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Thread: Jetting recommendations for 2.2 E spec engine w/ Webers?

  1. 12-22-2014, 04:41 PM #1
    Noah
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    Jetting recommendations for 2.2 E spec engine w/ Webers?

    Apologies if this has been answered, but I couldn't find anything in the archives. I'm rebuilding my leaky '70 2.2T engine (which has Weber 40IDA's, not Zeniths) and plan on a really mild upgrade - S p/c's and E cams. Being that this is a pretty common upgrade, I assume (er, hope!) there are plug-and-play jetting specs for the Webers. Any recommendations appreciated.

    BTW - if anyone has alternative cam suggestions, I'm all ears. Just looking for a little more pep on the street, and not interested in going to the counterweighted E/S crank, stroking it out to 2.4, etc. Just building a modest, mostly stock street motor.
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  2. 12-23-2014, 05:28 AM #2
    xpensivewino
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    Check with PMO, he has almost all the jetting combo's needed for most spec engines. Cheers Steve
    1969 911 E #824
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  3. 12-23-2014, 07:26 AM #3
    1QuickS
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    Your Webers probably have F26 emulsion tubes. If they have F3s then the jetting is a tad different than for F26s. I assume you have IDAs and not IDTPs which are a bit different again.

    2.2E with Webers & F26 emulsion tubes:
    • 32mm main venturis
    • 145 main jets
    • F26 emulsion tubes
    • 170 air correction jets
    • 55 idle jets


    2.2E with Webers & F3 emulsion tubes:
    • 32mm main venturis
    • 140 main jets
    • F3 emulsion tubes
    • 180 air correction jets
    • 55 idle jets


    Either path should get you close.
    Paul Abbott
    Early S Member #18
    Weber service specialist
    www.PerformanceOriented.com
    info@PerformanceOriented.com
    530.520.5816
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  4. 12-23-2014, 09:26 AM #4
    Noah
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    Thank you Paul, much appreciated. These are IDA's but I don't know which emulsion tubes I have yet.
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