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Old 08-09-2007, 01:52 PM
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6x2 bbl. carb setup

Have any of you guys (esp. old timers) ever run a 6x2 barrel setup? I was wondering how many primary/secondary carbs are typical.
Also, how does the progression (linkage) operate.....2x2's at a time, 2x2's then 4x2's?
And last, what kind of HP would be needed to handle this setup?

They ran this setup on a 57 Chevy on the "Hard Shine" program (Jimmy Shine) and it looked great and seemed to work better at top-end.

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Old 08-09-2007, 03:02 PM
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Quote:
Originally Posted by fiftyfivegasser
Have any of you guys (esp. old timers) ever run a 6x2 barrel setup? I was wondering how many primary/secondary carbs are typical.
Also, how does the progression (linkage) operate.....2x2's at a time, 2x2's then 4x2's?
And last, what kind of HP would be needed to handle this setup?

They ran this setup on a 57 Chevy on the "Hard Shine" program (Jimmy Shine) and it looked great and seemed to work better at top-end.
fiftyfivegasser can't help you much on this except to say from my 3x2 experience 6x2 will be six times the problems.
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Old 08-09-2007, 03:10 PM
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Quote:
Originally Posted by fiftyfivegasser
Have any of you guys (esp. old timers) ever run a 6x2 barrel setup? I was wondering how many primary/secondary carbs are typical.
Also, how does the progression (linkage) operate.....2x2's at a time, 2x2's then 4x2's?
And last, what kind of HP would be needed to handle this setup?

They ran this setup on a 57 Chevy on the "Hard Shine" program (Jimmy Shine) and it looked great and seemed to work better at top-end.
I had one years ago that never made it on my engine, but it did have a progressive linkage that worked as you described, with the 2 center carbs operating all of the time. The remianing 4 carbs kicked in when wide open. Mine was (sold back in early 80's) actually an edlebrock cross ram with six strombergs. I've never seen that design intake again.
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Old 08-09-2007, 03:18 PM
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Here you go..Never ran one of these but this guy knows about those..

http://victorylibrary.com/mopar/log-c.htm

Maybe it is best to run them straight up with no progression..will take a bunch of tweaking to get the jetting right and the accelerator pump shot adjusted. also sizing of the carbs will be critical as it can be easy to over do it on one of those setups..If you can weld aluminum it would make your life a bit easier as it may be difficult to find a manifold anywhere..

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Old 08-09-2007, 07:19 PM
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Even with very small carbs (Stromberg's/3 Bolt Ford) 6 on a small inch (under 400 cubic inches) will likely be way to much to set up synchronized, chances are you will want to set it up progressive. The 2 center carbs operating full time and the end carbs kicking in when the RPM is higher.

This set up is built with small base Rochesters, and it's basically set up like 2 Tri-Power setups. The end carbs have had the idle circuits and chokes deleted. I still need to take the linkage apart for some grinding and powder coating, but this should give you an idea on the inkage.
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Old 08-09-2007, 08:01 PM
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I ran trips on my 56 for years and never had a problem.

Atta boy, add more carbs

I wouldn't try to run all six without progressive on the center two.

This is a weird set I saw on ebay; the old 3 bolt carbs on 4 bolt adapters. That would set them up higher, so you could see them in the 55 Leave your hood at home And if you hit the lotto, put a 409 under them.
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Old 08-09-2007, 08:18 PM
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Quote:
Originally Posted by Not A T 25
fiftyfivegasser can't help you much on this except to say from my 3x2 experience 6x2 will be six times the problems.
What kind of problems did you have with the tripower setup? I've run them on 409/348/327 and had pretty good luck with them.
I can see some issues with trying to keep 6 carbs working in harmony, but what I thought was with only 2 primaries, that would be the extent of idle and other adjustments. Secondaries would not have adjusters, but just open for acceleration.
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Old 08-09-2007, 08:36 PM
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I ran 6 stromberg 97's on a '59 vette back in the '60's. It was a major pain really. I don't remember how I had the linkage set up, but I know it ran a lot better at highway speeds than in town.....
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Old 08-09-2007, 08:48 PM
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Quote:
Originally Posted by F&J


I ran trips on my 56 for years and never had a problem.

Atta boy, add more carbs

I wouldn't try to run all six without progressive on the center two.

This is a weird set I saw on ebay; the old 3 bolt carbs on 4 bolt adapters. That would set them up higher, so you could see them in the 55 Leave your hood at home And if you hit the lotto, put a 409 under them.
and leave the aircleaner at home too just 6 velosity stacks.
Shane
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Old 08-09-2007, 11:09 PM
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Quote:
Originally Posted by 1957plymouthhemi
Even with very small carbs (Stromberg's/3 Bolt Ford) 6 on a small inch (under 400 cubic inches) will likely be way to much to set up synchronized, chances are you will want to set it up progressive. The 2 center carbs operating full time and the end carbs kicking in when the RPM is higher.

This set up is built with small base Rochesters, and it's basically set up like 2 Tri-Power setups. The end carbs have had the idle circuits and chokes deleted. I still need to take the linkage apart for some grinding and powder coating, but this should give you an idea on the inkage.
OMG! That looks like a tuning nightmare. I'm sure you'll be able to get it to work but if that's a fresh engine build I think I'd fire it off with one carb and break the cam in right-I wouldn't expect it to run on 6-2's well out of the box. Let us know how it goes-sure looks cool.
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Old 08-10-2007, 07:29 AM
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'....OMG! That looks like a tuning nightmare. I'm sure you'll be able to get it to work but if that's a fresh engine build I think I'd fire it off with one carb and break the cam in right-I wouldn't expect it to run on 6-2's well out of the box....."

I've had a bit of experience with multiple carbs (check my journal) to include building my own carbs. Break-in should not be too big of a problem. When I break-in a fresh engine with multiple carbs I only hook fuel lines up to the primary carb(s), The carbs are first primed with an electric fuel pump to insure it fires right off (and also check to make sure I don't have that flood). I do the high Idle for 20 minuets thing, let it completly cool off, and then repeat the procedure at least twice more prior to even attempting to set the idle mixture.

The linkage for the secondary carbs is usually not connected for the first 500 miles of driving.

Haven't had a problem yet.
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Old 08-10-2007, 07:46 AM
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57 Ply; What hp engine are you running the 6x2 package on and how is the acceleration (low end vs top end).

This is the setup that I referred to that was used on the 57 Haas gasser built by Jimmy Shine.
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Old 08-10-2007, 07:52 AM
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Are you sure, they are 6x2s, I don't think there is enough space for 6x2s.
Most often they used 6 one barrel Stromberg's.
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Old 08-10-2007, 08:06 AM
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6x2s are a beautiful set up, had them on a 409, in the mid sixties. They sure do puff a flam when with a back fire, anyway can not speak to progressive linkage cause they were on a alcohol modified and all six of those babies were sucking fuel all the time. Was the closest thing to FI for the budget racer........................ That shot of the Jimmy Shine set up looks good, it sure is nice to see the updated castings and machining very nice, that is what I call eye candy. 3x2 EASY set up to tune and run, never understood the confusion.
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Old 08-10-2007, 08:17 AM
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Six 94's on homemade log intake installed on 322 Buick Nailhead. Stock engine with mild cam, straight linkage on the carbs. Ran great but really used the gas. Circa 1963.

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