Thread: 3 dueces

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OK, first take a methodical approach, to insure that it's not a non-carburetor related issue. A couple of things to check first are:

The mechanical advance is working and your getting around 32 degrees or so total advance at around 22-2400RPM.

You do not have any vacuumed leaks.

The end carbs are getting fuel.

Unless you are running all three carbs synchronized (all three always opening the same amount at the same time) using the sync tube is a waste of time. If the manifold is running 3 3 bolt Stromberg carbs you may find you do want to run them synced due to their low CFM rating, but it sounds like you want them progressive.

DO NOT DISABLE THE END CARB ACCELERATOR PUMPS (this gets real ugly with an instant extremely lean condition usually followed by a major back fire (and sometime fire) through the carbs.)

Usually it's difficult to get a decent idle with the end carbs having idle circuits. If you've got it to idle decent you may not want to make any idle circuit changes. I cover how to modify the carbs to delete the idle circuits in a couple of the posts below along with building linkage. You do not need to spend $350.

If you problem stems from the end carbs being too rich, you MAY need to disable the power valve, again a simple procedure that's cover in the posts listed.

There is also a possibility that your linkage set up is not opening the end carbs enough and may need some fine tuning.

Let us know what carbs your running and what size the engine is and what mods have been made to it.

Check the posts below it should give you a fair amount of info on carb mods, sizes linkage etc.

http://www.clubhotrod.com/forums/sho...threadid=13948 (Page 2 covers Carb Mods)

http://www.clubhotrod.com/forums/sho...threadid=12288

http://www.clubhotrod.com/forums/sho...&threadid=9262

http://www.clubhotrod.com/forums/sho...&threadid=7704

http://www.clubhotrod.com/forums/sho...&threadid=7436


The pictures of the linkage I posted previously apparently went away when the site crashed a while back.

This is the linkage on my stroker ford FE