Rotax Operating Temp

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    • April 19, 2017 at 2:26 pm #80749
      Allen Dolph
      Participant

      Lately, I’ve been running in temperatures around 70f and only seeing a max engine temperature of around 125f after a 15min session.  I have the radiator “flap” down the whole time.  Should I tape up some of radiator to get the engine temps up around 150f?  Will this increase the engine power output?

      Thanks,

      Allen

    • April 19, 2017 at 4:40 pm #80752
      tony zambos
      Participant

      Yes. Warm your engine up on the stand before hitting the track. Are you running straight water?

      LAD Specialties customer / tony kart / rotax / kt100

    • April 19, 2017 at 7:13 pm #80758
      tony zambos
      Participant

      Wondering if something is amiss with your engine if your gauge is functioning properly.  Assuming that you are running on a sprint track.  What was the ambient temperature and what was your max RPMs?  What plug are your running and how long has it been since the engine was serviced.  What did you have as a main jet and is this an EVO motor.

      Road racing, we’d start off with a third of the radiator taped off and later with the flap down for a lap or two.  After that, it was tape off or flap open.  It’s as if your engine was not working hard enough, the plug was too cold or the carb was too rich.  Do you have the thermostat still in the head?

       

       

      LAD Specialties customer / tony kart / rotax / kt100

    • April 21, 2017 at 8:36 pm #80831
      Roman
      Participant

      You can put one or multiple pieces of tape to get the temps up.

      Aim to run it at 130-140F. Once it gets to 150F or above, there will be noticeable loss of power on the bottom end.

    • April 25, 2017 at 4:53 pm #80920
      Allen Dolph
      Participant

      Hey Roman,

      Thanks for the reply.  I mostly went with 1 strip of tape last weekend and that seemed to keep me right in the range you mention.

      Thanks,

      Allen

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