Quote:
Originally Posted by Eledu
When I decided to buy it I read a lot, and many said that 465cfm is adequate. I also saw that the 57´ 312ci had that carburetor originally with jets of 55 in the primaries and 48 in the secondary ones. I know my carb is not the same as that 465cfm but the 60 jets in the secondaries won't be too much and is that why this happens?
Greetings!
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A 400 to maybe 500 cfm 4 barrel carburetor with a vacuum operated secondary is not too big for a 292.
I agree, the color of the center of that spark plug indicates a 'lean' fuel /air mixture.
I may be assuming too much about your comment above but...
because of all the internal construction & operational differences, the jets in one brand and size of carburetor cannot be compared to the primary and secondary jet size in a different brand or model of carburetor.
They may be similar, but it is just as likely they are not.
A jet size that works well in one carburetor on an engine can be completely wrong in another brand or model carburetor on the same engine. The correct jetting in a particular carburetor is specific to the engine / carburetor combination and the altitude & other conditions in which the car is driven.
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