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Hot Rods Carb adjustment...

Discussion in 'The Hokey Ass Message Board' started by rustydusty, Apr 18, 2019.

  1. rustydusty
    Joined: Apr 19, 2010
    Posts: 875

    rustydusty
    Member

    Just rebuilt the Edelbrock 1406 carb, installed a fuel pressure regulator and gauge.
    The fuel pressure is around 5psi and the engine is running pretty well. I feel like it's running a little rich. The needle valves were open 2 1/4-2 1/2 turns each, which seems pretty excessive to me. One needle valve was damaged, so I switched it for one from a spare carb I have. That carb needle was also open 2 1/2 turns. Is this standard? I haven't used either carb before. The car also has flamethrowers installed (which I don't plan on using) which could also explain why it is running rich.
     
  2. saltflats
    Joined: Aug 14, 2007
    Posts: 9,121

    saltflats
    Member
    from Missouri

    2 1/2 turns doesn't sound that far off.
     
  3. what size are the Jets and the Metering rods? and what color are the Step up springs?
     
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  4. rustydusty
    Joined: Apr 19, 2010
    Posts: 875

    rustydusty
    Member

    I hate to say, that I have no idea. Not much included with carb kit- some gaskets, float needles and seats, 2 check balls that were both larger and smaller than the one that was in the carb. Basically just a cleaning kit...
     
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  5. ZZ Top Chop
    Joined: Aug 12, 2018
    Posts: 142

    ZZ Top Chop
    Member

    I maybe wrong, but I thought 2 1/2 turns is the rough set up on a carb, then fine tune from there. But I could be wrong. You said you feel its rich, but what is it doing? Black smoke? Are you using the electric choke and did you tune this up after the rebuild too? Are you holding the pedal down once to set the choke and then letting the engine warm up before pressing on the gas again? Am I asking tooo many questions?????
     
  6. Chavezk21
    Joined: Jan 3, 2013
    Posts: 539

    Chavezk21
    Member

    Put a vacuum gauge on it and adjust in or out until you are pulling most amount of vacuum once warmed up. I usually start at 1 1/2 turns and in, out from there. Some guys turn them it til it starts to stumble then back off til it smooths out.
     
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  7. rustydusty
    Joined: Apr 19, 2010
    Posts: 875

    rustydusty
    Member

    No black smoke, just smells gassy (kinda like me...)! Sounds "cammy" at an idle, and no, I did not adjust the electric choke. I will probably do away with it and install a manual choke. I like to know what my choke is doing from inside the car...
     
  8. ZZ Top Chop
    Joined: Aug 12, 2018
    Posts: 142

    ZZ Top Chop
    Member

    No black smoke, just smells gassy (kinda like me...)! :D:D:D. Have you checked to see what your plugs look like?
     
  9. Happydaze
    Joined: Aug 21, 2009
    Posts: 714

    Happydaze
    ALLIANCE MEMBER

    Everything you need to know is on the Edelbrock website where you'll have access to the installation and tuning guides.

    The needle valves are only for idle mixture. Beyond that it's needles, jets and springs, so adjustment or tuning requires parts to accomplish (beyond the accelerator pump shot). The parts are in what I think is called their strip kit, which are carburettor model dependent.

    If you're like me you'll lose the tiny hairclip things that seem to be irreplaceable. If you find a good source, please let me know!

    Chris
     
  10. rustydusty
    Joined: Apr 19, 2010
    Posts: 875

    rustydusty
    Member

    I haven't had it out for a high speed run yet, so no, I haven't done a plug reading. Before I rebuilt the carb, and installed the fuel pressure regulator, it was flooding out in about 20 seconds. So I am sure the plugs are black as pitch. I just acquired this car, so am working on correcting all the previous owners f**k ups...
    Check out this wiring!! 0403191024a.jpg 0403191024a.jpg
     
  11. jbon64
    Joined: Jul 26, 2006
    Posts: 437

    jbon64
    ALLIANCE MEMBER

    ditto on what happydaze said. i had really good luck tuning my 600 after reading up on the procedure then taking my time and doing it step by step. had frustrating results trying to tune a holley years ago ,but the eddy seemed so much easier .
     
  12. ZZ Top Chop
    Joined: Aug 12, 2018
    Posts: 142

    ZZ Top Chop
    Member

    not too bad, there's been worse posted on here. When you move the needles does the engine respond accordingly or does it seems like its not changing? I rebuild my 1406 a couple of months ago, was my first time.
     
  13. rustydusty
    Joined: Apr 19, 2010
    Posts: 875

    rustydusty
    Member

    Seems like it isn't changing...
     
  14. 6sally6
    Joined: Feb 16, 2014
    Posts: 450

    6sally6
    Member

    Are you POSITIVE you don't have a vacuum leak?!
    2 1/2-2 1/4 turns are normal.(fine tune after engine gets warm.)
    Does it have a snotty idling camshaft?
    May be able to "help" it with different needles and springs. (Jets after that)
    EZ to tune!!!!(compared to a Holley)
    Timing advance makes a big difference in "gassy smell"
    6sally6
     
  15. rustydusty
    Joined: Apr 19, 2010
    Posts: 875

    rustydusty
    Member

    It does have a "snotty" idling cam. The guy I bought it from didn't build it and owned it about a year and never tagged it. He had little, or misinformation about the engine build... It has a '66 283 that the previous owner said had been "stroked". Said he told him it was stroked to 383 cu in! Say what??? That's a hundred more cubes! Riiight...
     

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