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PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

Best Fan Settings

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Old Mar 10, 2007 | 02:18 AM
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Default Best Fan Settings
What settings do you guys recommend for fan turn on and turn off? What temps should they come on at and go off at?
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Old Mar 10, 2007 | 02:46 AM
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mine are set at 190 and I have a 180 stat. most guys run 160 stats I think though.
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Old Mar 10, 2007 | 09:44 AM
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what thermostat do you have?
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Old Mar 10, 2007 | 09:52 AM
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more importantly, go for a drive and see what range of temps your car operates in. Set the fans to come on on the higher end of the temps (IE: while sitting at a stop light)
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Old Mar 11, 2007 | 09:05 PM
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With the stock thermostat, I use fan settings very similar to these.
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Old Mar 11, 2007 | 10:21 PM
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I run the hypertech numbers, since they make the thermostats. They are kind enough to print them in thier instruction manuals.

Ryan
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Old Mar 22, 2007 | 04:51 AM
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"on" should be 6-10 degrees above the "off"

mines 195 on 185 off

and 185 on 175 off
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Old Mar 22, 2007 | 08:47 AM
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I have a 160 stat. I took the stock settings and dropped them 30*F or 35*F (I can't remember which - most likely 35) for the on/off settings.
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Old Mar 22, 2007 | 09:01 PM
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ditto with sobbaka79.
if you have a stock stat id say,leave em alone.you would just be fighting the fan and the thermostat. if your running a 160 ,i run mine quite close to sobbaka79 s.
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Old Mar 22, 2007 | 09:11 PM
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Originally Posted by sobaka79
"on" should be 6-10 degrees above the "off"

mines 195 on 185 off

and 185 on 175 off
Shouldn't there be at least a one degree difference between on/off between low and high? What does the PCM do when it sees 185?
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Old Mar 22, 2007 | 11:53 PM
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Originally Posted by 2001NBMZ28
Shouldn't there be at least a one degree difference between on/off between low and high? What does the PCM do when it sees 185?
It turns the low speed off and the highspeed on.
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Old Mar 23, 2007 | 08:31 AM
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Originally Posted by sobaka79
"on" should be 6-10 degrees above the "off"

mines 195 on 185 off

and 185 on 175 off
Originally Posted by 2001NBMZ28
Shouldn't there be at least a one degree difference between on/off between low and high? What does the PCM do when it sees 185?
I think you're looking at it backwards.

When temps hit 185, the low fan comes on. If they keep climbing with the low fan on, the high fan will come on at 195 (both fans will be running).

When temps fall, the high fan will turn off at 185 (leaving just the low fan running). If they fall below 175, the low fan will shut off.

Make sense?
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Old Mar 23, 2007 | 09:15 AM
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i think mine are like 170 and 180 on my 160 stat.
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Old Mar 23, 2007 | 09:52 AM
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what are the stock fan settings
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Old Mar 23, 2007 | 10:07 AM
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Stock -
Low Fan on/off - 226.41*F / 219.17*F
High Fan on/off - 233.59*F / 227.33*F
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Old Mar 23, 2007 | 10:35 AM
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Originally Posted by slow
I run the hypertech numbers, since they make the thermostats. They are kind enough to print them in thier instruction manuals.

Ryan
Actually MotoRad makes the T-stats. Here is what Hypertech recommens. I included the C conversions for the TC users.

________195
________ON______OFF
F1______209F____200F
________98.3C___93.3C
F2______219F____210F
________103.9C__98.9C

________180
________ON______OFF
F1______194F____185F
________90C_____85C
F2______204F____195F
________95.6C___90.6C

________160
________ON______OFF
F1______184F____175F
________84.4C___79.4C
F2______194F____185F
________90C_____85C
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Old Mar 23, 2007 | 12:41 PM
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thanks for the info.



Ryan
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