Very well done presentations. Detailed, articulate, teacher! I am rebuilding my 70 GTX 6bbl setup and this was very helpful. I always disassemble to the smallest part but you cleared up the best way to do it.
I've pulled some of those emulsion tubes out of old carbs I have recently. One was a metering block from a 4548 Holley and the other a 80145 Holley I just rebuilt. Both of those carbs the very end of the tubes were soldered closed. Ever seen that? both carbs came from different sources, so it wasn't the same person modifying them I know that much.
@@backnine The tubes I took out look identical except soldered shut on the ends and came out of the same inner holes. The outer holes both had a cup plug with a small .025" or so orifice pressed about 3/4 of the way up the well. I take it those were the IFR jets since there weren't any pressed into either the lower or upper locations that you can see externally.
Harold could you possibly take and just put a plug up on the top side there where that two goes into and then screw in a um an orifice on the backside of the metering block where it goes to the carburetor body and bypass that system would that work or would it be wrong thank you
The tube is in the main metering well. The main metering well has a large air bleed in the air horn. There is also a small air bleed in the air horn for the idle circuit. If you have a hole in a straw you would not be able to pull the liquid up. There is a idle pick up tube that just has a straight tube. No reduction. You could use 6-32 brass set screws and drill them .028 or what ever. Then tap the the port I showed that feeds the air/fuel screws and insert the drilled set screws. But you would still need the pickup tube. There is the other type idle pickup system that uses the chamber next to the main chamber. I will do a video on that system. That system would be better to use removable jets for idle system. A lot of after aftermarket metering blocks use removeable idle jets. I did not bring that up in this video. Just want to keep it simple to address this problem. Start talking to much Geek people fall asleep. I know I do.
So just some clarification on the 500 end carbs ... I also have a 340 Six-Pack set up .. looking for some spare ends 500 carbs original parts numbers are 0-4790 rear and 0-4789 front .. i found both but between the price to buy and restore is crazy.. so I purchased a new center from Holley 0-4792 350 CFM .. I see they no longer remanufacture the end 500 carbs for the 340.. so I have been looking at the 500 CFM carbs for the 440 engine 69/70 Holley 0-4365 and the 1971 440 engine 0-4672 .. I've been told the 69/70 has a different style metering plate and the 71 has the same style metering plate that my 340 end carbs have in them, just a different jet size. Question: will either of the 440 end carbs work on my modified 340 ? and if so should I go with the 69/70 or the 71 carbs? Any help would be greatly appreciated from anyone who has dealt with this scenario. Thanks
Harold disregard that last statement I visualized that the tubes would not get into the fuel so that question is totally out of the ballpark so thank you
Also would it be possible to buy some of them tubes from you Umm I would guess that the you would probably sell some so I might be interested in some and let me know thanks
Very well done presentations. Detailed, articulate, teacher! I am rebuilding my 70 GTX 6bbl setup and this was very helpful. I always disassemble to the smallest part but you cleared up the best way to do it.
excellent vid.
Great info.
I've pulled some of those emulsion tubes out of old carbs I have recently. One was a metering block from a 4548 Holley and the other a 80145 Holley I just rebuilt. Both of those carbs the very end of the tubes were soldered closed. Ever seen that? both carbs came from different sources, so it wasn't the same person modifying them I know that much.
The tubes I am showing are idle circuit pick up tubes. They are not emulsion tubes.
@@backnine The tubes I took out look identical except soldered shut on the ends and came out of the same inner holes. The outer holes both had a cup plug with a small .025" or so orifice pressed about 3/4 of the way up the well. I take it those were the IFR jets since there weren't any pressed into either the lower or upper locations that you can see externally.
Thank you very much there Harold that was very very informative thank you again
Harold could you possibly take and just put a plug up on the top side there where that two goes into and then screw in a um an orifice on the backside of the metering block where it goes to the carburetor body and bypass that system would that work or would it be wrong thank you
The tube is in the main metering well. The main metering well has a large air bleed in the air horn. There is also a small air bleed in the air horn for the idle circuit. If you have a hole in a straw you would not be able to pull the liquid up. There is a idle pick up tube that just has a straight tube. No reduction. You could use 6-32 brass set screws and drill them .028 or what ever. Then tap the the port I showed that feeds the air/fuel screws and insert the drilled set screws. But you would still need the pickup tube. There is the other type idle pickup system that uses the chamber next to the main chamber. I will do a video on that system. That system would be better to use removable jets for idle system. A lot of after aftermarket metering blocks use removeable idle jets. I did not bring that up in this video. Just want to keep it simple
to address this problem. Start talking to much Geek people fall asleep. I know I do.
do a video on parkerizing the cz
So just some clarification on the 500 end carbs ... I also have a 340 Six-Pack set up .. looking for some spare ends 500 carbs original parts numbers are 0-4790 rear and 0-4789 front .. i found both but between the price to buy and restore is crazy.. so I purchased a new center from Holley 0-4792 350 CFM .. I see they no longer remanufacture the end 500 carbs for the 340.. so I have been looking at the 500 CFM carbs for the 440 engine 69/70 Holley 0-4365 and the 1971 440 engine 0-4672 .. I've been told the 69/70 has a different style metering plate and the 71 has the same style metering plate that my 340 end carbs have in them, just a different jet size. Question: will either of the 440 end carbs work on my modified 340 ? and if so should I go with the 69/70 or the 71 carbs? Any help would be greatly appreciated from anyone who has dealt with this scenario. Thanks
As always, Great video! Does all Holley metering block style carburetors have these tubes?
No Most use a metering jet pressed in the metering block. I will probably do a video on that style
Harold disregard that last statement I visualized that the tubes would not get into the fuel so that question is totally out of the ballpark so thank you
Emulsifier tube. Quit jamming that awl into the various orifices' of the block.
What Carb base gaskets do you use on the 2300 holley.
How can anyone contact you to have carb rebuilt?
chucknorbid@gmail.com
Also would it be possible to buy some of them tubes from you Umm I would guess that the you would probably sell some so I might be interested in some and let me know thanks