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  4. Messed up on my build need radiator advice

Messed up on my build need radiator advice

Scheduled Pinned Locked Moved Engine
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  • CalumC Offline
    CalumC Offline
    Calum
    wrote on last edited by Calum
    #15

    @dan28 I have ordered a new one should be here in a few days, I will measure it when it arrives for you.

    They are tiny though.

    Always Originate, Never Pirate!

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    • CalumC Calum

      @dan28 I have ordered a new one should be here in a few days, I will measure it when it arrives for you.

      They are tiny though.

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      dan28
      wrote on last edited by
      #16

      @calum thanks calum

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      • D dan28

        @calum thanks calum

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        dan28
        wrote on last edited by
        #17

        @dan28 the dtr rad is approx 33cm long an 12 wide
        I have a gas gas txt rad it's 12 cm wide an approx 20 cm long
        What are peoples thoughts on this?
        Too small?

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        • declanD Offline
          declanD Offline
          declan
          wrote on last edited by
          #18

          @dan28 I was looking at one of those on ebay,it would likely me okay if room allows adding a radiator fan would help too

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          • declanD declan

            @dan28 I was looking at one of those on ebay,it would likely me okay if room allows adding a radiator fan would help too

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            dan28
            wrote on last edited by
            #19

            @declan said in Messed up on my build need radiator advice:

            @dan28 I was looking at one of those on ebay,it would likely me okay if room allows adding a radiator fan would help too
            its alot smaller though an the fan for the gas gas rad is expensive even for a used one
            i need to find out the sizes of the ktm sx 50 rads both together they should be equalivent to the dtr rad i think

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            • D dan28

              @declan said in Messed up on my build need radiator advice:

              @dan28 I was looking at one of those on ebay,it would likely me okay if room allows adding a radiator fan would help too
              its alot smaller though an the fan for the gas gas rad is expensive even for a used one
              i need to find out the sizes of the ktm sx 50 rads both together they should be equalivent to the dtr rad i think

              S Offline
              S Offline
              SpookDog
              wrote on last edited by
              #20

              @dan28
              The manual says that the cooling works by โ€œthermo ~ syphonic action in conjunction with the pumpโ€, but basically when the coolant in the cylinder sleeve is hot enough to actuate the thermostat and open up, the pump will move it. I donโ€™t know any other motor that has the radiator physically above the motor to rely on heat rising through convection ๐Ÿ™„
              I guess Iโ€™m saying that Iโ€™d test run it with the rad mounted where you want it and see if it works. As long as the pump moves the coolant I donโ€™t see any problem ๐Ÿ˜
              I could be totally wrong though! ๐Ÿ˜œ

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              • S SpookDog

                @dan28
                The manual says that the cooling works by โ€œthermo ~ syphonic action in conjunction with the pumpโ€, but basically when the coolant in the cylinder sleeve is hot enough to actuate the thermostat and open up, the pump will move it. I donโ€™t know any other motor that has the radiator physically above the motor to rely on heat rising through convection ๐Ÿ™„
                I guess Iโ€™m saying that Iโ€™d test run it with the rad mounted where you want it and see if it works. As long as the pump moves the coolant I donโ€™t see any problem ๐Ÿ˜
                I could be totally wrong though! ๐Ÿ˜œ

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                SpookDog
                wrote on last edited by
                #21

                More importantly though: where the fuck are the pics of a Dtr engine in a chop frame!! ๐Ÿง Come on Dog!...

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                • S SpookDog

                  @dan28
                  The manual says that the cooling works by โ€œthermo ~ syphonic action in conjunction with the pumpโ€, but basically when the coolant in the cylinder sleeve is hot enough to actuate the thermostat and open up, the pump will move it. I donโ€™t know any other motor that has the radiator physically above the motor to rely on heat rising through convection ๐Ÿ™„
                  I guess Iโ€™m saying that Iโ€™d test run it with the rad mounted where you want it and see if it works. As long as the pump moves the coolant I donโ€™t see any problem ๐Ÿ˜
                  I could be totally wrong though! ๐Ÿ˜œ

                  D Offline
                  D Offline
                  dan28
                  wrote on last edited by
                  #22

                  @spookdog said in Messed up on my build need radiator advice:

                  @dan28
                  The manual says that the cooling works by โ€œthermo ~ syphonic action in conjunction with the pumpโ€, but basically when the coolant in the cylinder sleeve is hot enough to actuate the thermostat and open up, the pump will move it. I donโ€™t know any other motor that has the radiator physically above the motor to rely on heat rising through convection ๐Ÿ™„
                  I guess Iโ€™m saying that Iโ€™d test run it with the rad mounted where you want it and see if it works. As long as the pump moves the coolant I donโ€™t see any problem ๐Ÿ˜
                  I could be totally wrong though! ๐Ÿ˜œ

                  If you look at yours the water goes out the bottom rad hose along the metal pipe an to the water pump
                  The problem I have using the dtr rad the water goes out the bottom hose an then has to travel upwards to the water pump
                  A smaller radiator mounted higher up would solve the issue an the water would travel down as intended
                  I m not sure how to add photos on here

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                  • D dan28

                    @spookdog said in Messed up on my build need radiator advice:

                    @dan28
                    The manual says that the cooling works by โ€œthermo ~ syphonic action in conjunction with the pumpโ€, but basically when the coolant in the cylinder sleeve is hot enough to actuate the thermostat and open up, the pump will move it. I donโ€™t know any other motor that has the radiator physically above the motor to rely on heat rising through convection ๐Ÿ™„
                    I guess Iโ€™m saying that Iโ€™d test run it with the rad mounted where you want it and see if it works. As long as the pump moves the coolant I donโ€™t see any problem ๐Ÿ˜
                    I could be totally wrong though! ๐Ÿ˜œ

                    If you look at yours the water goes out the bottom rad hose along the metal pipe an to the water pump
                    The problem I have using the dtr rad the water goes out the bottom hose an then has to travel upwards to the water pump
                    A smaller radiator mounted higher up would solve the issue an the water would travel down as intended
                    I m not sure how to add photos on here

                    S Offline
                    S Offline
                    SpookDog
                    wrote on last edited by
                    #23

                    @dan28

                    The pump would still work and draw coolant up, it doesnโ€™t rely on the coolant โ€˜fallingโ€™ down into the pump. Itโ€™s strong enough to lift fluid 2 foot. If it looks good, try it. If not do something that you like the look of!

                    There is a tutorial on this site for posting pics, if I can suss it you can! I use a phone and imgur (app) to host mine. Do a search, please, it sounds like a wicked build!...

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                    • S SpookDog

                      @dan28

                      The pump would still work and draw coolant up, it doesnโ€™t rely on the coolant โ€˜fallingโ€™ down into the pump. Itโ€™s strong enough to lift fluid 2 foot. If it looks good, try it. If not do something that you like the look of!

                      There is a tutorial on this site for posting pics, if I can suss it you can! I use a phone and imgur (app) to host mine. Do a search, please, it sounds like a wicked build!...

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                      dan28
                      wrote on last edited by
                      #24

                      @spookdog I would rather it worked as yamaha intended so would like the radiator higher than the water pump
                      I trail fitted the gas gas radiator it will fit but as it is approx 15cm shorter then there will be less coolant compared compared to how much is in The standard radiator not sure if that's going to be an issue

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                      • declanD Offline
                        declanD Offline
                        declan
                        wrote on last edited by
                        #25

                        @dan28 I doubt the coolant volume being an issue

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                        • declanD declan

                          @dan28 I doubt the coolant volume being an issue

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                          dan28
                          wrote on last edited by
                          #26

                          @declan said in Messed up on my build need radiator advice:

                          @dan28 I doubt the coolant volume being an issue
                          Would it not be the same as using your bike with a low coolant level as this radiator is 15cm shorter so quite a bit smaller

                          S declanD 2 Replies Last reply
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                          • D dan28

                            @declan said in Messed up on my build need radiator advice:

                            @dan28 I doubt the coolant volume being an issue
                            Would it not be the same as using your bike with a low coolant level as this radiator is 15cm shorter so quite a bit smaller

                            S Offline
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                            SpookDog
                            wrote on last edited by
                            #27

                            @dan28
                            What country do you live in?

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                            • D dan28

                              @declan said in Messed up on my build need radiator advice:

                              @dan28 I doubt the coolant volume being an issue
                              Would it not be the same as using your bike with a low coolant level as this radiator is 15cm shorter so quite a bit smaller

                              declanD Offline
                              declanD Offline
                              declan
                              wrote on last edited by
                              #28

                              @dan28 no it wouldn't since the radiator will be filled to the top regardless so there's no air to expand

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                              • S SpookDog

                                @dan28
                                What country do you live in?

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                                dan28
                                wrote on last edited by
                                #29

                                @spookdog said in Messed up on my build need radiator advice:

                                @dan28
                                What country do you live in?
                                I m in the UK boss

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                                • D dan28

                                  @spookdog said in Messed up on my build need radiator advice:

                                  @dan28
                                  What country do you live in?
                                  I m in the UK boss

                                  S Offline
                                  S Offline
                                  SpookDog
                                  wrote on last edited by
                                  #30

                                  @dan28
                                  My temp gauge barely goes up a CM, only time it went up halfway was when the head gasket blew on the hot day (2 days ago). I could run a 15cm smaller radiator on my bike without heat issues.
                                  Put a 12v fan on it with a temp probe to the radiator and itโ€™d be fine, IMO...

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                                  • S SpookDog

                                    @dan28
                                    My temp gauge barely goes up a CM, only time it went up halfway was when the head gasket blew on the hot day (2 days ago). I could run a 15cm smaller radiator on my bike without heat issues.
                                    Put a 12v fan on it with a temp probe to the radiator and itโ€™d be fine, IMO...

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                                    dan28
                                    wrote on last edited by
                                    #31

                                    @spookdog after measuring the finned part of the gas gas radiator is only 15cm its literally half the size of the original
                                    I remember callum saying he had issues with his bike running hot an he used the standard radiator
                                    I would rather use a radiator closer to the intended size

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                                    • CalumC Offline
                                      CalumC Offline
                                      Calum
                                      wrote on last edited by
                                      #32

                                      @dan28 according to the vapor unit, it was sitting at 100 celcius in traffic. Which seems way too hot.

                                      Always Originate, Never Pirate!

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                                      • CalumC Calum

                                        @dan28 according to the vapor unit, it was sitting at 100 celcius in traffic. Which seems way too hot.

                                        S Offline
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                                        SpookDog
                                        wrote on last edited by
                                        #33

                                        @calum
                                        I always thought ideal temp was as close to 100 as possible? Thatโ€™s why the radiator cap is pressurised, to stop the coolant boiling but get it up there? I might be wrong, itโ€™s been a long time since I looked into it and it was a car...

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                                        • declanD Offline
                                          declanD Offline
                                          declan
                                          wrote on last edited by declan
                                          #34

                                          @spookdog not sure on my temp gauge when offroading in summer I would consider 110 Celsius to be time for cooling down since the motor would be smelling very hot

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