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Roadster rear under trays

Discussion in 'Roadster: Performance' started by Perrin21, Feb 16, 2015.

  1. Perrin21

    Perrin21 Member

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    I recently saw a lotus elise in the air and i noticed that the rear under tray has some slits cut into it for airflow into the engine. The Telsa roadster doesn't have this and has a sealed under tray. The slits would add additional cooling to the motor which is located just above. I wonder why Tesla changed the under tray or if they even knew that the Elise had cutouts for air flow? Has anyone swapped out the under trays to see if motor and pem temps were improved?

    lotuseliserearundertrayremoved.jpg
     
  2. ecarfan

    ecarfan Well-Known Member

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    I'm sure Tesla inspected an Elise during the Roadster design period. The Tesla underbody may be smoother than the Elise because of the drag reduction advantages.
     
  3. Perrin21

    Perrin21 Member

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    I wonder what motor cooling these ducts would provide?
     
  4. Chillout

    Chillout Member

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    I'm pretty sure an Elise would have more heat around the engine area than a Roadster can have. Therefore it needs additional cooling.
     
  5. Doug_G

    Doug_G Lead Moderator

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    Much, much more heat. The electric motor dissipates a few percent of the input energy; an ICE more like 75% to 80%. At the same power output, the ICE is generating at least 25X more heat.
     
  6. dhrivnak

    dhrivnak Active Member

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    #6 dhrivnak, Feb 17, 2015
    Last edited: Feb 17, 2015
    I would also be wary of scooping up leaves and dirt that will leave the PEM worse off. With no air filter and the fan motors located low in the rear of 2.0 and 2.5 models I would be worried about making things worse as any debris would be thrown by the fan into the PEM.
     
  7. Perrin21

    Perrin21 Member

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    Debris is already thrown by the fan into the PEM. I just thought this looked like a good idea.
     

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