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Old 04-09-2009, 08:16 PM
71Hanker 71Hanker is offline
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k&n question

hey guys i just wanted to know if any of you have tried the carburetor substack assemblies that bolt onto the carburetor, increasing the air horn surface area. theyre made by k&n and are supposed to increas gas mileage and power but i put one on my 460 big block with an edelbrock carb and it gave me a hiway speed 1/2-3/4 throttle stumble, and the secondaries didn't want to work correctly. I took it out and the truck runs great. if its increasing airflow, should i be increasing the air/fuel mixture?
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Old 04-15-2009, 10:52 AM
Beechkid Beechkid is offline
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Originally designed by Holley in the lates 60/early 70's, they do work but with carb'd engines you did have to adjust the fuel mixture a tad with the mixture screws.
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Old 04-16-2009, 08:43 AM
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ok i'll try to mess with the a/f ratio. I think if i fatten it up a bit it might get rid of the stumble. Also i installed a Mr. Gasket adjustable inline fuel pressure regulator and i love it! The motor feels stronger at full throttle.
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Old 04-16-2009, 08:43 AM
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