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Old 05-05-2021, 12:23 AM   #1
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Default Edelbrock 1409 Tuning

New carbs on both mains 5.0L B2
Out of the box, they are very slow out of the hole until the secondaries kick in around 3200 rpm. Iím also getting surging at around 1800 of about 50-75 rpm.
Any tidbits on tuning these carbs to address the issues?
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Old 05-05-2021, 12:00 PM   #2
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John - this is interesting as you're the first person I've heard of having issues with these carbs out of the box. Have you checked for a vacuum leak between the carb and intake? Being that their new I would contact Edelbrock and discuss this with them.
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Old 05-05-2021, 06:10 PM   #3
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Iíll recheck. That was my first check.

I went the Edelbrock route because of the rave reviews. I will say the kick is impressive when the secondaries open. Anyone know what the primaries alone flow? Iím suspecting that the air valve isnít opening soon enough to feel the engine at lower rpm.

That was one good thing about the 2bbls. No secondary lag.


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Old 05-09-2021, 04:00 PM   #4
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Any updates?
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