustable vacuum advance and getting it dialed in the truck seems to run about ten degrees cooler, 185 degrees, according to my VDO gauge. I am going to install the severe duty fan clutch and see if I can get it any lower. I used an infrared temp gun and at idle the thermostat housing was reading 175 degrees and the front of the block was reading 200 degrees. Not sure how accurate the temp gun is but it seems to be close.

03-08-2019, 08:40 PM	#31
SavageC20 Registered User Join Date: Sep 2018 Location: California Posts: 151	Re: How hot do Big Blocks normally run? After hooking up the adjustable vacuum advance and getting it dialed in the truck seems to run about ten degrees cooler, 185 degrees, according to my VDO gauge. I am going to install the severe duty fan clutch and see if I can get it any lower. I used an infrared temp gun and at idle the thermostat housing was reading 175 degrees and the front of the block was reading 200 degrees. Not sure how accurate the temp gun is but it seems to be close.