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Rochester 2gc Jets

Discussion in 'Early CJ-5 and CJ-6 Tech' started by juffer, Jun 26, 2019.

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  1. Jun 26, 2019
    juffer

    juffer Juffer Sponsor 2019 Sponsor

    Netherlands
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    Hi, does anyone knows where I can buy new jets for my carburator? I like to adjust it a little.

    And another question is; What is the effect of adjusting the float level higher or lower in the carb.

    Thanks

    Juffer
     
    Last edited: Jun 26, 2019
  2. Jun 26, 2019
    OzFin

    OzFin Vintage Jeep Guy

    Michigan
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    Try Mikes Carburetor
    Rochester Main Jet

    The following statement is over simplified, but...
    Higher float, as in more fuel in bowl= richer
    Lower float, as in less fuel in bowl= leaner
     
    Last edited: Jun 26, 2019
    mike starck and FinoCJ like this.
  3. Jun 27, 2019
    juffer

    juffer Juffer Sponsor 2019 Sponsor

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    Thank you.
     
  4. Jul 1, 2019
    juffer

    juffer Juffer Sponsor 2019 Sponsor

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    Is my thinking wrong as I say that floatlevel( besides the accelertion pump) is for the acceleration. As with low level the car starts hassititing when I accelerate and overflows with a high level.

    My "small"problem is that at any level the carb /exhaust is stinking gazoline. And I thing it can be solved with smaller jets and not with changing floatlevel.

    Any suggestions?

    Thanks

    Juffer
     
  5. Jul 1, 2019
    timgr

    timgr Jeepin' Nerd Sponsor 2019 Sponsor

    Medford Mass USA
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    Higher or lower float level changes the air-fuel mixture, all other factors unchanged. Higher float level increases the static pressure at the jets and delivers more fuel under all conditions. Jet size has the same effect, but the change due to float level is smaller compared to a jet size change.

    When you open the throttle (acceleration), the mixture gets leaner and that makes hesitation or stalling more likely. The accelerator pump overcomes this mechanically, with a shot of fuel. Float level is only part of this equation.
     
  6. Jul 1, 2019
    juffer

    juffer Juffer Sponsor 2019 Sponsor

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    Thank you , now I understand the effect of different floatlevels. ( change in the static pressure.) I live at sealevel, and 50 is the number of the jets. Should be good, but try a little smaller to experiment

    When straighten the accelerator pump lever, does it give more? or should I bend it

    regards Juffer
     
    Last edited: Jul 1, 2019
  7. Jul 1, 2019
    timgr

    timgr Jeepin' Nerd Sponsor 2019 Sponsor

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    You may be able to go to smaller jets with a bit larger accelerator pump shot. This would make the steady-speed mixture leaner, and possibly overcome any hesitation when you open the throttle. Sorry, I don't know enough about the 2Gc to comment on the lever adjustment.
     
  8. Jul 1, 2019
    FinoCJ

    FinoCJ 1970 CJ5 Staff Member Sponsor

    Denver, CO
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    Chat with Mike from Mike's car about the accelerator pump...when I rebuilt my 2g, I got my rebuilt kit from him but I didn't have the original tag with ID number. So he called me specifically to ask about which a-pump I would need. He had me go out and take a couple measurements off the carb to confirm...said a lot of rebuild kits (and thus previous rebuild done by PO) may have the wrong pump. Section E-41 in the FSM talks about bending the pump rod just a bit to obtain the proper setting.
     
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  9. Jul 2, 2019
    juffer

    juffer Juffer Sponsor 2019 Sponsor

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    Yes right. I will try to bend it a bit, but like to know when I need a little more if the rod should be bent to shorten or straighten . But good advice, I will get in touch with Mike
     

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