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Old 07-13-2004, 05:25   #1 (permalink)
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roll 4BBL or 2BBL?

I have a 6 cyl manual 64 1/2 Mustang and am looking for a V8. In ads I see 4BBL and 2BBL. What does that mean? Which is better and why? Thanks. npomerleau@comcast.net
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Old 07-13-2004, 07:22   #2 (permalink)
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Re: 4BBL or 2BBL?

It's the type of carburetor, 2bbl is gas saving for a V-8, the 4bbl will give you more hp but less fuel saving. Car companies used carburetor's before fuel injection became the norm.
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Old 07-13-2004, 07:42   #3 (permalink)
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Re: 4BBL or 2BBL?

i actuall had a 64 1/2 Mustang convertable a few years ago & it was a "D" Code, first factory 4 barrel with a 4 spd trans

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Old 07-14-2004, 00:27   #4 (permalink)
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Re: 4BBL or 2BBL?

The 4bbl with give you the most performance if that is what you want, though normally the engine would be a little more expensive to purchase than the 2bbl. As Stacy has posted ,it is the carb difference but this also means a different intake manifold and sometimes camshaft profile and on certain engines valve size's are different too.
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