FYI FORD - MustangSteve's Ford Mustang Forum
The Internet's Most Knowledgeable Classic Mustang Information
IF YOU HAVE A QUESTION ABOUT CLASSIC FORD MUSTANGS, YOU HAVE COME TO THE RIGHT PLACE!
MustangSteve has over 30 years of Mustang experience, having owned 30 of them and restored several others. With the help of other Mustangers, this site is dedicated to helping anyone wanting to restore or modify their Mustang.... THERE ARE NO DUMB QUESTIONS!!!!!
Visit MustangSteve's web site to view some of my work and find details for:
FYIFORD Contributors' PICTURES - Power Brake Retrofit Kits for 65-66 Stangs - Classic Mustang FAQ's by MustangSteve - How to wire in a Duraspark Ignition - Mustang Ride Height Pictures and Descriptions - Steel Bushings to fit Granada Spindles to Mustang Tie Rods - Visit my EBAY store MustangSteve Performance - How to Install Granada Disc Brakes MustangSteve's Disc Brake Swap Page - FYIFORD Acronyms for guide to all the acronyms used on this page - FYIFORD Important information and upcoming events

You are not logged in. Would you like to login or register?

  • Index
  •  » FYI Ford, Classic Mustang Tech Discussion
  •  » Holley carb must

    • 1 of 1

       

    4/01/2020 1:27 PM  #1

    Rudi
    Senior 24-7 FYI Addict

    Offline

    From: Stuck in the 50's Welland Ca
    Registered: 4/01/2013
    Posts: 3,976

    Holley carb must

    There has been a bit of talk here lately on carbs so I thought I'd add this.
    If you have a Holley carb you need this.
     I used it in it's entirety about 15 years ago when I bought a Street Avenger 670 for my 331. It is a long read but well worth the education.
    Once it's set up you will have an easy starting engine  with the proper three stages of idle, considering  all other engine parameters are  as they should be.
     I can honestly say my carb has not been touched since.
     No reason why you can't do the same.
    http://bob2000.com/carb.htm

    Good work ain't cheap, Cheap work ain't good!   Simple Man
     

    4/03/2020 7:57 AM  #2

    Nos681
    Senior 24-7 FYI Addict

    Offline

    From: Atlantic Mine, Michigan
    Registered: 7/14/2016
    Posts: 3,337

    Re: Holley carb must

    Thanks Rudi.

    I will definitely save this information...
    hopefully I can find it when I need it.😂

    My wife‘s ‘79 F150 has an off-road Holley, I know it runs rich for off road applications.
    It came with the truck with a Offy 4 barrel intake as well (300 ci).
    I might even try rebuilding the old one off the Mustang with this new resource.

     

    4/03/2020 8:21 AM  #3

    TKOPerformance
    Hyper FYIFORD ADDICT

    Online!

    From: Newark, DE
    Registered: 12/15/2014
    Posts: 7,511

    Re: Holley carb must

    I'm guessing that's on a 6 cylinder Nos681.  We used that setup on a couple Jeeps over the years.  It was a 390cfm 4 barrel I believe.  They are set up fat because otherwise they will run out of fuel on a hill climb.  I found that if I just bumped the idle speed to like 1,500 on my CJ5 with the stock 1 barrel it did the same thing.  Some guys use a hand throttle to prevent the throttle plate from slamming shut when their foot bounces off the pedal, which would usually stall the engine.  Few things are as hairy as sliding backwards down a hill that's extremely steep with trees on either side of you. 
     

     

    4/03/2020 8:53 AM  #4

    Nos681
    Senior 24-7 FYI Addict

    Offline

    From: Atlantic Mine, Michigan
    Registered: 7/14/2016
    Posts: 3,337

    Re: Holley carb must

    Straight 6, 4 speed, 4x4 with 285/75/16 for now.

    About the only hill climbing this thing will see is the single track dirt/gravel road into her family’s camp.
    It’s a cruiser...just a summer toy for her.
    It’s not perfect, still fun.
    She loves her Flowmaster...single 3”
    I know she can’t wait to start driving it for summer.


     

    4/03/2020 9:47 AM  #5

    TKOPerformance
    Hyper FYIFORD ADDICT

    Online!

    From: Newark, DE
    Registered: 12/15/2014
    Posts: 7,511

    Re: Holley carb must

    Good looking truck!  They are tough and dependable, even when lifted.  A lot of guys in our old 4x4 club ran those trucks or Broncos from the same generation.  Our most colorful member stenciled is tailgate with the words "Jeeps are like tampons every $%^&y needs one".  We all ran fullsize rigs.  I always had a Jeep too, but only ran it around the farm and woods by my place.  Good times. 

     

    4/03/2020 1:21 PM  #6

    MS
    Forum Originator

    Offline

    From: Canyon Lake, Texas
    Registered: 1/24/2013
    Posts: 12,279

    Re: Holley carb must

    Thanks for posting that, Rudi.

    It needs to get posted in the Tips and How To forum, as well.

    Great information!

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

    4/03/2020 2:48 PM  #7

    RV6
    Senior 24-7 FYI Addict

    Offline

    From: Pine Junction, CO
    Registered: 3/01/2016
    Posts: 1,250

    Re: Holley carb must

    Nos681 wrote:

    Straight 6, 4 speed, 4x4 with 285/75/16 for now.

    About the only hill climbing this thing will see is the single track dirt/gravel road into her family’s camp.
    It’s a cruiser...just a summer toy for her.
    It’s not perfect, still fun.
    She loves her Flowmaster...single 3”
    I know she can’t wait to start driving it for summer.


    What a sweet F150!

    Gary Zilik - Pine Junction, Colorado - 67 Coupe, 289-4V, T5
     

    4/03/2020 3:03 PM  #8

    Rudi
    Senior 24-7 FYI Addict

    Offline

    From: Stuck in the 50's Welland Ca
    Registered: 4/01/2013
    Posts: 3,976

    Re: Holley carb must

    Way back when, I put the 331 in the 68,  Pep Boyz had a super deal on a 670 Street avenger, vacuum secondaries.
    I mounted it on the Performer RPM manifold and it ran ok but with some minor idle and hesitation issues.
    I used this manual to make adjustments and changes to the carb. I won’t go into detail here on exactly what I change because every set is different and also mostly, I don’t remember.

    Since that time I put a lot of miles and many full two and three day trips with the car. I can truthfully say I have not touched the carb since then, honestly, never.  Also Ihave not encountered the “ so called dreaded, going out of tune”  syndrome perpetrated on Holley carbs.
    Oh yeah, no off roading involved at any time. 

    I have no hot or cold starting issues.
    The way I have it set is, cold, two pumps of the gas pedal to the floor, the engine starts on fast idle, about 1200 revs.
    After a minute or less a tap on the pedal, the rpm drops to mid point idle of around 1000.
    Once the engine warms up a bit an other tap of the pedal and it goes to regular idle around 700 rpm.
    When hot,  I push down the loud pedal about a third  and get an instant start.
    With A/C on I get about a 50 rpm drop

    I do hope any one here with a Holley gets the same results as I have .
    Cheers mates!

    Good work ain't cheap, Cheap work ain't good!   Simple Man
       •Thread Starter
     

    4/03/2020 6:19 PM  #9

    Nos681
    Senior 24-7 FYI Addict

    Offline

    From: Atlantic Mine, Michigan
    Registered: 7/14/2016
    Posts: 3,337

    Re: Holley carb must

    Gary...
    thanks...it’s next best thing to a Mustang.


    Rudi....
    The truck runs good, I know it can run better.
    Haven’t done much to it since we bought it three years ago...on April 1st😁
    Just tune up, oil change, tires and exhaust.
    Looks like I...I mean “we” may have time to tune the Holley this year.

     

     

    1 of 1

  • Index
  •  » FYI Ford, Classic Mustang Tech Discussion
  •  »  Holley carb must

    • Board footera


    REMEMBER!!! When posting a question about your Mustang or other Ford on this forum, BE SURE to tell us what it is, what year, engine, etc so we have enough information to go on.