Quote:
Originally Posted by robib
First question: Which 4100 carb do you have? Is it a 1.08 or a 1.12. One of those numbers will be cast on the left side of the front venturi. The 1.08 is the smaller of the two and is 480 CFM and the 1.12 is 600 CFM. While the 1.08 is the better choice, the 1.12 will work just fine. I have a 57 312 and use a 1.08 which runs great.
You say it runs rich. You say this because what, at idle, at cruising speed? If at idle, it could be as simple as replacing power valve.
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That is not correct that a 1.12 is equal to 600 cfm. These were small carbs. Peop0le think they were around 600, nope!