BSB67
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This. Just unplug it.
6 barrel carburetor
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This. Just unplug it.
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Every Holley fuel bowl I’ve replaced back then was because of stripped or crossed threads, fuel inlet fitting, sight hole plug, or needle and seat. Overtightening by the back yard guys seemed popular for some reason. Getting a replacement aftermarket bowl from the local speed shop was cheaper and much easier than tracking down the correct OE replacement part from a dealer. Pretty common to see aftermarket parts on OE Holleys back in the day.
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IMO...
The pix in #20's post, the center carb shown without any vent, MAY be a fuel bowl from marine application as sometimes the venting of fuel vapors, especially in a bilge, can be hazardous. And marine applications are usually different, maybe due to the engine's operating angle. The other alternative maybe the former owner (?) MAY have substituted a rear/front carb bowl because of stripped threads due to heavy hands, as mentioned. I believe the only major difference is the accelerator pump's passages...
Perhaps only the center carb has/had the vent features is because of the exhaust crossover passage providing excessive heating causing percolating.......just a thought...
BOB RENTON
The pix in #20's post, the center carb shown without any vent, MAY be a fuel bowl from marine application as sometimes the venting of fuel vapors, especially in a bilge, can be hazardous. And marine applications are usually different, maybe due to the engine's operating angle. The other alternative maybe the former owner (?) MAY have substituted a rear/front carb bowl because of stripped threads due to heavy hands, as mentioned. I believe the only major difference is the accelerator pump's passages...
Perhaps only the center carb has/had the vent features is because of the exhaust crossover passage providing excessive heating causing percolating.......just a thought...
BOB RENTON
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While the vent valveless outboard bowl may appear to support an accelerator pump, the finish machine work and the needed check valve are not present. Another major difference is the height of the sight plug, fuel level is higher on the center carb vs. outboard, see pic/post #15. Likewise, for the primary vs. secondary sight pug height on an aftermarket center-hung 4150/4160.
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YES....you are absolutely correct. The sight plug hole higher on the center carb than the end units....never paid attention to the slight difference. I run the fuel level on my GTX center carb SLIGHTLY below the sight plug opening....it delays the start of the main booster venturii slightly to avoid an over rich transition, from idle thru and including off idle transition circuit.....this is what works for me. I do not want to experiment enlarging the idle air bleeds or the emulsion tube bleeds.
BOB RENTON
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Speaking of sight plugs, take look at the pic in post #8, anything odd about the sight plug on the front bowl? What sight plug?
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Right sgain.....its M.I.A.
FYI.....the attached pix is my RS23V. and when the car comes out of storage, all three will need new gaskets...even the blue Holley gaskets will need replaced every 2 years.
BOB RENTON
Daves69
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Lol, might have that one covered, dual feed, sight plug higher than stock outer and lower than a center, w/o pump provision Holley Eng #34R 6 or C or G 4842 B .............
Post #8 is my pic from my 1970 Cuda. After looking at the pics here from other members and their 6 pack assembly's I went back and looked at my photo and said "WTF, where's the sight plug on the front carb?" LOL
I'm the 4th owner of the Cuda although it was sold new here in Maryland and has remained here in Maryland it's whole life. When I acquired it there were 3 marine 6 pack carbs on it according to the numbers that I gave to Holley. I sold those carbs and thought I had found the correct carbs for the car, but this was at a time where the internet was in its infancy and not everyone had a computer at home and cell phones weren't invented yet. Point is that research was tougher back then and maybe I didn't buy the right part
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The carb could very well be correct, just has a replacement Holley center hung bowl originally sold as aftermarket, meant for aftermarket Holley 4 bbls. Likely the sight plug is on the driver’s side, as is the Daves69 picture. That bowl was machined for use on the secondary side of an aftermarket 4150 series, with the threads for fuel inlets machined on both sides. You could run the fuel inlet fitting on either side, plug off the other.
Old shot of my ‘70 Road Runner, I pieced this set-up together from new replacement parts ordered through a dealer I worked for back in ‘76sh. All new ’71 carbs, including the Edelbrock intake. All including the hardware had good part numbers then except the fuel lines, considered non-serviceable parts at the time. Had build them from scratch. Note the cruise control and the wrong color orange engine paint. No one offered the correct Chrysler orange engine paint in spray cans back then, not even through Chrysler parts.
Old shot of my ‘70 Road Runner, I pieced this set-up together from new replacement parts ordered through a dealer I worked for back in ‘76sh. All new ’71 carbs, including the Edelbrock intake. All including the hardware had good part numbers then except the fuel lines, considered non-serviceable parts at the time. Had build them from scratch. Note the cruise control and the wrong color orange engine paint. No one offered the correct Chrysler orange engine paint in spray cans back then, not even through Chrysler parts.
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Very cool that you had cruise control AND the six pack setup on your 70 RR. I wonder how common [or rare] that was in 1970?
I have to remove the shaker assembly on my Cuda to see if that front carb has the sight plug on the drivers side. And I need to remove it too in order to see/get to the sight plug on the center carb so I can remove it to let it breathe. Will try to get that done this weekend....thanks again for all of the posts and great info..
I have to remove the shaker assembly on my Cuda to see if that front carb has the sight plug on the drivers side. And I need to remove it too in order to see/get to the sight plug on the center carb so I can remove it to let it breathe. Will try to get that done this weekend....thanks again for all of the posts and great info..
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