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Old 09-07-2014, 05:07 PM
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Join Date: May 2006
Location: Portland, OR
Cobra Make, Engine: ERA FIA, 1964 289->Webers
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I've attached an example of the weber jetting survey I did a while back. Every engine has different needs so, nothing is set in stone. Two things are pretty certain, when you have your idle circuit sorted out. It'll idle w/o smelling rich & setting the main circuit will be a lot easier. Obviously, the best method for doing all of this is is with an A/F bung on each header pipe. I didn't/don't use this method & it's been a long process.
From what I read, popping out the pipes means too rich. Out of the carbs, too lean.
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ERA FIA 2088

Last edited by *13*; 09-07-2014 at 05:12 PM..
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