Six Pack issues and rebuilding

[tommyg29]

A good article on setting six packs. Long and a little confusing but a good place to start for jetting.


http://www.moparts.org/Tech/Archive/fuel/7.html

Nice read, thank you.
Have to say with all the reading I have been doing the last week I know 10 times more about six pack carb tuning than before.

One thing Im not planning on doing is replacing my vacuum pod diaphragms. They seem to be working and it looks like they are an easy replacement with the carbs on the car if I decide or need to do them later.

[HP_Cuda]

It looks like you are on the right track. If your vacuum diaphrams will hold under suction no need to replace them.

Pretty big difference in jets eh? A good starting point for idle mixture screws is quite a bit different from what I'm used to with that article but you can put a vacuum guage and keep backing them out till you get the highest reading.

[cuda346pk]

The fuel bowls for the 6 pack are unique , I always had to order them direct from Holley or you can swap with the rear carb to hide the dent , the lower # carb goes to the front BTW

This is a 6 pack carb. It was on mine when I got it. I replaced it when I found a crack at throttle shaft. But if the dent isn't bad enough to cause a problem, swapping it to the rear works too.

[tommyg29]

I had to break the black foam float to get it out. The dented bowl pinched the slot for the float hinge pin just enough to crimp it in. It also seemed to operate stiffly, so I had to file the slot and then order another float.

[jimynick]

Is that a false economy Tommy? Having filled your engine once, do you really want to give that float bowl a second chance? Why not take advantage of the gentleman's offer of his non-dented used one and sleep better at night? Just my  and the desire to not see you wreck an expensive engine. 

[tman]

Yes, that front bowl got to go..............................

[HP_Cuda]

It's up to Tommy but if it operates normally now I don't see a problem. Maybe he wants to keep the # parts together.

The one main reason I would change out that bowl if you had leakage problems because of the deformation causing it to leak at the gaskets.

[tman]

Deformation could have caused the float to operate incorrectly since he had a hell of time removing the float.

[HP_Cuda]

Let's see what Tommy says after he mounts the new float bowl eh?

 

Deformation could have caused the float to operate incorrectly since he had a hell of time removing the float.

[tommyg29]

I really think the bowl will operate fine. The dent wont affect the gasket seal to the body, and it only needed a light filing and seems to operate freely now. Besides, I do want to keep my "original" things together if possible.
Thanks very much for the offer though David. I forgot to mention that before. 

[tommyg29]

I have taken David up on his offer of a replacement float bowl.
Seems not only is there now an invisible crack somewhere near that dent, but that ouboard carb is STILL pouring fuel down the throat. I dont understand it. The float operates freely and the new inlet valve SEEMS to operate properly.
I have pulled and dismantled that float bowl again (which I now have on the rear) and I guess its just replacement time.

Thanks David 

and boy, getting those oem type fuel lines to line up PERFECTLY and NOT LEAK. Thats been a learning experience. That, and waiting for all the different rebuild parts to arrive from different sources all over the country. 

[swede-cuda]

 

I have taken David up on his offer of a replacement float bowl.
Seems not only is there now an invisible crack somewhere near that dent, but that ouboard carb is STILL pouring fuel down the throat. I dont understand it. The float operates freely and the new inlet valve SEEMS to operate properly.
I have pulled and dismantled that float bowl again (which I now have on the rear) and I guess its just replacement time.

Thanks David 

and boy, getting those oem type fuel lines to line up PERFECTLY and NOT LEAK. Thats been a learning experience. That, and waiting for all the different rebuild parts to arrive from different sources all over the country.                                                                                                                                                                                                                    :wave:hej. in the pics it looks like theres a brass plug in the meteringblock? instead of powervalve. just to keep you alert.

[tommyg29]

 

After very closely examining the bowl, I think its possible there is a leak between the fuel inlet (the cylinder the bronze filter sits in) and the bowl, circumventing the inlet valve. There is only a couple millimeters of material there and it wouldnt take much to cause a leak through, even under only 5-6 pounds pressure. And, it could be right in the area I filed on in that slot 
Is the bowl made of aluminum alloy, with maybe zinc? Thats what can corrode. I have a little gray corrosion in a couple spots here and there.
Seen the 71 outboards "new" for as little as about $399. May eventually have to go that route, but hopefully not too soon.
I have other things I would rather be spending my money on, like a 5 speed and a digital classic am-fm radio!
You know. Important things!!

[Chryco Psycho]

you could fill a crack with epoxy like JB weld

[tman]

CP does have a solution there, but I think just get rid of the damaged bowl and replace it.  Looks like you have one coming in that will more than likely solve the problem.