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Custom Dodge Ram Performance Mods - Engine - 5.7 HEMI V8 Discuss modifying your Dodge Ram with Performance Parts and Accessories!
Factory Spec: 5.7-liter HEMI® V8 engine - 390 horsepower, 407 lb-ft of torque.


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  #1  
Old 03-14-2010, 05:30 PM
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Default Diablo Sport! Question!

What is a good temp to set the cooling fans on the 09 hemi engines...I installed my predator and set the cooling fans to come on a 185, But now It seems like they never turn off...What is a good temp to set the fans at? Anyone else with the Predator tuner, what temp are you running your fans at?

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Old 03-14-2010, 08:03 PM
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Did you change out the thermostat also ? I know my SRT8 car has a 203 degree thermostat in it from the factory .
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Old 03-14-2010, 08:11 PM
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If you set the fans lower than the t-stat they will never shut off. The fan will continue to run and try and cool the coolant and the t-stat will stay closed until the coolant is up to temp.

Someone correct me if I am wrong but I think the OE t-stat is 195 degrees.
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Old 03-14-2010, 09:06 PM
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I would have to agree if you set the fans lower then your going to have em on all the time
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Old 03-14-2010, 10:04 PM
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I set the low speed fan, all conditions (AC On, AC Off, etc...) at 191 and the high speed fan, again all conditions, at 198 on my SRT8.

They run a bit more than they used to but not all the time.

You may have to play around with it a bit as I did when setting mine. I wasn't sure just where the engine normally ran with the 180 degree TStat in it so there was some setting and driving, then resetting and driving again until I got it where I wanted it.
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