355 - spider top question | Page 6 | FerrariChat

355 spider top question

Discussion in '348/355' started by TrojanFan, Jan 22, 2022.

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  1. Carmellini

    Carmellini Formula 3

    Jul 16, 2019
    1,013
    I am very happy about the entire project; gave us some steady pushback, but, in the end works like a charm.

    off topic, did you ever source these bits? Next project is to replace my work out elastic straps

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  2. Qavion

    Qavion F1 World Champ
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    Feb 20, 2015
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    Nope, I was waiting for some guru to make them out of two part moldable silicon rubber. That stuff is usually expensive, so you would have to make quite a few to get your investment back. Anyway, I don't have either of mine to make a mold.
     
  3. Carmellini

    Carmellini Formula 3

    Jul 16, 2019
    1,013
    What is the purpose of these rubber covers/boots?
     
  4. Qavion

    Qavion F1 World Champ
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    The shape of your metal piece that the rubber cap sits on looks different to mine. Yours is almost squared off. Mine is semi-circular.

    I guess the function is to stop vibration and to help keep the roof shape with the roof up and perhaps stop metal to metal contact with the roof in certain positions?
     
  5. Carmellini

    Carmellini Formula 3

    Jul 16, 2019
    1,013
    I boosted that photo from another thread. I am missing my rubber boots.
     
  6. Qavion

    Qavion F1 World Champ
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    Ah.. nevermind. I thought your photo showed the metal part only. After a second look, I think I see a rubber boot (squared off at the bottom).

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    I have seen different shaped boots to this (broader ones, also with a squared bottom).
     
  7. Qavion

    Qavion F1 World Champ
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    Feb 20, 2015
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    Full Name:
    Ian Riddell
  8. Qavion

    Qavion F1 World Champ
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    Feb 20, 2015
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    Full Name:
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  9. WATSON

    WATSON Two Time F1 World Champ
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    Sep 9, 2010
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  10. Carmellini

    Carmellini Formula 3

    Jul 16, 2019
    1,013
    Unfortunately, that is correct. The emergency switch allows for the top to work around the signals the roof ECU requires. When the top is closing and the primary cylinders are at full compression (this is the Ferrari term: I call it extension) , they trigger micro switch S4 for left cylinder, and S2 for right cylinder which sends a ground signal to the ECU via A05 and B13. Once the ECU receives these ground signals, it sends a ground signal to your secondary cylinder(s) solenoid F1. F1 is always hot with key on, and once it receives the ground via A08, the solenoid activates and directs fluid to flow to the secondaries.

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    Simple to test: Locate F1 solenoid and remove the connector. Connect a 12v+ wire to the side of the solenoid where the red wire would have been. Next, connect a lead to the other side where the black/red wire would be and when the top is as far up as it can go, while continuing to push on the UP button for the top, ground that wire. You will hear a rather faint click from the solenoid and the secondary rams will work. Since yours have not been working, it may take a few seconds. Also, check your fluid: mine were not working for a long time, and once they were, I had to add fluid to the reservoir.

    Caveat: I am pretending to have great knowledge about, but everything I have mentioned was taught to me by Qavion (Ian) a few weeks ago. With his help, I was able to wire in a relay that allows my secondaries to work properly. Its amazing how little things like that make a grown man happy......LOL
     
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  11. Qavion

    Qavion F1 World Champ
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    Basically, the emergency switches bypass the roof ECU electronics and only have control of the pump motor up/down relays. They don't have control of the "F1" solenoid valve which allows the pump pressure to reach the secondary rams. The F1 solenoid valve only opens when commanded by the Roof ECU when closing the roof.
     
  12. WATSON

    WATSON Two Time F1 World Champ
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    I am trying to figure out with the secondary rams even do.

    Based on my messing around this morning it is hard to tell.
     
  13. Carmellini

    Carmellini Formula 3

    Jul 16, 2019
    1,013
    I found this on Youtube: Go to 1:50 to 1:53 and you will see what the secondary rams do.

     
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