3650 v 3674 ?

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  • rol243
    Fast Electric Addict!
    • Apr 2017
    • 1038

    #1

    3650 v 3674 ?

    is there much power difference between a 3650 - 2200 kv motor and a 3674 - 2200 kv motor ?
  • Old School
    Senior Member
    • Aug 2017
    • 686

    #2
    If one refers the spec sheets for both motors using Leopard Hobby as an example

    3650 50 amp 26 volt 2290kv 1300 watts
    46 amp 28 volt 2090kv 1300 watts

    3674 90 amp 27 volt 2200kv 2400 watts

    On paper they would appear to be very different motors. In practice....?

    Comment

    • HTVboats
      Senior Member
      • Jun 2011
      • 803

      #3
      Easy math 1300 watts vs. 2400 watts near twice the power.
      Mic

      Mic Halbrehder
      IMPBA 8656
      NAMBA 1414

      Comment

      • rol243
        Fast Electric Addict!
        • Apr 2017
        • 1038

        #4
        thanks. so that goes to show even though the can diameters are both the same as to the kv,s , it must be the longer can length that gives more power. there was mention some time ago that all the extra can length does it supply abit more motor torque.

        Comment

        • rol243
          Fast Electric Addict!
          • Apr 2017
          • 1038

          #5
          how would a 3650 - 2350 kv be against a 3674 - 2200 kv motor both running on 4s ? in a light rigger. i am looking at these other options now as i was going to buy a 1515 - 2200 kv castle motor but i can,t buy the cooling jacket as there out of stock so looks like a smooth can now.

          Comment

          • Tamelesstgr
            Fast Electric Addict!
            • Jun 2014
            • 1516

            #6
            The 3674 will also have an easier time spinning more aggressive props due to the increased torque. It's not to say that 3650 motors can't be used in riggers, but you will be limited on size of the rigger, prop selection etc.
            NEVER SATISFIED RACING
            Fine Design 32 V-Hull 4082+6s

            Comment

            • 785boats
              Wet Track Racing
              • Nov 2008
              • 3169

              #7
              Originally posted by rol243
              how would a 3650 - 2350 kv be against a 3674 - 2200 kv motor both running on 4s ? in a light rigger. i am looking at these other options now as i was going to buy a 1515 - 2200 kv castle motor but i can,t buy the cooling jacket as there out of stock so looks like a smooth can now.
              You can buy direct from HRC Roland.
              See the danger. THEN DO IT ANYWAY!!!
              http://forums.offshoreelectrics.com/...hp?albumid=319
              http://forums.offshoreelectrics.com/...hp?albumid=320

              Comment

              • rol243
                Fast Electric Addict!
                • Apr 2017
                • 1038

                #8
                Thanks Paul, by the looks it does appear that i will be spending the rest of my life trying to get these hulls ready. its all such a big change for me going from glow to electric and as you know i do know bugger all about electrics. HELP. HEY Paul have you tried a t.p. 3650 - 2350 kv motor in a rigger on 4s ?

                Comment

                • 785boats
                  Wet Track Racing
                  • Nov 2008
                  • 3169

                  #9
                  No.
                  The Keps 21 rigger only has a TP 3640 2430kv motor in it. The ML Boatworks hull has a 4050 2390kv motor.
                  See the danger. THEN DO IT ANYWAY!!!
                  http://forums.offshoreelectrics.com/...hp?albumid=319
                  http://forums.offshoreelectrics.com/...hp?albumid=320

                  Comment

                  • Hydrocarbon82
                    Member
                    • Apr 2016
                    • 86

                    #10
                    Originally posted by Old School
                    On paper they would appear to be very different motors. In practice....?
                    In practice one can provide 1300 watts of power, the other 2400 watts of power. That means you could produce up to twice the thrust. The actual magnets are almost twice as long in the 3674, since there's at least 10mm of dead space on each end of the can.

                    If you use the correct prop for either motor, the higher wattage motor will go faster.

                    Comment

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