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Thread: Adjusting the adjustable suspension

  1. #11
    Head Moderator / Administrator doug's Avatar
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    DaveF, could you repost your photos? I have no idea why they're so tiny.

  2. #12
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    Quote Originally Posted by doug View Post
    DaveF, could you repost your photos? I have no idea why they're so tiny.
    I will but I am (obviously) photo challanged. They are on my iPhone. What do I do to post them?

  3. #13
    Rdstr254->725->MS1364 HUN DrTaras's Avatar
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    Totally a novice here, but I am greatly interested in understeer as I have been the victim of it in the past. When you buy the Roadster Sport they told me the suspension settings were set to "5" out of "10" and that you were entitled to one FREE change. When they change the settings do you know what they are referring to as it applies to the original post? Just shocks, or sway bar, etc?
    Over 150,000 page views of "The Hun!" Model S Xformation before there were any!

  4. #14
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    Quote Originally Posted by DrTaras View Post
    When you buy the Roadster Sport they told me the suspension settings were set to "5" out of "10" and that you were entitled to one FREE change.
    That's just the adjustable coilover shocks setting. That's not the only part of the adjustable suspension. They should realize there's more to the suspension than just the shocks. I'm sure they'd adjust the sway bar as well for you. For you, and anyone really, the adjustment of loosening the front sway bar is a safe and worthwhile change. I highly recommend it. Just be more careful if you turn off traction control, as it's easier to induce oversteer with power when driving near the limit.

    DaveF is still yet to play with his shock settings. I'm anxiously awaiting his findings. Right now his are all set to 5. And mine are all set to 1 (as I requested from the factory). Neither one of us have tried settings other than those.

  5. #15
    Rdstr254->725->MS1364 HUN DrTaras's Avatar
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    Shock setting 1 is stiffer or softer? It obviously affects ride comfort, but does it affect over/under steer?
    Over 150,000 page views of "The Hun!" Model S Xformation before there were any!

  6. #16
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    Quote Originally Posted by DrTaras View Post
    Shock setting 1 is stiffer or softer? It obviously affects ride comfort, but does it affect over/under steer?
    Tesla set mine at 1 when I told them to deliver my car with the stiffest setting. I questioned whether that was right when it didn't feel as stiff as my 3rd gen RX-7 R1. I couldn't find anything online to verify. I'd love someone to verify this for me or confirm. Right now I'm just trusting that Tesla was right and 1 is the stiffest setting.

  7. #17
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    My Tesla Sport came with the factory setting of 5.
    When it was recently in the Seattle service center, I asked Carl to dial it into the firmest setting possible.

    WOW !!!

    The car feels so damn good driving compared to before. It was a nice sports car before, but now I feel like I am driving a fighter jet. This car is so damn tight driving through turns and around other cars in traffic.

    Anyone with a Tesla Sport should do this.

    I don't have enough experience with performance sports cars to describe what is actually happening with any technical details. All I do know is that my Tesla Sport feels amazing. I drove 4,400 miles with the factory setting before the adjustment. So I really can tell something different with the car now. And is a MUCH better feel on the road.
    Last edited by Palpatine; 2009-12-04 at 10:00 AM.

  8. #18
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    So James, can you check what settings your shocks now have? Did they change the setting to 1?

    And have you loosened the front sway bar yet?

  9. #19
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    Adjustable Shock Details

    Correction to my earlier post: my shocks were factory set to 1 front and 10 rear. I thought they were all at 5 because the number facing out at each corner was 5. However, the shocks are read at the inboard side of the shock on my car. I say my car because they can easily have the bottom shock eye rotated 180 degrees. How to tell? On the fronts there is a very small red dot on the side of the mounting eye where the reading is taken - I have not had the rears off and can see no dot when they are mounted on the car. Another way to tell is to cycle the adjusting ring through the full cycle. That is a bit tricky if each shock is full against one of the stops as mine was delivered.

    Second: 1 is the softest, not firmest setting. 10 is the firmest. I felt this was true through internet research (our shocks appear to be the PSS10 model) and verified it on my shock dyno (high quality Roehrig).

    Third and most disturbing was that there was a post on another forum regarding a PSS9 Bilstein (9 position instead of 10) about a dyno test that showed the adjuster was close to useless with 8 settings the same for all practical purposes and only the firmest setting of 9 having any significant effect. I also saw a similar post on a PSS10 Porsche shock that showed complete and proper adjuster response. Unfortunately my dyno results were similar to the former PSS9 test . Settings 1 through 8 were virtually indistiguishable (tested at 4, 6 and 9 inches/second). Setting 9 increased rebound slightly and setting 10 made what I would consider a proper amount of change in rebound. Compression was changed very slightly but insignificantly at setting 10.

    The shock force seemed quite high overall (which is why high speed bumps like traffic lane markers, potholes and other abrupt pavement irregularities are so harsh). I did not take the time to rate the spring but will in due time.

  10. #20
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    Just got finished with the suspension settings. Front shocks now at 6 (were at 4), rears at 7 (were at 5). Both sway bars have been set to 3 (were at 2). Ride is a little harsh which doesn't bother me. Dramatic difference. Turn in is much smoother and more predictable. Balance is much better. Feels very flat and settled.
    I recommend this if handling is more important to you than ride.

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