New to me 78 NYB on its way but please Don't tell my wife

Later Model C Bodies - "The Formal Years"

  1. commando1

    commando1 One Sick Puppy FCBO Gold Member

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    Had the same vibration. Drove me bonkers. You'll never guess where it came from. I happened to do an A-Z brake job on the rears.
    POOF. Vibration gone.
    Don't ask me why.
    And this was after I had the drives shaft balanced which did nothing.
     
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  2. 73 T&C

    73 T&C Senior Member FCBO Gold Member

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    This thing vibrates in “park”.
     
  3. 75LandYacht

    75LandYacht Yank Tank FCBO Gold Member

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    Mine went four times in a year. And it’s a Kenmore, disappointing to say the least. But once that goes, the rest of the unit is essentially useless. Money well spent. LOL
     
  4. commando1

    commando1 One Sick Puppy FCBO Gold Member

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    Replace that crappy Edelbrock :poke::rolleyes:
     
  5. 73 T&C

    73 T&C Senior Member FCBO Gold Member

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    You mean Thermoquad…… right?
     
  6. commando1

    commando1 One Sick Puppy FCBO Gold Member

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    Right.
     
  7. 73 T&C

    73 T&C Senior Member FCBO Gold Member

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    No chance until I get the Holley Sniper.
     
  8. commando1

    commando1 One Sick Puppy FCBO Gold Member

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    The engine runs like crap, according to your description. WTF are you waiting for then..... Jeezes Jav :poke:
     
  9. 73 T&C

    73 T&C Senior Member FCBO Gold Member

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    Holley sniper
     
    Last edited: Jul 22, 2021
  10. commando1

    commando1 One Sick Puppy FCBO Gold Member

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    :elmer:
     
  11. 73 T&C

    73 T&C Senior Member FCBO Gold Member

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    Still throwing rocks at the gremlin.

    Mile 329 of 500 and it’s better.

    Someone at the shop “adjusted” the carb to death. Bent the choke bar to keep it on. Set rich as hell even after I know I leaned it out when I initially brought it back to the shop.

    Think it’s the new guy trying to help.

    Miss is still gone. Vibration continues but less so.

    At least it looks beautiful.

    moving back into the house.
     
    Last edited: Jul 25, 2021
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  12. Mr C

    Mr C Senior Member

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    My heavens this thing is beautiful. The Forged aluminum Cordoba rims look great and right at home on it.

    I hope you get it running the way you want...glad it's improving.
     
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  13. 73 T&C

    73 T&C Senior Member FCBO Gold Member

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    Note on the alum rims…..

    Just so everyone knows. You need to up the studs to 3” to mount the alum rims. Other than careful placement of taped balancing weights to avoid calipers, they bolt right in.
     
    Last edited: Aug 3, 2021 at 9:27 AM
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  14. 73 T&C

    73 T&C Senior Member FCBO Gold Member

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    Mile 495 on new engine. Better but still not right. More methodical rock throwing and insights.

    Timing set at 18 degrees BTDC. Starts right up every time. No pinging.

    Choke set and working fine. Two good pumps cold and I’m golden.

    Vibration bad cold but diminishes with temp. Always there…… SHIT!

    Final temp fine at center or just above center of gauge….. depending on fan mode.

    All plugs appear to be firing fine. Rpm set at 850 no load. Engaging drive drops it about 75 rpm. With addition of A/C on, rpm drops another 50rpm warm and is at edge of instability cold and when choke comes off. No Bueno

    The lean burn advance program is a real drag on the engine with the slowed return to advance built into it.

    I spoke with Holley about the ignition system I should use. I can go either way with replacing the lean burn with standard Chrysler electronic ignition or stick with the Lean Burn distributor and index it with the Holley computer. The Holley would be taking over the timing tasks from the Lean Burn. That allows me to program in advance more precisely and will add some fun and life to the project.

    Obviously, I would prefer the most complicated install. It keeps the car looking stock upon initial examination but would be loads more fun to dial in.

    But for now, I figured I would keep it simple to start and ordered the Mopar kit for $150 bucks. It is plug and play with the Holley Sniper.

    Put in a zinc additive to the oil (STP) as I continue my search for that gremlin. Couldn’t hurt.

    All moved in to the refurbished house….so I can focus on it a bit more. Just some sorting, cleaning and planning for the next steps to go on the exterior rehab. It looks ok but it needs some love.

    I’m going to run a full compression check on engine myself next. Then a leak down test… again doing it myself.

    Even if I end up junking the engine, all the new parts will be reusable.

    I’m driven purely by curiosity at this point so frustration is waning. Perhaps Spartacus has gotten his second wind….
     
    Last edited: Aug 3, 2021 at 10:01 AM
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