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Old 10-24-2012, 12:07 PM
Nortonfan Nortonfan is offline
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Quadrajet tuning '67-'69 Firebird Sprint

Hello to all,

My first post here and hope I don't get anyone upset with my questions.

I would like to 'convert' or tune a quadrajet carburetor (yet to be acquired) to match the specifications of the ones that orginally came on the six cylinder models of the Pontiac Firebird Sprint, say, between '67 - '69. I have searched unsuccessfully for information on jetting, metering rods, etc, though I have found the applicable model numbers for these carbs., which are practically unobtainable and, if available, way beyond my stash of cash on hand for this project. And, yes, I have considered Holley, Autolite, Weber, Carter and Edelbrock. I have no prejudice or inclination for or against any of these; however, I do favor the Quadrajet on account of its inherent tuneability and proven performance, gas economy and reliability, once properly set up. Not to mention cheap!!! Which is where my finances allow me to hang out. Not a sob story, just dealing with facts here.

I realize there is more to tuning these carbs beyond float levels, jet and needle replacements ... and lots of patience! But, I have considered the alternatives and would only opt to switch if completely discouraged in finding the information I need.

The carb part/model numbers I have found pertinent to the Pontiacs in question are: 7027268, 7027260, 7028260, 7028261, 7029260 and 7029261. I believe these are all 750 CFM. I understand that some of the earlyer versions of these carbs for this specific application, were equipped from the manufacturer with parts that are no longer available. The numbers listed, however, are of the later versions.

Your valuable comments and suggestions are much appreciated!

Cheers,
Norman C
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