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secondchance · 07-19-2011

Thanks, Tom. Looking at the housing I figured the 3rd bolt wouldn't be a major issue although I will correct it.

Well, driving back home yesterday it was 95-97 degrees here. Some 60 plus mph and rush hour crawl. Despite 97 ambient temp at 50 plus mph coolant temp stayed at around 200 (about 13 degrees lower than before). 15-20 minutes of crawling in the traffic Z mainteained 218-220 with AC on. Eventually by the the time I got home she was at 227 w/ 216 oil temp. Before I would have gone past 230 and would have had to turn the AC off to drop the temp. So, thermostat change most definately helped. However, I am not sure drilling holes helped even further or not.

Bottom line, it seems, at ambient temp of 90 plus w/ AC on, heat produced is higher than the amount of heat that can be rejected not so much due to radiator but rather insufficient air flow. That being the case, I wonder replacing at least one of factory fans w/ an after market higher flow fan would put an end to this fear of over heating once and for all. Factory fans look to be 16" dia. (did not measure it yet). Anyone know what CFM factory fans are rated at? Looking at Summit catalog 16" are available between 2100 to 3600 CFM. It couldn't be that hard to rig same diameter fan to factory harness and typically engineers build in extra amp to the circuits - just a thought.

07-19-2011	#2
secondchance Join Date: Aug 2006 Location: McLean, VA Posts: 3,736	Re: Thermostat question Thanks, Tom. Looking at the housing I figured the 3rd bolt wouldn't be a major issue although I will correct it. Well, driving back home yesterday it was 95-97 degrees here. Some 60 plus mph and rush hour crawl. Despite 97 ambient temp at 50 plus mph coolant temp stayed at around 200 (about 13 degrees lower than before). 15-20 minutes of crawling in the traffic Z mainteained 218-220 with AC on. Eventually by the the time I got home she was at 227 w/ 216 oil temp. Before I would have gone past 230 and would have had to turn the AC off to drop the temp. So, thermostat change most definately helped. However, I am not sure drilling holes helped even further or not. Bottom line, it seems, at ambient temp of 90 plus w/ AC on, heat produced is higher than the amount of heat that can be rejected not so much due to radiator but rather insufficient air flow. That being the case, I wonder replacing at least one of factory fans w/ an after market higher flow fan would put an end to this fear of over heating once and for all. Factory fans look to be 16" dia. (did not measure it yet). Anyone know what CFM factory fans are rated at? Looking at Summit catalog 16" are available between 2100 to 3600 CFM. It couldn't be that hard to rig same diameter fan to factory harness and typically engineers build in extra amp to the circuits - just a thought.