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Thread: choosing jets for weber on 4K

  1. #1
    i 8 a p00 Carport Converter rob's Avatar
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    Default choosing jets for weber on 4K

    ive been asking this in the KE corolla thread and thought id put it out there

    i have a 4K (3k head, 4k bottom) with stock cam and a 32/36 DGV weber to play with

    there is not much suggestion on what jets to run on the net and was looking for some advice from anyone who's set up a weber on a toyota engine

    ive taken out all the jets at the moment it has

    primary main jet = 127, aircorrector = 115, emulsion tube = F66, idle jet = 55
    secondary main = 125, aircorrector = 160, emulsion tube = ???, idle jet = 60

    (??? means there was no markings on it)

    now i think the air correctors are in backwards, am i correct?

    from research everything else is fine but i was gonna get a 150, 140, 135 and work my way down with the primary and 125 seems fine for secondary.

    any suggestions on what would be the best jet sizes to use?

    thanks
    - ma61 + 2jz-gte + v160 + 3.5 torsen

  2. #2
    Junior Member Too Much Toyota oldcorollas's Avatar
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    Default Re: choosing jets for weber on 4K

    you have 26/27 chokes, so you might need bigger main
    i had 150/150 in 24/27 34DMS... but i thin kthe idle circuit was not so could, so if yours is woring a smaller main would be ok...

    bigger for sec... corrector is secondary... get the idle, then the main,, then.. there are guides out there
    "I'm a Teaspoon, not a mechanic"
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  3. #3
    Resto Rodder Domestic Engineer GA61XX's Avatar
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    Default Re: choosing jets for weber on 4K

    i have 2 x weber book's ....
    You say it's a 4K... Q:- what it's cc.. ?? 1600, 1800, 2L..?
    i will look it up & posr jets best suited..
    Project: '82, GA61 XX

  4. #4
    now with 7m powaz Automotive Encyclopaedia hosking1991's Avatar
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    Default Re: choosing jets for weber on 4K

    ga61 they are a 1.3 (1290 cc)

  5. #5
    Resto Rodder Domestic Engineer GA61XX's Avatar
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    Default Re: choosing jets for weber on 4K

    these jets on a 1300
    primary main jet = 125, aircorrector = 180, emulsion tube = F50, idle jet = 55
    secondary main = 130, aircorrector = 195, emulsion tube = F66, idle jet = 50

    these jets on a 1600...
    primary main jet = 140, aircorrector = 165, emulsion tube = F50, idle jet = 55
    secondary main = 135, aircorrector = 160, emulsion tube = F6, idle jet = 50

    try these...
    Project: '82, GA61 XX

  6. #6
    i 8 a p00 Carport Converter rob's Avatar
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    Default Re: choosing jets for weber on 4K

    thanks guys +rep

    EDIT: You must spread some Reputation around before giving it to hosking1991 again.

    ill get u next time bro
    Last edited by rob; 29-10-2007 at 04:29 PM.
    - ma61 + 2jz-gte + v160 + 3.5 torsen

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