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1973 Mustang 2 bbl to 4 bbl

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Old 07-24-2016, 06:07 AM
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bailer01
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Default 1973 Mustang 2 bbl to 4 bbl

Recently I converted my 351 Cleveland from a 2 bbl to 4 bbl Edelbrock 1405. It starts and runs at idle perfectly. revs fine, but when I drive it, it feels sluggish and miss fires sometimes. Is there anything else I should change or upgrade on the engine? I do plan on adding headers this August.

Last edited by bailer01; 07-24-2016 at 06:09 AM.
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Old 07-24-2016, 09:37 AM
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69mach1377
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You changed the intake also, right?
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Old 07-24-2016, 10:16 AM
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bailer01
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Correct
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Old 07-25-2016, 09:25 AM
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69mach1377
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Tuning a new carb can take time and patience. How many cfm is it?
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Old 07-26-2016, 01:23 PM
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movielover40
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Was the carb new or used?
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Old 07-26-2016, 09:45 PM
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jimkaray
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You used the 4 bbl intake for the 2V heads correct?
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Old 07-27-2016, 10:00 AM
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69mach1377
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This 20 questions is getting old OP, tell us some details so we can help...
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Old 07-28-2016, 08:10 AM
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bailer01
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Sorry for the delay, traveling for work.

Yes, purchased a new carb and intake for the 2V setup. Installed and hooked up all the vacuum lines. I have not changed much else. I am a little tone deaf (can't tune a guitar for the life of me), so when I try to adjust the idle screws like they show on edelbrock until the rpm's go down, I do not hear that. In fact i hear no change at all. Could that mean something? Am I missing something?
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Old 07-28-2016, 09:26 AM
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Chromeshadow
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You might want to get a good tach, or have someone in the drivers seat watch the dash for you.
Or put a camera in there that you can see while tuning. Hmm Tach selfies?
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Old 07-28-2016, 10:09 AM
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69mach1377
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Get a vacuum gage...and advance your timing to just below pinging.
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