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Weber 40IDF

Discussion in 'Offroad Tech - Ask a Question any Question!' started by Gelcoater, Dec 1, 2018.

  1. Gelcoater

    Gelcoater Well-Known Member

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    I’m not a bug guy, lol.
    And I’m a bit confused?
    Buggy has a single 40 on it, car has not run since I’ve owned it.
    I’ve soaked it, cleaned it, applied the parts within a rebuid kit.
    But.
    It appears a top plate is missing?
    I have a gasket from the rebuilt kit with only one mate.
    F1CA538C-317D-4E5D-9278-598743D2D311.jpeg 7F649373-38BF-4FB5-97CB-667128149692.jpeg
     
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  2. Gelcoater

    Gelcoater Well-Known Member

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    An exploded view shows a top plate.
    Stock photos from the inter web show this carb without the top plate and short stacks.
    I would like to run a simple, effective K&N filter.

    What do I need to do or get?
     
  3. Gelcoater

    Gelcoater Well-Known Member

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    979977C1-B828-4633-A334-CF8E410E81C0.png E55F580B-FE64-4776-8FB8-EDAAB7048256.png 29356FBA-88D1-4C1A-8C62-668E68B0121D.png
     
  4. Gelcoater

    Gelcoater Well-Known Member

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    Another thing I notice, in the stock photos these two jets are elevated, where mine are well down into the body?



    37FA6A2B-273F-473D-8E11-4B1F14EFF7A8.jpeg 4B23E423-AC7A-4E64-889B-79C7E7CFDC0E.jpeg 37FA6A2B-273F-473D-8E11-4B1F14EFF7A8.jpeg 4B23E423-AC7A-4E64-889B-79C7E7CFDC0E.jpeg
     
  5. Havasu blue label

    Havasu blue label Well-Known Member

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    The jets are upgraded carb probably polished ports
     
  6. OutCole'd

    OutCole'd Raging Member

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    A8F7A41D-DF03-4729-81E4-66038CE8648B.jpeg Does look odd, here is a pic of one of my filthy 44 IDF carbs, working on installing my new air cleaner set up as we speak.
     
  7. OutCole'd

    OutCole'd Raging Member

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    My main jets look like 47-50 in your exploded view.
     
  8. Havasu blue label

    Havasu blue label Well-Known Member

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    It may be a ida version from Weber
     
  9. Gelcoater

    Gelcoater Well-Known Member

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    It’s marked IDF ?
    7F280C1D-D1BF-42A0-92B5-84D396F615D7.jpeg
     
  10. Gelcoater

    Gelcoater Well-Known Member

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    Mine do to when out of the carb.
    Can you get a pic looking down on the top?
    I see a gasket on top. Is that straight to air cleaner?
     
  11. Gelcoater

    Gelcoater Well-Known Member

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    56985F14-9A1F-46C7-B321-A7A90CC2D52C.jpeg
     
  12. wsuwrhr

    wsuwrhr The Masheenest

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    I rebuild and tune these in my sleep. Standard operation VW. :)
     
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  13. Gelcoater

    Gelcoater Well-Known Member

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    And looking closer at your pic, it appears these inlets are much taller on your carb?
    CAECF29F-DBD8-49F0-AABB-7448F50BA41B.jpeg
     
  14. wsuwrhr

    wsuwrhr The Masheenest

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    Yes.

    Some people you know make billet air cleaner housings. ;)

    ...and was the very part they started their company with. :)
     
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  15. Gelcoater

    Gelcoater Well-Known Member

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    One of those people should show me some stuff. :D
    I haven’t obtained an air cleaner or housing. Yet.
     
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  16. OutCole'd

    OutCole'd Raging Member

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    1189458F-8028-4C04-9CCD-DECEB125C313.jpeg
     
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  17. Gelcoater

    Gelcoater Well-Known Member

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  18. OutCole'd

    OutCole'd Raging Member

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    2EF7E35C-51C4-4C73-9FA7-B1B6AD6466E1.jpeg
     
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  19. wsuwrhr

    wsuwrhr The Masheenest

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    Ive never seen them with short jet stacks and Ive tuned 2 million sets.
     
  20. OutCole'd

    OutCole'd Raging Member

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    You are such an exaggerator.
     
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  21. wsuwrhr

    wsuwrhr The Masheenest

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    ac box.jpg
     
  22. wsuwrhr

    wsuwrhr The Masheenest

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    OK, ok, kinda harsh though....

    Prolly 40 cars over the years. ;)

    So, close to two million. I know my way around Dellortos and Webers.
     
    Last edited: Dec 1, 2018
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  23. wsuwrhr

    wsuwrhr The Masheenest

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    Sidedraft bottom, but you get the idea.

    ac bottom.jpg
     
  24. wsuwrhr

    wsuwrhr The Masheenest

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    Opposite side.

    SB Products got their start with this very part. <3

    ac top.jpg
     
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  25. CoolCruzin

    CoolCruzin Well-Known Member

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    My set up with Weber’s
     

    Attached Files:

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  26. UltraLucky

    UltraLucky Well-Known Member

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    Yours, does look like it was set up abit diffrent than usual with the short emulsion tubes and jet stacks. He may have been trying to fit that carb without cutting the body. I ran a single weber on my Manx and had to make a decent cut into the fiberglass to fit the air cleaner below is a pict of my carb,the top is the same as yours, just a gasket than the air cleaner base. Real important that the base seal is perfect. One grain of sand in those jets has a big effect on how they run. If you can swing it I would try to find another similar carb and short manifolds and go with duals. The power will be much smother. the single carbs with the vw ignition are a challenge to tune without an off idle flat spot.
     

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  27. Gelcoater

    Gelcoater Well-Known Member

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    I’ve been told by the old schoolers a layer of white grease between the filter and base/lid is the trick on sand.
     
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  28. Tio Pancho

    Tio Pancho Well-Known Member

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    Gelcoater I have a couple of tall K&N air filters if you are interested. See photos. I may also have the base plate for the linkage, but would need to go to my storage to look around. I have a small stash of vw parts. Let me know if there is something you are looking for. I am trying to clean house a bit.
    IMG_6611.JPG IMG_6612.JPG IMG_6613.JPG
     

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  29. Gelcoater

    Gelcoater Well-Known Member

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    I appreciate that!
    I’ve stalled a bit. Once I get the intake back on and carb on it I’ll do some measuring.
    I suspect the tall filter may be too tall to clear the body. Maybe not?
     
  30. OutCole'd

    OutCole'd Raging Member

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    If not, I hay have the standard K&N's and lids for you, I don't have the base plates though. Let me know if you need them.
     
  31. zx14

    zx14 Well-Known Member

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    Put on pre filters too
     

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