Dual Sidedraft Carb Set up
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Thread: Dual Sidedraft Carb Set up

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    First Time Opeler dragonswar84 is on a distinguished road
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    Dual Sidedraft Carb Set up

    Hello all,
    I just purchased a dual side draft Weber carb setup fpr my '70 gt on ebay. It arrived with what looks like all the parts needed to do the deed but no instructions. This setup is from cannon I think. Does anyone out there know where I can find some instructions? Thank you all
    Last edited by tekenaar; 04-19-2010 at 09:52 AM. Reason: webber?

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    Just an old fart My location wrench459 will become famous soon enough wrench459's Avatar
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    Quote Originally Posted by dragonswar84 View Post
    Hello all,
    I just purchased a dual side draft webber carb setup fpr my 70' gt on ebay. It arrived with what looks like all the parts needed to do the deed but no instructions. This setup is from cannon I think. Does anyone out there know where I can find som instructions? Thank you all
    The DCOE's really needs a expert to set them up properly and I'm not saying that include's
    myself.
    Black Horse

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    baz
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    If you need to ask then it's no good fitting them , pop then in a box wrapped up well in bubble wrap and send them to me , I'm sure I can find a nice home for them some place







    as Dan says theres no real way to set them up unless on a dyno to get them right

    There are a few million posts on jetting for them in here , have a search to find one with your engine spec and check the jets and emulsion tubes are the same , this will get you close . after that its best to find a shop that knows how to set them up on a dyno and have them fine tuned


    thinking about it don't send them to me , the one I have is used as a door stop and I'm running out of doors I need to keep open
    Last edited by hrcollinsjr; 04-19-2010 at 08:02 PM. Reason: Cause it's Baz!
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    1000 Post Club Site Supporter My location P.J. Romano will become famous soon enough P.J. Romano's Avatar
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    Quote Originally Posted by dragonswar84 View Post
    Hello all,
    I just purchased a dual side draft webber carb setup fpr my 70' gt on ebay. It arrived with what looks like all the parts needed to do the deed but no instructions. This setup is from cannon I think. Does anyone out there know where I can find som instructions? Thank you all
    I have a lot of good material on this subject but before I send it, please inform:
    - Is it a single side draft carburetor or dual (2) side draft carburetors set-up?
    - Which model? I assume DCOE.

    Quote Originally Posted by wrench459 View Post
    The DCOE's really needs a expert to set them up properly.
    Agree.

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    '72 Opel GT (Sara) My location newman27 is on a distinguished road newman27's Avatar
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    Sweet!

    If you do get it all working please post photos - dual side draft carbs is one of the sweetest looking things you can add to a GT engine IMHO.
    '72 Opel GT (Fireglow Orange) "Sara"

    Major Mods: Weber Carb, High Compression Pistons, Electronic Ignition, Custom CAI, Sprint Manifold,
    Enhanced Suspension (Anti-Sway Bars / Koni Reds / Sport Springs), "Big" Brake Package with 22mm Booster / MC, XM Radio

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    Other Cars:
    '09 Pontiac G8 GT (Panther Black) "Jet"
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    Cunning Linguist Site Supporter My location tekenaar will become famous soon enough tekenaar's Avatar
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    Red face Thread title says . . .

    Quote Originally Posted by P.J. Romano View Post
    I have a lot of good material on this subject but before I send it, please inform:
    - Is it a single side draft carburetor or dual (2) side draft carburetors set-up?
    - Which model? I assume DCOE.


    Agree.
    . . . and I quote "Dual Sidedraft Carb Set up" . . .


    1960: '61 Rekord PII 1.7 3S 3.9 '69 Kadett LS 'sprint' 1.9 3A 3.18
    1970: '70 GT 1.9 4S 3.44 '72 GT 2.2SSD 5S 3.44 '72 GT 2.4FI 5S 3.44P
    1970: '73 GT 1.9FI 4S 3.44 '75 1900 1.9FI 4S 3.44
    1980: '85 Bitter SC 3.9FI 5S 3.44P
    2000: '09 Solstice GXP Coupe 2.0 SIDI VVT "Stage 2" Turbo 5S 3.73P


    "De inimico non tantum loquaris male, sed cogites."

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    1000 Post Club Site Supporter My location P.J. Romano will become famous soon enough P.J. Romano's Avatar
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    Quote Originally Posted by tekenaar View Post
    . . . and I quote "Dual Sidedraft Carb Set up" . . .
    Otto, they are all DUAL (double barrel). I wanted to clarify if it is one (1) or two (2) dual carbs. It is the matter of wording.
    Attached Images
    Last edited by P.J. Romano; 04-19-2010 at 10:19 AM.

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    Cunning Linguist Site Supporter My location tekenaar will become famous soon enough tekenaar's Avatar
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    Question

    Quote Originally Posted by P.J. Romano View Post
    Otto, they are all DUAL (double barrel). I wanted to clarify if it is one (1) or two (2) dual carbs. It is the matter of wording.
    That is indeed what the general 'side-draft' consensus is, all two-barrels! This is not strictly true, of course, witness the single-barrel side-drafts by Carter ('53/4 Vettes and '60s Corvair Turbos) and all the SUs used in most '40/'50/'60/'70s Brit cars and Japanese copies, '60s Datsun Roadsters and '70s 240Zs come to mind.

    So, not to put too fine a point on it, P.J., but it's this very assumption that makes it somewhat moot, IMO. I mean, have you ever heard anyone ask about a dual 'dual sidedraft' carb setup? I certainly haven't . . . it's automatically assumed to be a dual two-barrel sidedraft carb setup that's being discussed, no?


    1960: '61 Rekord PII 1.7 3S 3.9 '69 Kadett LS 'sprint' 1.9 3A 3.18
    1970: '70 GT 1.9 4S 3.44 '72 GT 2.2SSD 5S 3.44 '72 GT 2.4FI 5S 3.44P
    1970: '73 GT 1.9FI 4S 3.44 '75 1900 1.9FI 4S 3.44
    1980: '85 Bitter SC 3.9FI 5S 3.44P
    2000: '09 Solstice GXP Coupe 2.0 SIDI VVT "Stage 2" Turbo 5S 3.73P


    "De inimico non tantum loquaris male, sed cogites."

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    naught corner for the 2 of you
    Copyright 2003-2012 barry williams
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    Cunning Linguist Site Supporter My location tekenaar will become famous soon enough tekenaar's Avatar
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    Quote Originally Posted by baz View Post


    naught corner for the 2 of you
    . . . it all comes to naught I guess!


    1960: '61 Rekord PII 1.7 3S 3.9 '69 Kadett LS 'sprint' 1.9 3A 3.18
    1970: '70 GT 1.9 4S 3.44 '72 GT 2.2SSD 5S 3.44 '72 GT 2.4FI 5S 3.44P
    1970: '73 GT 1.9FI 4S 3.44 '75 1900 1.9FI 4S 3.44
    1980: '85 Bitter SC 3.9FI 5S 3.44P
    2000: '09 Solstice GXP Coupe 2.0 SIDI VVT "Stage 2" Turbo 5S 3.73P


    "De inimico non tantum loquaris male, sed cogites."

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    1000 Post Club Site Supporter My location P.J. Romano will become famous soon enough P.J. Romano's Avatar
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    Quote Originally Posted by baz View Post
    naught corner for the 2 of you
    IT IS ALL OTTO'S FAULT!!


    Back to the thread now:
    Quote Originally Posted by dragonswar84 View Post
    Hello all,
    I just purchased a dual side draft Weber carb setup fpr my '70 gt on ebay. It arrived with what looks like all the parts needed to do the deed but no instructions. This setup is from cannon I think. Does anyone out there know where I can find some instructions? Thank you all
    This http://www.webcon.co.uk/weber/40dcoe.htm link will give you general understanding of Weber DCOE carburetor.
    I have also attached the article that I saved from some Internet site years ago on jetting of Weber carburetors (hope it is not copyrighted). The article that I attached will give you general direction but unless you are very lucky, count on many try and fail attempts.
    You should also check several articles in this Forum.
    Your best bet would be to install the carburetors and to find out if they have street or competition set-up, are there any flat spots, etc. This will determine your further jetting steps. After playing with Weber DCOE carburetors for the last (AHEM) 40 years, I can confirm that almost each car has its own "sweet spot" set-up. I collected quite a number of jets, venturi tubes and emulsion tubes as a result of various attempts to find setting for my GT that will be to my liking.
    Finally, I have attached the file showing various settings that worked for me or for other members of this forum. You might still have to find your own, different setting.
    Attached Images
    Attached Files
    m610 likes this.

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    First Time Opeler dragonswar84 is on a distinguished road
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    Ok to clarify...

    I have a dual 2 barrel weber DCOE 40 carb setup with cannon manifolds....Real Italian Webers too. That being said...I appreciate all the info on how to tune them....but I need to know how to Install them. Does any one have this info? If you do please let me know. Thanks all of you for your help.

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    Just an old fart My location wrench459 will become famous soon enough wrench459's Avatar
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    Quote Originally Posted by dragonswar84 View Post
    That being said...I appreciate all the info on how to tune them....but I need to know how to Install them. Does any one have this info?
    Ok Daniel
    Maybe its time for you to upload a picture of everything that you have. That could/would help out tremendously.
    What do ya'll think start from the beginning?
    Understand that the mounting is just the tip of the iceberg.
    Last edited by wrench459; 04-19-2010 at 10:02 PM.
    Black Horse

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    New/Old Owner 1973 GT My location JimVonBaden is on a distinguished road JimVonBaden's Avatar
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    Daniel,

    I live in Vienna, VA. I might be able to assist in the installation. The tuning, however, is probably beyond me. I can get it running, and close enough to drive, but that would be it.

    Jim

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    Quote Originally Posted by dragonswar84 View Post
    Hello all,
    I just purchased a dual side draft Weber carb setup fpr my '70 gt on ebay. It arrived with what looks like all the parts needed to do the deed but no instructions. This setup is from cannon I think. Does anyone out there know where I can find some instructions? Thank you all
    Not too hard to setup but I would recommend a good Weber book

    basically what you're going to do is check to see if the carbs need to be rebuilt
    check the size (write down) of all the components
    set the floats
    bolt the manifolds onto a dummy head (if you have one) so you can check and see if all the butterflies open at the same time

    pretty logical and straight forward

    the Weber book will give recommended venturi size and aux venturi

    basically your going to check out the carbs and then just try them

    good luck


    Davegt27
    Last edited by tekenaar; 04-20-2010 at 01:14 PM. Reason: to hard, where to? ;-); your - possessive

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    Just an old fart My location wrench459 will become famous soon enough wrench459's Avatar
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    Quote Originally Posted by davegt27 View Post
    ... so you can check and see if all the butterflies open at the same time

    good luck


    Davegt27
    Hey Dave
    Glad to have you on board in this discussion.
    One of the special tools which can speed things up a tad is a unisync.
    From my experience thats the one thing that's always off.
    Black Horse

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    Quote Originally Posted by wrench459 View Post
    Hey Dave
    Glad to have you on board in this discussion.
    One of the special tools which can speed things up a tad is a unisync.
    From my experience thats the one thing that's always off.
    dont use a unisync they work like crap

    http://www.thesamba.com/vw/classifie....php?id=554213

    get a "Flow Meter, -Synchrometer, Carburetors"

    http://www.englishparts.com/products...4/375-321.html

    good luck
    Davegt27

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    Just an old fart My location wrench459 will become famous soon enough wrench459's Avatar
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    Quote Originally Posted by davegt27 View Post
    dont use a unisync they work like crap

    http://www.thesamba.com/vw/classifie....php?id=554213

    get a "Flow Meter, -Synchrometer, Carburetors"

    http://www.englishparts.com/products...4/375-321.html

    good luck
    Davegt27
    LOL a manometer is just a thing.
    Can they measure the air density,moisture and temp?

    How does this relate to the post?
    I've seem A/F rock from 13:1 at 70 F to over 14:1 at 40 F
    Last edited by wrench459; 04-20-2010 at 12:18 AM.
    Black Horse

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    No....its not a Buick.... My location yellaopelgt is on a distinguished road yellaopelgt's Avatar
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    If memory serves me, I do believe the Cannons do have the best flow. But...they are longer than the Irmschers. Therefore, some major surgery of the heater core box is in order.
    There is also a post somewhere with a link to making your own manometer using stuff you can get at a hardware store. While I do agree that a dyno would be in order to fine tune the carbs, the manometer is just used to balance them for a starting point.
    And Ummm... Baz... if you have a set of intakes sitting around being used as a doorstop, you could always send them to me.....I'd gladly support your next fishing trip!
    joe
    What ...we got here...is........failure......................... to communicate....
    Some men,you just cant reach...so you get what we had here last week...which is the way he wants it.
    Well, he gets it...I dont like it, any more than you men...


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    New/Old Owner 1973 GT My location JimVonBaden is on a distinguished road JimVonBaden's Avatar
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    http://obairlann.net/reaper/motorcycle/manometer.html

    We use them on BMW bikes all the time!

    manometer.png

    Personally I like the Twinmax. It is less messy and easier to use:

    http://www.aerostich.com/twinmax-synchronizer.html

    4543_2a_2.jpg

    As said though, for this it is just a solid starting point, but you can get them close enough to drive with.

    Jim

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