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What 4bbl carb?

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Old 01-05-2007, 08:49 PM
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What 4bbl carb?

I would like to put a 4 bbl carb on my flathead any suggestions as to what I should be looking for. All information will be greatly appreciated.

Bob G
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Old 01-05-2007, 09:35 PM
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A 4bbl will be a little much for a stock flathead. Taking a 239cu in out to 276 with a mild cam will run nice with a 390 cfm 4bbl.
I'm not aware of any 4bbl smaller than that.
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Old 01-05-2007, 10:31 PM
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Used to see the twin duces on em in the late 50.s and up. Pop talked about em a lot. Said they really made a 50 merc move. Manifolds and carbs gotta be out there. I realize they are a bear to keep in tune but what else a gear head got to do? Laundry?
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Old 01-06-2007, 08:43 PM
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Oops!!

I forgot to mention that I have a manifold just trying to figure out what carb I need. I'll start looking around to see what's out there. If a 390 cfm is the smallest I can get that I guess that will be what I'll be looking for.

Thanks for the info.

Bob G
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Old 01-06-2007, 08:57 PM
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Is it a custom manifold? As in a y block 54+ would have to have a 57+ stock manifold to take that carb I believe. I have ran T pots(56-) and they are a flaming torch or can be. If ya can run the 390 I would put in smallest jets and headers, bigger cam etc. and it may still fall on her face when ya punch it.
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Old 01-07-2007, 02:29 PM
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It's supposed to be an Edmonds but there is some question as to its authenticity. It measures 3 3/4 X 3 7/8 roughly for the carb base. I thought this would be a place to start. The engine has duals and I will be looking for a cam and heads in the future.

I would put a photo up here but I can't post attachments so I'll put it in my gallery.

Thanks for the info..

Bob G
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Old 05-25-2007, 01:24 PM
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Carb question

If you use the Holley 390, its not a direct bolt up to the Edelbrock Manifold. There's a spacer/adapter that goes in between. Speedway and others sell it.
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