68 Charger 6 pack carbs vs 4 barrel opinions please!

[John_Kunkel]

Ethanol in gas is hard on all fuel system components, look for alcohol resistant gaskets and other parts.

[Challenger340]

We've made 540/550 on pump gas, Hyd Flat Tappet Cammed 440's using a six-pak, which promptly DUMPED to 485hp with 525 Ft/Lbs once we installed the factory hp Exhaust Manifolds and oval 6 Pk Air Cleaner 

IMO, Engine/Carb Tuning on the Engine Dyno with EGT's/Lambda is a must, I dunno how anyone would do it otherwise ? just guessing IMO !

[BSB67]

The leaking diaphragm is a manufacturing QA/QC issue from Holley (or their supplier).  It leaks at the metal spring cup diaphragm penetration.

[cdr]

The leaking diaphragm is a manufacturing QA/QC issue from Holley (or their supplier).  It leaks at the metal spring cup diaphragm penetration.

I agree but I have not had that with the green ones 

[krops cars]

Sometimes it's a lot of work to be cool.

[timmycharger]

Maybe I got lucky but my six pack setup involved about as much fussing as the old 3310 holley I had on there before, pretty much none.   I had it on my 440 for 3 years before taking it off the road for restoration, made several passes at the track, drove it during the winter, to work, etc with no issues or leaks. 

almost 15 years later after the restoration was done, I took the carbs apart, looked inside, changed a float on one of them and put them right back on the intake, old blue reusable gaskets and same secondary black diaphragms I put on in 1999.  (I tested them with a vacuum pump first). 

There is a six pack tuning guide floating around several forums, I'm sure most have seen it already but it is very detailed.

https://www.forbbodiesonly.com/moparforum/threads/tuning-a-six-pack.131693/

[BSB67]

The leaking diaphragm is a manufacturing QA/QC issue from Holley (or their supplier).  It leaks at the metal spring cup diaphragm penetration.

I agree but I have not had that with the green ones 

The mew one that leaked a week ago was a green diaphragm from a Holley rebuild kit.  Don't know if it is that same diaphragm that you are describing.

[cdr]

The leaking diaphragm is a manufacturing QA/QC issue from Holley (or their supplier).  It leaks at the metal spring cup diaphragm penetration.

I agree but I have not had that with the green ones 

The mew one that leaked a week ago was a green diaphragm from a Holley rebuild kit.  Don't know if it is that same diaphragm that you are describing.

Well thats not good.