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  •  » Even a blind squirrel gets it right sometimes.........

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    3/26/2014 6:50 AM  #1

    6sally6
    Hyper FYIFORD ADDICT

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    From: Surfside Beach,SC
    Registered: 4/02/2013
    Posts: 6,464

    Even a blind squirrel gets it right sometimes.........

    Ever since building my 5.0 engine a few years I've lived with the surging and bucking at low RPM's. I just thought it was part of living with a big cammed SBF. I had tinkered with the timing(22* initial and 36* total) and it helped some butt....still the bucking and rich carb.(Edelbrock 600cfm) continued.
    Wellll..went to the car show this weekend in Myrtle Beach,SC and the Edelbrock vendor truck was there. I told him about my 600cfm carb, low vacuum..big cam.. and bucking issues. First thing he reccommended...try a stiffer metering rod spring. Went home....put in the purple(I think) springs in and...bingo   huge improvement!! (like the Donald sez...."YOU-GE improvement").
    2 springs.....1 minutes worth of work...WOW!
    I guess..at idle.. the rough idle would lift the metering rods up out of the jets and then down again. Now the stiffer springs hold the metering down during the idle....When the vacuum and RPM increases the rods come up like they are suppose to. I guess thats how it s'pose to work?!!
    6sally6

    Get busy Liv'in or get busy Die'n....Host of the 2020 Bash at the Beach/The only Bash that got cancelled  )8
     

    3/26/2014 7:03 AM  #2

    Lance
    FYI Addict

    Offline

    Registered: 7/16/2013
    Posts: 152

    Re: Even a blind squirrel gets it right sometimes.........

    Isn't it cool when you run into people that know stuff?  I love that!  Congrats...

     

    3/26/2014 8:30 AM  #3

    BillyC
    I FYI 24-7

    Offline

    From: Chesapeake, Va.
    Registered: 4/02/2013
    Posts: 965

    Re: Even a blind squirrel gets it right sometimes.........

    6sally6 wrote:

    Ever since building my 5.0 engine a few years I've lived with the surging and bucking at low RPM's. I just thought it was part of living with a big cammed SBF. I had tinkered with the timing(22* initial and 36* total) and it helped some butt....still the bucking and rich carb.(Edelbrock 600cfm) continued.
    Wellll..went to the car show this weekend in Myrtle Beach,SC and the Edelbrock vendor truck was there. I told him about my 600cfm carb, low vacuum..big cam.. and bucking issues. First thing he reccommended...try a stiffer metering rod spring. Went home....put in the purple(I think) springs in and...bingo   huge improvement!! (like the Donald sez...."YOU-GE improvement").
    2 springs.....1 minutes worth of work...WOW!
    I guess..at idle.. the rough idle would lift the metering rods up out of the jets and then down again. Now the stiffer springs hold the metering down during the idle....When the vacuum and RPM increases the rods come up like they are suppose to. I guess thats how it s'pose to work?!!
    6sally6

    Thanks for the post Sal. I've had a similar problem with same carb on a 289. Gonna give it a try.

    "anyone that stops learning is old, whether at twenty or eighty"Henry Ford
     

    3/26/2014 8:38 AM  #4

    at
    FYI Addict

    Offline

    From: Tampa FL
    Registered: 4/02/2013
    Posts: 275

    Re: Even a blind squirrel gets it right sometimes.........

    Dear blind squirrel,
    That's one of the reasons back in the 50's, early 60's why the carter afb was taken off by their owners and replaced with holley's.

    You can lead a horse to water, but you can't get him drunk
     

    3/26/2014 10:13 AM  #5

    Michael H.
    I FYI 24-7

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    From: Laurel, MS
    Registered: 4/01/2013
    Posts: 869

    Re: Even a blind squirrel gets it right sometimes.........

    at wrote:

    Dear blind squirrel,
    That's one of the reasons back in the 50's, early 60's why the carter afb was taken off by their owners and replaced with holley's.

    Why?... because it's so easy to tune that you can fix your surging problem with 2 springs and 1 minute's worth of work?  Yeah... nobody wants that.

     

    3/26/2014 12:00 PM  #6

    RPM, aka Bearing Bob
    Senior 24-7 FYI Addict

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    From: Bakersfield, Ca
    Registered: 9/17/2013
    Posts: 3,261

    Re: Even a blind squirrel gets it right sometimes.........

    at wrote:

    Dear blind squirrel,
    That's one of the reasons back in the 50's, early 60's why the carter afb was taken off by their owners and replaced with holley's.

    Dear Just Saying,
    What are those 50's, early 60's things you're talking about???
     

    Bob. 69 Mach 1, 393W, SMOD Toploader, Armstrong  steering, factory AC.
     

    3/26/2014 12:04 PM  #7

    MS
    Forum Originator

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    From: Canyon Lake, Texas
    Registered: 1/24/2013
    Posts: 11,742

    Re: Even a blind squirrel gets it right sometimes.........

    Good info, sal !

    Money you enjoy wasting is NOT wasted money... unless your wife finds out.
     

    3/26/2014 12:33 PM  #8

    DC
    Senior 24-7 FYI Addict

    Offline

    From: Marshall, MI
    Registered: 4/01/2013
    Posts: 1,235

    Re: Even a blind squirrel gets it right sometimes.........

    Michael H. wrote:

    at wrote:

    Dear blind squirrel,
    That's one of the reasons back in the 50's, early 60's why the carter afb was taken off by their owners and replaced with holley's.

    Why?... because it's so easy to tune that you can fix your surging problem with 2 springs and 1 minute's worth of work?  Yeah... nobody wants that.

     
    Me thinks that whether you mess with the power valve or the springs on the metering rods, you does about the same thing. When you take any carbuerator down to it's basic functions all but the worthlessly simple ones have about the same functions and adjustability. Yes, I can adjust myself right into the ditch with any of them!  Which ever one you learn can be made to work pretty dawg gone good. Then there are the SU,s!

     

    3/26/2014 12:49 PM  #9

    at
    FYI Addict

    Offline

    From: Tampa FL
    Registered: 4/02/2013
    Posts: 275

    Re: Even a blind squirrel gets it right sometimes.........

    Michael H. wrote:

    at wrote:

    Dear blind squirrel,
    That's one of the reasons back in the 50's, early 60's why the carter afb was taken off by their owners and replaced with holley's.

    Why?... because it's so easy to tune that you can fix your surging problem with 2 springs and 1 minute's worth of work?  Yeah... nobody wants that.

     
    Because back then, you couldn't get any info from carter. Everyone should just be happy to run whatever they want.

    rpm says: What are those 50's, early 60's things you're talking about???

    Back then carter made a carb and called it an afb (aluminum four barrell)  Eddybock needed a carb to round out their line, and bought the rights.

    You can lead a horse to water, but you can't get him drunk
     

     

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