Author Topic: Strange looking Six Pack Carb linkage  (Read 433 times)

Offline ed-pv

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Strange looking Six Pack Carb linkage
« on: July 13, 2017 - 10:25:32 pm »
I purchased this 340 six pack setup recently and have never seen this throttle linkage before.  Can anyone identify?




Online cudabob496

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72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.
Up to 4000 RPM, Warp Speed, Up to 5000, Rediculous Speed, Up to 6000 RPM, Ludicrous Speed!

1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"

Offline ed-pv

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Offline tman

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Re: Strange looking Six Pack Carb linkage
« Reply #3 on: July 14, 2017 - 11:36:42 am »
Link worked for me.  They are Edelbrock made: GM Zinc Plated Six Pack Inline Steel Linkage Rod Throttle Linkage Kit $459.  The store is VPW.com.au

Offline ed-pv

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Re: Strange looking Six Pack Carb linkage
« Reply #4 on: July 14, 2017 - 01:06:16 pm »
Got it!  THANKS!  Link worked, I must have clicked it when they were doing maintenance on their server.

Offline ed-pv

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Re: Strange looking Six Pack Carb linkage
« Reply #5 on: July 14, 2017 - 02:06:52 pm »
So I guess they question is do I use this setup or go with an original style setup since this setup looks to be for mechanically actuated outboard carbs and I still have the vacuum pods?

Online cudabob496

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Re: Strange looking Six Pack Carb linkage
« Reply #6 on: July 14, 2017 - 02:55:36 pm »
would not think it would work with vacuum outboard carbs, but not 100% sure.
72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.
Up to 4000 RPM, Warp Speed, Up to 5000, Rediculous Speed, Up to 6000 RPM, Ludicrous Speed!

1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"

Online 1 Wild R/T

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Re: Strange looking Six Pack Carb linkage
« Reply #7 on: July 14, 2017 - 02:59:53 pm »
Bog city... Needs mechanical carbs with accelerator pumps...
JS27N0B 70 Challenger R/T Convertible  FJ5 Sublime, Show Poodle w/90,000 miles since resto
WS27L8G 68 Coronet R/T Convertible  PP1 Bright Red, Project
RM21H9E 69 Road Runner Coupe R4 Performance Red, Sold...
5H21C  65 Falcon 2 dr Wagon... Dog Hauler...

Offline ed-pv

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Re: Strange looking Six Pack Carb linkage
« Reply #8 on: July 14, 2017 - 05:51:55 pm »
So I was looking at the setup and it looks like the linkage was not setup to open the outboard carbs mechanically, it looks like it was just being used to ensure the outboards were closed when the throttle went to idle.  This being the case, can I use the linkage like this since the vacuum pods will open the outboards when needed?

Online cudabob496

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Re: Strange looking Six Pack Carb linkage
« Reply #9 on: July 14, 2017 - 06:00:43 pm »
would think an AFR meter is essential to make that set up work correctly
72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.
Up to 4000 RPM, Warp Speed, Up to 5000, Rediculous Speed, Up to 6000 RPM, Ludicrous Speed!

1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"

Offline ed-pv

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Re: Strange looking Six Pack Carb linkage
« Reply #10 on: September 25, 2017 - 10:03:05 pm »
I ended up rebuilding the carbs and setting them up with stock linkages.  Works GREAT!

Offline DocMel

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Re: Strange looking Six Pack Carb linkage
« Reply #11 on: September 28, 2017 - 01:47:41 pm »
I have been around mopar (sixpack/and GM tripower holleys) for a long time.  If I have learned anything, its that the reason most people that have them and they don't run right is years of hack jobs and so called rebuilds over the years by prior owners

1.  First and foremost, if I ever see mech linkage set up on a set of OEM six/tri Holleys, I walk away:  All that means to me is that an owner somewhere down the line had percieved problem with his carbs, so they changed them.  Who knows what else they changed out as well. 

2.  Even the brand spanking new six setups you see for sale are NOT put together correctly,.  The metering blocks are not correct for the 340 or the 440 setups:  Yes, they will run out of the box, but not a efficient as they could be

3. The linkages on a proper vacuum operated 6 setup have a VERY specific setup.  The steps to set up and adjust them are availalble.  Holley back in the day was very specific if a carb or carbs were removed, EVEN if your kept all the linkage adjustments the same and didn't change them,  holley stated to go thru all the linkage set up instructions again when you and reinstalled them   

4.  Years of wear, poor maintianence, and hack work made these setups run poor over the decades.  Leaking throttle shafts, clogged metering block passageways, improper float adjustments, replacing parts with the wrong parts, etc  What I mean by this is that the many parts might fit, but the part was NOT calibrated or meant for the holley 6 setups.  Even holley has cross referenced the wrong parts over the years for these 6 setups

I would recommend anyone interested in these setups:  Buy one from a QUALITY restorer that is willing to help the setup and tune once bought, OR.  Get one of the new setups, and have a partner help set up the basic tune

Remember back in the day when these units were new they ran great:  In fact the 440 six's would get the 440 hemis off the line.

As far as an AFR goes, none is really needed to get a 6 setup running, although it does help to get a spot on tune .  The middlecarb does the work until the gas pedal is pressed, and vacuum opens the outboards   

3.  Forget calling holley about six pack tuning.  They lost their tech knowledge on their 6 setups a long time ago   

Offline 734406pk

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Re: Strange looking Six Pack Carb linkage
« Reply #12 on: September 28, 2017 - 09:29:19 pm »
I have been around mopar (sixpack/and GM tripower holleys) for a long time.  If I have learned anything, its that the reason most people that have them and they don't run right is years of hack jobs and so called rebuilds over the years by prior owners

1.  First and foremost, if I ever see mech linkage set up on a set of OEM six/tri Holleys, I walk away:  All that means to me is that an owner somewhere down the line had percieved problem with his carbs, so they changed them.  Who knows what else they changed out as well. 

2.  Even the brand spanking new six setups you see for sale are NOT put together correctly,.  The metering blocks are not correct for the 340 or the 440 setups:  Yes, they will run out of the box, but not a efficient as they could be

3. The linkages on a proper vacuum operated 6 setup have a VERY specific setup.  The steps to set up and adjust them are availalble.  Holley back in the day was very specific if a carb or carbs were removed, EVEN if your kept all the linkage adjustments the same and didn't change them,  holley stated to go thru all the linkage set up instructions again when you and reinstalled them   

4.  Years of wear, poor maintianence, and hack work made these setups run poor over the decades.  Leaking throttle shafts, clogged metering block passageways, improper float adjustments, replacing parts with the wrong parts, etc  What I mean by this is that the many parts might fit, but the part was NOT calibrated or meant for the holley 6 setups.  Even holley has cross referenced the wrong parts over the years for these 6 setups

I would recommend anyone interested in these setups:  Buy one from a QUALITY restorer that is willing to help the setup and tune once bought, OR.  Get one of the new setups, and have a partner help set up the basic tune

Remember back in the day when these units were new they ran great:  In fact the 440 six's would get the 440 hemis off the line.

As far as an AFR goes, none is really needed to get a 6 setup running, although it does help to get a spot on tune .  The middlecarb does the work until the gas pedal is pressed, and vacuum opens the outboards   

3.  Forget calling holley about six pack tuning.  They lost their tech knowledge on their 6 setups a long time ago

 :iagree: 100%
1973 Challenger 440 6 pack auto 3.91 rear
2012 Dodge Ram 3500 dually 6.7 Cummins Fleece EFI Live
1973 Challenger 318 2bbl auto 2.73 rear 22.5 mpg RIP
1970 Challenger TA 340 4bbl auto-Sold and sad
1999 Dodge Ram 3500 dually 5.9 Cummins Fleece tuned VGT-sold
1995 Kawasaki ZX1100E & still alive