what 2bbl to use on a 6 cylinder
i have a 223 that will have a header and a clifford 4bbl intake. i want to use a 2bbl carb and an adapter plate. what would be a good carb for the job? ive been looking at 2100s, autolites, and rochesters. what do yall think?
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Some would call it blasphemy, but I think you can't hardly go wrong with a Rochester 2GC. Plentiful, cheap, dependable and efficient. About a billion in the junkyards that nobody wants. $15 kit and you're good to go for about 10 years....
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The Rochester 2GC is a good choice, but I've always prefered the Holley over all others.
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I used a Holley 500 on my 86 300. Works great, truck runs like a beast!
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I use a Holley 2300 (350 cfm) 2bbl on my 84 300, more power and easier on fuel than the 1bbl.
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why not just use a 4 bbl carb?
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its a totally stock 223. i dont know if it could handle a 4bbl in its current condition.
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oh ok i see ur point
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Originally Posted by crm318
its a totally stock 223. i dont know if it could handle a 4bbl in its current condition.
One possible choice would be the same old Holley 390 CFM carb that so many folks use on their Ford 300's. You might need to make some tuning changes to it to get the best combination of performance and fuel economy, but Holley carbs are pretty common so tuning parts and expertise with them are fairly easy to come by. On the other hand one of the garden variety 2 barrel carbs like any of the models others here have suggested could also work quite well, assuming it was properly tuned to work well with your particular engine. (Note that at least some amount of carb tuning and set up is likely to be needed no matter what kind of carb you use.) One unorthodow suggestion I could toss into the mix would be a Quadra-Jet carb. (I can almost hear the shrieks of "BLASPHEMY!" as I write this. :) ) The Quadra-Jet carbs have the advantage of having very small primaries. That means that your engine could get fuel economy and low-end throttle response of the sort it would get when using a small two barrel carb, but would have plenty of 4 barrel "oomph" when you stomped on the gas because the secondaries would open as needed to increase the amount of air flowing into the engine. :) As with any carb you'd need to get it tuned to work with your specific application, but that shouldn't be too difficult. Q-Jets may be less common than Holleys, but they still have a sizable following. Click HERE to see an article that discusses Quadra-Jet carbs. HERE'S a link to another article about them. |
One unorthodow suggestion I could toss into the mix would be a Quadra-Jet carb.
Any intakes that take the spread-bore and fit the 240-300? |
Originally Posted by Red2003XLT
Any intakes that take the spread-bore and fit the 240-300?
By the way, Quadra-Jets have a reputation for being able to operate properly at far more extreme angles than Holley carbs, which makes them a good choice for trucks that will be used offroad. :) |
I found another useful link to a web page with a lot of links to web pages full of various kinds of info about Quadra-Jet carbs. Some of the links on the page have expired, but a lot of them do still work.
Quadra-Jet carb links page Also, you may recall that I mentioned that Quadra-Jet carbs have really small primaries, and I found an image that illustrates this fact pretty well. It's a picture of a stripped down throttle body plate from the bottom of a Quadra-Jet carb and you can really see how small the primaries are compared to the secondaries in this image. For reference, the two smaller round holes at the top are the primaries, and the two larger round holes directly below them and partially covered by the jaws of the vise are the secondaries. Here's the link to that image: Quadra-Jet throttle body plate in a vise That image is from an article on the Car Craft web site. Here's a link to that article. Quadra-Jet :) |
Originally Posted by Pkupman82
I use a Holley 2300 (350 cfm) 2bbl on my 84 300, more power and easier on fuel than the 1bbl.
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Originally Posted by N7ghtwolf
Would a 2bbl really be easier on fuel than a 1bbl or a 4bbl?
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adapter plate
which adapter plate should I use to put a two barrel holley 500 on a 300 6 cyl. summit and trans adpt offera couple different sizes
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