Spal brushless fan?

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    Spal brushless fan?

    Anyone using or used a Spal brushless fan? Thoughts? TIA

    https://www.kartek.com/parts/spal-30...uller-fan.html

    #2
    Just a FYI, this model has a 3.20" height (info from Spal tech line)

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      #3
      I just got a new C&R radiator (last week) that has 2 of the new Spal brushless fans on it. Mine run off PWM from the LS computer.


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      I'll report back when they actually spin under their own power. Hopefully, being sealed they live a long and happy life....................and move a ton of air.
      Kevin

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        #4
        How are you planning to wire it, only using PNW signal from LS or using the 2 Spal harnesses and Spal temp sensor?

        https://www.kartek.com/parts/spal-sb...l-ts-harn.html
        https://www.kartek.com/parts/spal-sb...ur-sensor.html
        https://www.kartek.com/parts/spal-38...f-195f-on.html

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          #5
          Originally posted by Chief Rocka View Post
          How are you planning to wire it, only using PNW signal from LS or using the 2 Spal harnesses and Spal temp sensor?
          PWM signal from the LS E38 ECU is the plan. I have a Gen4 LS3. I've also read where folks have had issues getting the PWM signals correct to play nice.
          Kevin

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            #6
            I started a cooling tech thread with some info on the Spals
            https://irate4x4.com/forum/general-t...oling-fan-tech

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              #7
              Slight hiccup but I got it installed with a 05 E40 ecm set to PWM electric and 128hz. At 1st it was running really slow at commanded 100% and allowed the engine to get hot. Found a hptuner post that said non-oem fans use inverse or reverse logic. 8% is full speed. Re-wrote tune and this thing blows !



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                #8
                Awesome info right there. Thanks for posting the follow up. I couldn't remember where I read that there were issues,
                Kevin

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                  #9
                  FYI for long term you should run the fans much more variable than what you have set. When you have that much control absolutely no reason to have the fans at full speed until things are REAL hot, like 230 range. Your alternator will thank you.


                  Originally posted by Chief Rocka View Post
                  Slight hiccup but I got it installed with a 05 E40 ecm set to PWM electric and 128hz. At 1st it was running really slow at commanded 100% and allowed the engine to get hot. Found a hptuner post that said non-oem fans use inverse or reverse logic. 8% is full speed. Re-wrote tune and this thing blows !



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                    #10
                    With this inverse logic aftermarket fan, 95-15 is the range. With 15 being the minimum and =25% actual fan speed. I spoke to Spal and they said 100-X=fan speed, where X is setting in tune (ie 100-5= 95% fan, 100-85=15min or 25% fan).

                    What do you suggest? In stock application when it's getting hammered, speed is probably 100+MPH. In the woods when it's getting hammered, speed is more like 10 mph... Sometimes much slower like when climbing. At what temp should a 05 alum LS2 operate, for our applications?

                    Thanks for the input.

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                      #11
                      Just off the cuff with a dual 12 setup I would think you will need the fans in the 25-30% speed range to keep temp at idle. LS engines are what 200-205 min operating temp? So think 70# around that temp and have the speed increase to like 20# around the temp you feel comfortable running in the 220-230 range then above that go full speed. Fans should likely never go full speed.

                      Remember this is different than on/off fan control you will still have cooling there vs not until the fan reaches the on point. You want the thermostat to stay open and control your temp with the fans. You may need to tweak it in on a medium hot day to get it based where you want.

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