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    Understeer.com Fan Delete Kit

    Will the fan delete kit on understeer.com work for an e30 M42?

    Originally posted by Gruelius
    and i do not know what bugg brakes are.

    #2
    I would like to know this as well :)

    Comment


      #3
      all that is is an E36 M42 temp switch, an 80C t-stat and a couple bottles of water wetter + their cap thingy (which is bling-bling I guess but uneccesary). But assuming the 92+ 318 thermostat works in your car everything else is the same.
      Build thread

      Bimmerlabs

      Comment


        #4
        shouldnt you use a 75C thermostat? if your fan comes on at the same temp as your thermometer opens, then it will be on every time.
        90 E30 325i

        Comment


          #5
          Originally posted by guibo09 View Post
          shouldnt you use a 75C thermostat? if your fan comes on at the same temp as your thermometer opens, then it will be on every time.
          this may seem obvious, but the thermoswitch is in the radiator, the thermostat in your engine. The two can have very different temps, usually the radiator is much cooler.

          it isn't neccesarily better to run a cooler t-stat either. You can actually overheat faster with a cooler t-stat than a hotter one.
          Build thread

          Bimmerlabs

          Comment


            #6
            Originally posted by nando View Post
            this may seem obvious, but the thermoswitch is in the radiator, the thermostat in your engine. The two can have very different temps, usually the radiator is much cooler.

            it isn't neccesarily better to run a cooler t-stat either. You can actually overheat faster with a cooler t-stat than a hotter one.

            i think i get what your saying. since we dont have much choise for the thermoswitch temperature, what thermostat temp do you recommend with a 80C thermoswitch?

            i think you also mentioned that shorting the thermoswitch to run full speed at the lower temp trigger was recommended.
            90 E30 325i

            Comment


              #7
              Originally posted by guibo09 View Post
              i think i get what your saying. since we dont have much choise for the thermoswitch temperature, what thermostat temp do you recommend with a 80C thermoswitch?

              i think you also mentioned that shorting the thermoswitch to run full speed at the lower temp trigger was recommended.
              80c is fine for most climates.

              yeah, all you really need to do is connect both ground pins on the thermoswitch to the ground on the high speed circuit. then it will always come on at high speed.
              Build thread

              Bimmerlabs

              Comment


                #8
                75c is way too cold and even 80c is too cold for the M42 everything else is designed to run at 88c. At 75c there will be all manner of problems (cylinder rinsing, sludge the list goes on).

                There is no really good "off the shelf" work around for the fan, gotta make it your self.
                I'm Not Right in the Head | Random Rants and other Nonsense1st Order Logic Failure: Association fallacy, this type of fallacy can be expressed as (∃xS : φ(x)) → (∀xS : φ(x)), meaning "if there exists any x in the set S so that a property φ is true for x, then for all x in S the property φ must be true".

                Comment


                  #9
                  I run the thermoswitch from a 318ti; dunno if it is different from other e36s or not. My thermostat is 88c. I have both speeds hooked up; I don't really want it on high speed when I'm just using the AC and such, and Indy doesn't get that hot. High speed also puts a huge strain on the alternator compared to low speed, which just saps horsepower more than anything else.

                  Project M42 Turbo

                  Comment


                    #10
                    So I should stick with the 88 instead of using the 80?

                    Why do most places recommend the 80 degree one for M42s and M5X engines?
                    Originally posted by Gruelius
                    and i do not know what bugg brakes are.

                    Comment


                      #11
                      Originally posted by kencopperwheat View Post
                      So I should stick with the 88 instead of using the 80?

                      Why do most places recommend the 80 degree one for M42s and M5X engines?
                      I would stick to 88c, like I said everything in the system is engineered to operate at that temp.

                      BMW engineers are a little crazy but I generally don't try to out think them on most issues (this being one of them).
                      I'm Not Right in the Head | Random Rants and other Nonsense1st Order Logic Failure: Association fallacy, this type of fallacy can be expressed as (∃xS : φ(x)) → (∀xS : φ(x)), meaning "if there exists any x in the set S so that a property φ is true for x, then for all x in S the property φ must be true".

                      Comment


                        #12
                        I installed the lower temp thermoswitch a week ago and added a bottle of water wetter.

                        I haven't had a hint of overheating even with extended periods of idling. We'll see how it goes once the weather gets into the 80s regularly.
                        Originally posted by Gruelius
                        and i do not know what bugg brakes are.

                        Comment


                          #13
                          Originally posted by kencopperwheat View Post
                          I installed the lower temp thermoswitch a week ago and added a bottle of water wetter.

                          I haven't had a hint of overheating even with extended periods of idling. We'll see how it goes once the weather gets into the 80s regularly.
                          For some reason I can't get my high speed fan to stay on...can't figure it out because the bentley is for 325i!
                          IG: deniso_nsi Leave me feedback here

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