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What did you do to your 365 GT4 2+2/400/412 today?

Discussion in '365 GT4 2+2/400/412' started by OttoB, May 29, 2015.

  1. OttoB

    OttoB Formula Junior

    Aug 17, 2013
    643
    Palm Beach, FL
    I was driving the car the other day when a puff of smoke (smelled badly) came out of the center a/c vents as the radio turned off all of a sudden. This nor any other electrical glitches having occurred before in the past 8 years, led Michel to source the cause of the “haywire”.

    When he found the relay pictured above, looking very much like an electrical jellyfish, it very well likely had something to do with it since the radio began working great thereafter…
     
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  3. SouthJersey400i

    SouthJersey400i Formula 3

    Mar 14, 2007
    1,400
    Romulus, NY (Finger Lakes)
    Full Name:
    Ken Battle
    This weekend we gave our '84 400i a good workout. Friday morning we left our Finger Lakes home and drove to the Adirondacks near Lake George; its was about 3.5 hour drive much on county roads. We picked up a bear there, see pic. We then drove south 2+ hours to Mt.Temper in the Catskills, staying overnight at the Emerson Inn. Saturday we drove the Catskill Conquest Rally, The 1903 Automobile Endurance Run. This is a one day touristic rally, no times or deadlines and stop where you wish at shops, festival, scenic views, etc. The variety of cars is amazing as the couple of pictures indicate, with the 1932 Pierce-Arrow 54 Club Sedan as the star of the show. There were two other Ferrari's: 1961 yellow 250 GTE and 1915 California T. It took a bit over 2 hours to the end point going thru several small towns of historic interest (to some). We had a pub lunch and returned to the Inn via one of the recommended routes without doubling back over the same roads.
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  4. Al Campbell

    Al Campbell Formula Junior
    Silver Subscribed Owner

    Nov 22, 2013
    506
    Australia
    samsaprunoff and Schumi like this.
  5. simon klein

    simon klein Two Time F1 World Champ
    Silver Subscribed Owner

    Feb 25, 2009
    21,514
    North Qld
    Full Name:
    simon klein
    Nice work Al!
     
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  6. raemin

    raemin Formula 3

    Jan 16, 2007
    1,004
    Lyon (FR)
    Full Name:
    R. Emin
    Control pressure regulators (a.k.a WUR), the hard way.

    The idea is to push out (1mm) the cylinder that hold the stainless diaphragm. As the diaphragm gets away from the pressure springs, the control pressure will drop. From then on put the WUR back in the engine bay and lightly tap on the cylinder in order to push again the cylinder inside the WUR, which will apply more pressure on the diaphragm.

    (cold pressure is a lot easier, but it works the other way round when you tap on the zinc plated pin which is next to the "France" marking, this reduces the cold pressure)
     
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  8. raemin

    raemin Formula 3

    Jan 16, 2007
    1,004
    Lyon (FR)
    Full Name:
    R. Emin


    As I've said in the other thread it still pollutes way too much, but I am so happy to hear again this old friend.
     
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  9. raemin

    raemin Formula 3

    Jan 16, 2007
    1,004
    Lyon (FR)
    Full Name:
    R. Emin
    If it were not for this leaky head, the engine would be perfect... Here performing the fine-tuning with transparent spark-plugs, you can hear how the RPM increases when the combustion transitions from yellowish to blue.

     
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  10. SouthJersey400i

    SouthJersey400i Formula 3

    Mar 14, 2007
    1,400
    Romulus, NY (Finger Lakes)
    Full Name:
    Ken Battle
    raemin
    What RPM are you doing the tuning with the transparent plug? Is that where you want it optimum?
    Ken
     
  11. raemin

    raemin Formula 3

    Jan 16, 2007
    1,004
    Lyon (FR)
    Full Name:
    R. Emin
    The k-jet is slightly lean at mid-range, so I adjust idle to slightly rich and then check that I am not starving the engine at mid-range (3000rpm). The transparent plugs are fragile, and mine are 20 years old, so even if the leaflet says they can sustain high rpm, I do not push the rpm to redline. In any case the K-jet are much more rich at wide open throttle, so no point in chasing a perfect tune there.

    As an additional check I also pull the throttle so as to trigger the vacuum enrichment (during this transition you can see that the control pressure slightly "bumps"): the objective is to validate that once again the spark is still consistent and does not become either grossly rich or way to lean during this transition. So far I did not replace the vacuum diaphragms of the WUR (that's a lot of work and the membrane are not exposed to gasoline), so checking the proper operation of this old membrane is necessary.

    Whenever I have some spare time I will post the full disassembly of my K-jets, that's a one day job well worth the effort.
     
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