Register now to get rid of these ads!

Technical Nick's Graffiti Coupe with a Man A Fre and (4) 2G Rochester Issues (Help Me with everything!)

Discussion in 'The Hokey Ass Message Board' started by Nicholas Coe, Feb 22, 2020.

  1. brigrat
    Joined: Nov 9, 2007
    Posts: 5,157

    brigrat
    Member
    from Wa.St.

    At some point clean intake and block surfaces and mock up intake without gaskets to see if it's hitting the ventilator canister. They make diff. length canisters BUT looks like you already have the short one. Also take a good look at clearance between mating surfaces, intake should not bottom out on the ends of block leaving a gap at intake gasket sides. If still having problems swap a known good carb from one side to the other to rule in or out the carbs. Are those rubber or cork end gaskets on the block? Nobody I know of uses them anymore...……………………….
     
    Last edited: Feb 28, 2020
    Nicholas Coe likes this.
  2. sunbeam
    Joined: Oct 22, 2010
    Posts: 4,847

    sunbeam
    Member

    Bolt the intake down with double sided carbon paper on the ports and see what you get. The canister should effect the back ports more than the front. Try using just sealer on the end rails you don't know if the heads were milled.
     
    Last edited: Feb 28, 2020
    Nicholas Coe likes this.
  3. Nicholas Coe
    Joined: Jul 5, 2017
    Posts: 1,450

    Nicholas Coe
    ALLIANCE MEMBER
    from Tontitown

    I agree. We noticed that the previous owner used the cork end pieces. That may have been just enough to prevent a good center seal.
    Sent from my Pixel 3a XL using The H.A.M.B. mobile app
     
  4. 2OLD2FAST
    Joined: Feb 3, 2010
    Posts: 2,344

    2OLD2FAST
    Member
    from illinois

    Tape off the intake ports so nothing accidentally gets dropped on them , get the correct gaskets , a LITTLE sealer around the water ports , a bead on the China walls , try again ....
     
    Nicholas Coe likes this.
  5. Nicholas Coe
    Joined: Jul 5, 2017
    Posts: 1,450

    Nicholas Coe
    ALLIANCE MEMBER
    from Tontitown

    Absolutely. I'll do that today. The tape is a good idea. I can't imagine what I would do if I dropped a bolt in there. I had a friend who "lost" a washer. He found it about halfway through the quarter mile at 110 mph!
    Sent from my Pixel 3a XL using The H.A.M.B. mobile app
     
  6. As far as sync the carbs , use a rubber fuel hose in your ear, put it at the top of each carb and listen, when you have the same sound in all 4 carbs they are in sync. It's like music ther're all on the same note.
     
    Nicholas Coe and saltflats like this.
  7. I'm certainly no expert but those intake ports look like they been hogged out & obviously the divider removed. Maybe leaking around there if gasket slips. Are the intake ports bigger than the hole in the gasket. Did those Man-a-fre manifolds come like that??
     
    Nicholas Coe likes this.
  8. brigrat
    Joined: Nov 9, 2007
    Posts: 5,157

    brigrat
    Member
    from Wa.St.

    They came that way just like the Creitz manifolds………………………...
     
    Nicholas Coe and Johnny Gee like this.
  9. Nicholas Coe
    Joined: Jul 5, 2017
    Posts: 1,450

    Nicholas Coe
    ALLIANCE MEMBER
    from Tontitown

    I thought that too. Apparently they came that way. Yes, that is definitely a weak point. We'll be starting to reassemble everything on Monday. We will be extremely careful with our gaskets and silicone.
    Sent from my Pixel 3a XL using The H.A.M.B. mobile app
     
  10. Moriarity
    Joined: Apr 11, 2001
    Posts: 18,086

    Moriarity
    SUPER MODERATOR
    Staff Member

    before you finish putting this back together make sure you follow @Mike VV post number 23. I suspect your biggest problem to be incorrectly adjusted idle speed screws and improperly adjusted linkage
     
    joel and Nicholas Coe like this.
  11. Nicholas Coe
    Joined: Jul 5, 2017
    Posts: 1,450

    Nicholas Coe
    ALLIANCE MEMBER
    from Tontitown

    I agree completely. The idle screws were only used on 1 carb. We're going to add the carbs and linkage carefully and insure everything is properly functional.
    Sent from my Pixel 3a XL using The H.A.M.B. mobile app
     
  12. sunbeam
    Joined: Oct 22, 2010
    Posts: 4,847

    sunbeam
    Member

    Most did not have a port divider but some had a small one.https://images.search.yahoo.com/sea...content/comment-image/520364.jpg&action=click These manifolds acted more like a IR manifold and took more carburetor.
     
    Nicholas Coe likes this.
  13. Moriarity
    Joined: Apr 11, 2001
    Posts: 18,086

    Moriarity
    SUPER MODERATOR
    Staff Member

    all of the idle speed screws need to be set the same or you will have "no vacuum" over the carbs where the throttle bores are completely shut.. also your wet plugs may indicate that one carb is flooding. pull the top off it and check the float level and make sure there is no dirt in the needle and seat and that the seat is tight with a good gasket on it. What number are the jets? my corvette has .049 and is a 350
     
    joel and Nicholas Coe like this.
  14. Nicholas Coe
    Joined: Jul 5, 2017
    Posts: 1,450

    Nicholas Coe
    ALLIANCE MEMBER
    from Tontitown

    We're using a Hi-Po 1965 Chevy 327 with fuelie heads. We're running blocked power valves due to the large duration cam. We're currently using 0.60 jets. I do think that it was the idle screws as a major issue. The car wouldn't even idle consistently at the same RPM. We're going to follow Mike exactly. I can't wait to test it with no linkage to see how everything was set up. Thank you!

    Sent from my Pixel 3a XL using The H.A.M.B. mobile app
     
  15. Nicholas Coe
    Joined: Jul 5, 2017
    Posts: 1,450

    Nicholas Coe
    ALLIANCE MEMBER
    from Tontitown

    Today is the reinstall day! Wish us luck again!

    Gasket test fit before trim. Small silicone smears at water jackets.... IMG_20200302_104934.jpeg IMG_20200302_105517.jpeg

    Sent from my Pixel 3a XL using The H.A.M.B. mobile app
     
    catdad49 and loudbang like this.
  16. Nicholas Coe
    Joined: Jul 5, 2017
    Posts: 1,450

    Nicholas Coe
    ALLIANCE MEMBER
    from Tontitown

    Gaskets trimmed and water jackets sealed. Ready for the intake! IMG_20200302_110640.jpeg

    Sent from my Pixel 3a XL using The H.A.M.B. mobile app
     
    catdad49 and loudbang like this.
  17. Nicholas Coe
    Joined: Jul 5, 2017
    Posts: 1,450

    Nicholas Coe
    ALLIANCE MEMBER
    from Tontitown

    Intake in on and all bolts tightened to spec. That's all for today. Hopefully, we will get her finished soon! IMG_20200302_135015.jpeg

    Sent from my Pixel 3a XL using The H.A.M.B. mobile app
     
    catdad49, loudbang and winduptoy like this.
  18. winduptoy
    Joined: Feb 19, 2013
    Posts: 1,941

    winduptoy
    ALLIANCE MEMBER

  19. mcsfabrication
    Joined: Nov 26, 2006
    Posts: 844

    mcsfabrication
    ALLIANCE MEMBER

    That cannister sure looks like the intake has been sitting on it.
     
    loudbang, Gasser 57 and Nicholas Coe like this.
  20. 333tinman
    Joined: Oct 24, 2009
    Posts: 40

    333tinman
    Member
    from MASS.

    My friend had a 3 deuce set up on his 327 . we chased a vacuum leak on it and found we could close of air flow to all 3 carbs and it would still run . the throttle shafts where worn and caused a vac. leak . they make over sized shafts and bushing I think he got them from a Pontiac sight . just wonder if that might help .
     
    loudbang and Nicholas Coe like this.
  21. Gman0046
    Joined: Jul 24, 2005
    Posts: 6,211

    Gman0046
    Member

    A friend of mine has a 4X2 setup on a 350 Chevy that can't get out of its own way. I'm convinced his car would run better on a single four barrel.
     
    Nicholas Coe likes this.
  22. Nicholas Coe
    Joined: Jul 5, 2017
    Posts: 1,450

    Nicholas Coe
    ALLIANCE MEMBER
    from Tontitown

    I'm sure it would!
    Sent from my Pixel 3a XL using The H.A.M.B. mobile app
     
  23. Nicholas Coe
    Joined: Jul 5, 2017
    Posts: 1,450

    Nicholas Coe
    ALLIANCE MEMBER
    from Tontitown

    We really thought it might as well. We checked our intake balance and gaps. All looked good.
    Sent from my Pixel 3a XL using The H.A.M.B. mobile app
     
    loudbang likes this.
  24. Nicholas Coe
    Joined: Jul 5, 2017
    Posts: 1,450

    Nicholas Coe
    ALLIANCE MEMBER
    from Tontitown

    That is definitely an Idea. All 4 of these carburetors were said to have been completely rebuilt. We may need to look closer. We are going to switch sides with the carbs to see if there is a definite carburetor issue. It is very odd since one side of the intake works perfectly!

    Sent from my Pixel 3a XL using The H.A.M.B. mobile app
     
    loudbang likes this.
  25. sunbeam
    Joined: Oct 22, 2010
    Posts: 4,847

    sunbeam
    Member

    Don't give up on the Man A Fre when they are right they really work
     
    loudbang and Nicholas Coe like this.
  26. Nicholas Coe
    Joined: Jul 5, 2017
    Posts: 1,450

    Nicholas Coe
    ALLIANCE MEMBER
    from Tontitown

    Thank you! We're installing the carbs now! Image%20(1).jpeg

    Sent from my Pixel 3a XL using The H.A.M.B. mobile app
     
    catdad49, loudbang and Johnny Gee like this.
  27. Nicholas Coe
    Joined: Jul 5, 2017
    Posts: 1,450

    Nicholas Coe
    ALLIANCE MEMBER
    from Tontitown

    We've noticed the passenger side of the intake had no idle adjustment cam or screw on either carburetor. This was allowing the butterflies to completely close at idle! That explains the dead vacuum on that side. IMG_20200304_103658.jpeg MVIMG_20200304_103604.jpeg IMG_20200304_103357.jpeg

    Sent from my Pixel 3a XL using The H.A.M.B. mobile app
     
  28. ^^^^^ Is this one one of those "I knew the problem all along so I'll have some fun with it posts? :cool:
     
  29. Nicholas Coe
    Joined: Jul 5, 2017
    Posts: 1,450

    Nicholas Coe
    ALLIANCE MEMBER
    from Tontitown

    No. Not at all! We were totally confused by the symptoms. It's funny how so many things are simpler than we make them out to be. Next week we'll be setting it up and tuning.


    Shout out and thanks to:

    Ed and Chris at New Age Motorsports
    Larry at Hot Rod Carbs (Automotion) IMG_20200304_103642.jpeg

    Sent from my Pixel 3a XL using The H.A.M.B. mobile app
     
    loudbang likes this.
  30. Blues4U
    Joined: Oct 1, 2015
    Posts: 4,669

    Blues4U
    Member
    from So Cal

    Hello! What's that you say?!?!

    I think we'v found the answer to the original question here.

    Oh well, a couple of days playing with the engine hasn't done you any harm, it's all good.
     

Share This Page

Register now to get rid of these ads!

Archive

Copyright © 1995-2020 The Jalopy Journal: Steal our stuff, we'll kick your teeth in. Terms of Service. Privacy Policy.

Atomic Industry
Forum software by XenForo™ ©2010-2014 XenForo Ltd.