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Jeep Street and Performance Do you like to go fast in your Jeep?

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  #1  
Old October 30th, 2015, 14:49
fzsk4p fzsk4p is offline
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ECM controlled E. Fans Temp Set Points

Sent Chris Jensen a couple XJ ECM`s to recal for my Stroker YJ.

Been running a mechanical fan but MIGHT convert to a Ford Contour electric.

What are the XJ aux. fan temp set points that are cal-ed in the factory XJ ECM ?

Thinking on at 205 and off at 195 ? Chris can cal anything I want.

Thanks
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Old October 30th, 2015, 15:48
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ehall ehall is offline
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Re: ECM controlled E. Fans Temp Set Points

Normal temp is 210. The condenser fan is set to come on around 220 (+/- 5) depending on the year and features (some are more tightly integrated into AC than others). My efan setup uses a switch that turns the fan on at 95c (203f) and then off again at 90c (194f). That is hotter than the thermostat, so the idea is that coolant gets hot enough to open the thermostat all the way the fan will come on, if it gets any hotter the condenser fan will kick on to support it, then when coolant from the radiator drops the engine temp enough for thermostat to close the fans turn off.
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Last edited by ehall; October 30th, 2015 at 15:52.
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Old October 30th, 2015, 16:04
fzsk4p fzsk4p is offline
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Re: ECM controlled E. Fans Temp Set Points

Quote:
Originally Posted by ehall View Post
My efan setup uses a switch that turns the fan on at 95c (203f) and then off again at 90c (194f). That is hotter than the thermostat, so the idea is that coolant gets hot enough to open the thermostat all the way the fan will come on, if it gets any hotter the condenser fan will kick on to support it, then when coolant from the radiator drops the engine temp enough for thermostat to close the fans turn off.
This is the logic I am thinking also. Don`t want to be running at 195 as the fan will never shut off during normal operation.

Best numbers on the dyno are hot lapping at around 210. So I am not afraid of a little heat so long as the fan can take it down when requested.
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Old October 30th, 2015, 16:32
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ehall ehall is offline
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Re: ECM controlled E. Fans Temp Set Points

This is my setup http://www.naxja.org/forum/showthread.php?t=1035194
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Old October 30th, 2015, 16:54
fzsk4p fzsk4p is offline
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Re: ECM controlled E. Fans Temp Set Points

Perfect, suspect the fan combo you are using is in the 3.8 dual unit that will fit the YJ radiator nicely. Can use the ECM to trigger the relay. Have to decide if a single speed will suffice or wire it up for the dual low/high.

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