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post #1 of 4 (permalink) Old 07-13-04, 04:25 AM Thread Starter
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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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post #2 of 4 (permalink) Old 07-13-04, 06:22 AM
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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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post #3 of 4 (permalink) Old 07-13-04, 06:42 AM
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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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post #4 of 4 (permalink) Old 07-13-04, 11:27 PM
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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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