Stock T-Stat Fan Settings
Thread Starter
Staging Lane
Joined: Feb 2005
Posts: 70
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From: Plainfield, IL
Stock T-Stat Fan Settings I have a stock t-stat and I would like to reprogram my fans. I searched but couldn't find a clear answer to my question. How does F1 196/188 and F2 198/190 sound? TIA
TECH Enthusiast
Joined: Sep 2004
Posts: 564
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From: Omaha, NE
I do not recall what the stock thermostat rating is but it is important to keep your fan off times a couple of degrees above it. Example, if you have a 195 deg thermostat, F1 could be 204/197 and F2 206/198. If you do not keep your fan off temp above the thermostat your fan(s) will run continuously. Also, bi-metal thermostats are not a precision sensor, especially as they age, so keep your off temps further away from old ones.
Originally Posted by Blacker
My stock thermostat was 195* and was verified with water.
Odd. its hit or miss. What region of the country was the car purchased? I wonder if it has anything to do with california and east coast emissions standards.
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Originally Posted by Bones SS
To be safe, I'll assume I have a 195 and use the settings Dynocar suggested until I can verify the actual temp. So does F1 204/197 and F2 206/198 sound good?
Do your have hpt or efi live? Either activate both your fans at idle or cruise down the freeway and see what temp your reading. Usually it'll be about 8 to 15* hotter than the actual Tstat. Set the fans accordingly.
For ex. if your cruising down the freeway in 50* weather and your current temp is 170* set the low fans to come on at 175* ect.
Thread Starter
Staging Lane
Joined: Feb 2005
Posts: 70
Likes: 0
From: Plainfield, IL
Originally Posted by SmokingWS6
Do your have hpt or efi live? Either activate both your fans at idle or cruise down the freeway and see what temp your reading. Usually it'll be about 8 to 15* hotter than the actual Tstat. Set the fans accordingly.
For ex. if your cruising down the freeway in 50* weather and your current temp is 170* set the low fans to come on at 175* ect.
For ex. if your cruising down the freeway in 50* weather and your current temp is 170* set the low fans to come on at 175* ect.
Originally Posted by SmokingWS6
Do your have hpt or efi live? Either activate both your fans at idle or cruise down the freeway and see what temp your reading. Usually it'll be about 8 to 15* hotter than the actual Tstat. Set the fans accordingly.
For ex. if your cruising down the freeway in 50* weather and your current temp is 170* set the low fans to come on at 175* ect.
For ex. if your cruising down the freeway in 50* weather and your current temp is 170* set the low fans to come on at 175* ect.
TECH Enthusiast
Joined: Sep 2004
Posts: 564
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From: Omaha, NE
We are tuning a twin turbo 01 Vette right now and it must have a 195 deg thermostat, here is why I say that. When I set the F1 and F2 to turn off at less then 194, the fans turned on but never turned off and the coolant temp would not go below 194. So I turned each fan off slightly above 195, and they work fine now, seen this many times. These 195+ thermostats are for emissions purposes.