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Bottoming Out - 2

Discussion in 'Model S' started by Struja, Oct 4, 2017.

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  1. Struja

    Struja Struja

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    There is another thread on this but the focus of the thread was "damage to the battery", where as my focus is more about "other problems".

    This has now happened to me twice in two days and 3 times in total. The last incident happened less than an hour ago.

    I was driving through a parking lot at no more than 4-5km/hr (walking speed - maybe even slower) and I went over a pretty high speed bump at a very slow speed and after the front tires went over it, I got a pretty good thud and scraping sound.

    My car had bottomed out over the speed bump. I was going VERY slow... almost annoyingly slow (meaning if this was a car in front of me I might have been thinking..."oh come on, hurry up").

    I do NOT have the adjustable air suspension. I have NO alterations to the suspension.

    My tire pressure is perfect and I am on 19" Wheels.

    Worth a visit to the SC or just avoid similar speed bumps? (This speed bump seems to be a bit higher than what I would say was normal).
     
  2. shonline

    shonline Supporting Member

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    This happened to me as well. Same suspension as you. Looked under car and saw no issues. It is low rider for sure....
     
  3. jelloslug

    jelloslug Active Member

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    It as happened to me before as well with no issues.
     
  4. jjh1234

    jjh1234 Member extraordinaire and plenipotentiary

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    What was the other thread called?
     
  5. GWord

    GWord Member

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    Last weekend I was going to visit the Tesla design center near my location. The entrance to one of the parking lots is underground and had a pretty severe transition to the down ramp. I was traveling at a good clip (probably 10mph), because the entrance is right after a left turn through an intersection. Man, I absolutely nailed the car on it. I don't see much in the way of visible damage (some scarring to the plastic underneath) but I'll probably have the service center inspect next time I'm in for something else.
     
  6. Zaphod

    Zaphod Galaxy President (former)

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    If it's a "pretty high" speed bump as you say, not much you can do. Possibly try going over at a slight angle, but that usually only helps for driveway entrances. Might be difficult to go over at a reasonable angle in parking lots unless there are no cars coming the other direction.

    Problem is just that the S is fairly long wheelbase and fairly low to the ground and you are "high centering" the vehicle. You are not bottoming out, which would usually imply going over bump at speed. High-centering really has nothing to do with speed, it's just that the break-over angle is too shallow for the bump you are going over. Since you don't have air suspension, not much you can do other than be aware and either avoid or go over at angle if possible.

    [​IMG]
     
  7. Struja

    Struja Struja

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    Hey guys. Thanks for the responses, that was very reassuring.

    I will try different angles in the future.
     
  8. Dameon

    Dameon Titanium P90DL

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    Unlikely the angle will matter on a speed bump.
     
  9. scottm

    scottm Active Member

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    There is something you can do.

    Complain to the owner / operator of the parking lot that the bumps are too high and it has possibly caused damage to your car's undercarriage.

    The parking lot of the grocery store that I frequent, and once bottomed out on, has since replaced their speed bumps with much lower and broader ones. I don't bottom out there anymore.

    Upon inspection of my undercarriage, there was not even a scratch present on the underbelly panels after bottoming out there. Thankfully. It seems the side rails around the edges of the battery took the hit and held the car up preventing the battery pan from making contact.
     
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  10. Olle

    Olle Member

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    Happens to me too sometimes but the battery seems to have pretty nice protection rails along it. Going diagonally certainly helps for me, especially on these short tall yellow bumps where the front wheels fall down once they pass.
     
  11. scottm

    scottm Active Member

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    #11 scottm, Oct 4, 2017
    Last edited: Oct 4, 2017
    The other thing I do, which seems to work really well, is when there's a gap in the middle of the speed bump (to accommodate a gutter down the middle the road) steer that side of the car's wheels through the gap. Only the other side of the car drives over the speed bump.

    Or, sometimes I steer the right side of the car around the end of the bump near the, when there is no gutter gap in the middle.

    This keeps the car suspension from compressing down as much after an axle has gone over the bump. So you keep your ride height up as much as possible.
     
  12. zentage

    zentage Member

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    This is one of the main issues as to why I said bye to my 1k deposit and ordered a new car this summer after the air suspension was made standard.
    Tesla has been lowering their cars with standard suspension over the years.
    My 2014 S60 had ground clearance of 155mm and when I checked this summer standard suspension was as low as 134mm.

    I've only bottomed out once with my S60, but the thought of getting a new car with a lower suspension was giving me the creeps (especially for norwegian pothole roads).

    With air I can now raise the car to 160mm when needed.
     
  13. CHG-ON

    CHG-ON Still in love after all these miles

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    What helps with this issue is to try to go over the bump at an angle. I don;t have a problem with my car (SAS), but I always had it with lower sports cars.
     
  14. b team

    b team Member

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    Angle absolutely helps.
     

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