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Model 3 Teardown - What's under the Frunk?

Discussion in 'Model 3' started by Ingineer, Feb 16, 2018.

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  1. omgwtfbyobbq

    omgwtfbyobbq Active Member

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    Jack it up baby! It's for being in the middle of nowhere with either no tows or an excessive amount of time before someone can get there. A tire patch kit and a small compressor are still fine most of the time, but sometimes you get flats you can't patch in places where help is hard to come by.
     
  2. aronth5

    aronth5 Long Time Follower

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    No. Minimizes differences between the AWD and RWD versions which keeps costs down Why have to make design changes and have a least some differences in parts for the extra space you would gain? Just adds complexity and I also wouldn't classify it as "cavernous" volume.
     
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  3. stopcrazypp

    stopcrazypp Well-Known Member

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    Ditto here. It saves them another configuration to build on the frunk. The Model 3 front motor takes up less space anyways, so it's less of a loss than in the S.
     
  4. cwerdna

    cwerdna Active Member

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    I don't want to go too far OT but I'm not sure what you mean by "second generation units". The replacements of DUs for noise on the S seem to have mostly died down but there are definitely still replacements for complete failure (loss of propulsion). I posted a few examples of DUs that from the last 2 years or so at First Model 3 motor failure reported.

    If we want to discuss Model S or X DU replacements or failures, we should probably take it to another thread.
     
  5. Brentt

    Brentt Member

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    Great video! It’s apparent the M3 is pretty much designed for both motors. I can see Tesla adding
    A future option for a second motor, after purchase.
     
    • Disagree x 1
  6. lunitiks

    lunitiks ˭ ˭ ʽʽʽʽʽʽʽʽʽ ʭ ʼʼʼʼʼʼʼʼʼ ˭ ˭

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  7. Saghost

    Saghost Well-Known Member

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    The dual motor cars all use a different, smaller drive motor assembly that Tesla presumably designed using feedback from the fleet performance of the Model S with the big motor.

    That's why I was calling them second generation - the real point is that the motors they're building now don't have any real failure history that I've read.
     
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  8. HankLloydRight

    HankLloydRight Fluxing

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    Doesn't work that way. They'd have to pull/replace the entire front-end, and probably even more stuff.

    It would be much cheaper just to sell/rebuy if you want a DM car.
     
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  9. Drax

    Drax Member

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    @HankLloydRight Agreed. There’s no way Tesla offers AWD as a hardware upgrade.

    ... That’s not to say someone couldn’t do it, though. It’s a really interesting idea! I wonder if @wk057 has started tearing into his 3 yet?
     
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  10. Brentt

    Brentt Member

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    There will be lots of wrecked model 3’s. If it’s a true mass market car, Just swap in the new motor and other parts.
    The hardest thing would be getting the software to recognize the new motor.
    Give the gear heads a couple of years and you will see rodded M3’s everywhere.
     
  11. Drax

    Drax Member

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    This thread has got me thinking.. What sort of undertaking it would be to just make a larger frunk tub to drop in? The 3’s frunk is comically small, but if there’s as much extra space as I think there is (at least enough for a carry on) it could be a great aftermarket option.
     
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  12. hiroshiy

    hiroshiy Supporting Member

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  13. Saghost

    Saghost Well-Known Member

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    From what I saw in the video, I'm thinking it's not practical because of the geometry. The extra space for the front motor isn't directly below the existing Frunk - it's behind and below, with the radiator and twelve volt creating a pinch point in between.
     
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  14. JRP3

    JRP3 Hyperactive Member

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    Exactly, you can't get to the extra space from the top.
     
  15. Limax

    Limax New Member

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    Very interesting if his motor type assertion is correct. The switched reluctance motor principle among others promises simplicity, efficiency and cooling advantages compared to some of the more common motor technologies.

    A little bit of doubt though. Both of the two recent dyno measurements of the Model 3 shows a steady and near linear drop of power, from max power, as rpm increases. This is similar to the Model S/X motors, and to any electric motor that experiences a counter electromotive force.

    I believed that one of the benefits of a switched reluctance motor, was that the solid or laminated iron rotor does not make a counter emf (back emf) when spinning, and that the power output from max power rpm towards max rpm thus should be nearly constant.

    The power drop could nevertheless have other reasons, so I am looking forward to more information.
     
  16. Sonny Daze

    Sonny Daze Member

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    Jack Rickard discusses possible switched reluctance motor. (17:45)

     
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  17. moridin2002

    moridin2002 Member

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    Permanent magnet machine that utilizes switched reluctance effects. If it were pure switched reluctance, there would be no permanent magnets on the rotor.

    Both BMW and Chevy have done this with the i3 and Bolt, respectively.
     
  18. e-FTW

    e-FTW New electron smell

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    I for one am quite happy that this motor is used on Semi. Upgrades my longevity estimates.
     
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  19. e-FTW

    e-FTW New electron smell

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    Hey @Ingineer here's a question: based on what you see (or measure), do you reckon the dual-motor will use two of this same motor?
    Or do you see extra room for a larger motor in the back than what is there right now (for a performance version)?
    Or is the room up front not enough to fit the same size motor as what is in the back right now?
     
  20. JRP3

    JRP3 Hyperactive Member

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    I think it's supposed to be 2 smaller motors for the AWD, maybe a small motor plus large motor for a P version.
     

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