Thread: Multiple carb tuning (don't run away! lol)

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Think of a "progressive" Rochester 3x2 set up is nothing more than a "Two Barrel" (with secondaries, LOL) as far a tuning is concerned. The end carbs (the secondaries) are completly closed at idle with no idle air adjustments, or idle fuel flow. Tune the center carb first, confirm that you have no air flow in the secondaries (linkage adjustment) and tune away just like normal. After your satisfied with the low end, then start jetting the secondaries just like on a four barrel carb. It's no big deal, just looks a little different.

ah, ok i see now. Thanks Dave and John! What is the CFM on the center carb? How about the CFM when they are all open? I heard that if you want to run in the 11s in the 1/4 the Rochesters won't cut it. Is that true?

-CJP