holley 1904
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5th Wheeling
Joined: Feb 2005
Posts: 41
Likes: 0
From: Carlsmalo,ca.
holley 1904
Hi
I have five carbs, and when ordering a new rebuild kit I found the numbers on the body not all mach each other, different years I guess.
My question is how can I identify them to know what they were for?
and what rebuild kit are for wich carb
Thanks
I have five carbs, and when ordering a new rebuild kit I found the numbers on the body not all mach each other, different years I guess.
My question is how can I identify them to know what they were for?
and what rebuild kit are for wich carb
Thanks
Senior User
Joined: Feb 2011
Posts: 298
Likes: 1
From: Huntsville, Al
Holley 1900 1V Tech Info - The Carburetor Doctor
Lead Driver
Joined: Dec 2004
Posts: 7,669
Likes: 13
From: San Jose, CA
Good luck with the rebuild. They can be a pain. You should Google "Holley 1904 rebuild". You'll find a great "how to" article posted on the IHC forum, as Internationals and Studebakers used the Holley 1904 carbs. There were also plenty of discussion about them on FTE sometime last year.
I had about nine of them. Took them all in to a local rebuilder. He was able to pick out two decent carbs out of the nine that I gave him to rebuild. One of the issues with the Holley 1904 carbs is that they warp around the bowl cover from being overtightened. They will leak from the bottom of that area. My rebuilder had to straighten those areas slightly and then hand-make the gasket for the bowl. I also got a one year warranty and each carb cost me $130 to rebuild.
Also, some Holley 1904 are actually Holley 1960. Both look alike. The other thing to consider are the jets. Depending on the year of the vehicle and the engine, the carb had different jets. If you don't have the correct size jets in your carb for your engine type, you may be starving or flooding the carb.
Here are my Holley 1904s after a rebuild.
I had about nine of them. Took them all in to a local rebuilder. He was able to pick out two decent carbs out of the nine that I gave him to rebuild. One of the issues with the Holley 1904 carbs is that they warp around the bowl cover from being overtightened. They will leak from the bottom of that area. My rebuilder had to straighten those areas slightly and then hand-make the gasket for the bowl. I also got a one year warranty and each carb cost me $130 to rebuild.
Also, some Holley 1904 are actually Holley 1960. Both look alike. The other thing to consider are the jets. Depending on the year of the vehicle and the engine, the carb had different jets. If you don't have the correct size jets in your carb for your engine type, you may be starving or flooding the carb.
Here are my Holley 1904s after a rebuild.
Cargo Master
Joined: May 2008
Posts: 2,486
Likes: 336
From: Bakersfield, CA
^^hah, good stuff.
Check your main well(large valve body inside of fuel bowl) for cleanliness and the economizer valve for proper movement, be very meticulous, these carbs(1904/1960) don't need much out of whack to not work correctly.
As Ilya said, go on to IHON.com and find Michael Mayben, he knows these carbs down to the science. But his rebuilds aren't cheap, so at least try it yourself first and make sure EVERYTHING is in working order. The main wells on these things love to crap out on people, and are sometimes already tampered with and in poor condition.
Check your main well(large valve body inside of fuel bowl) for cleanliness and the economizer valve for proper movement, be very meticulous, these carbs(1904/1960) don't need much out of whack to not work correctly.
As Ilya said, go on to IHON.com and find Michael Mayben, he knows these carbs down to the science. But his rebuilds aren't cheap, so at least try it yourself first and make sure EVERYTHING is in working order. The main wells on these things love to crap out on people, and are sometimes already tampered with and in poor condition.
Cargo Master
Joined: Aug 2010
Posts: 2,927
Likes: 135
From: Houston
I have found these to be easy to rebuild. The only additional warning I would add is to reuse the original needle and seat. The replacement seats I have seen have a through hole that is twice the size as the original and cause carburetor flooding after a short time. I also don't like the new viton tipped needles as these develop a groove where they seat and then don't seal.
Cargo Master
Joined: May 2008
Posts: 2,486
Likes: 336
From: Bakersfield, CA
I have found these to be easy to rebuild. The only additional warning I would add is to reuse the original needle and seat. The replacement seats I have seen have a through hole that is twice the size as the original and cause carburetor flooding after a short time. I also don't like the new viton tipped needles as these develop a groove where they seat and then don't seal.
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Postmaster
Joined: Jul 2003
Posts: 2,688
Likes: 4
From: Southern Oregon
Good luck with the rebuild. They can be a pain. You should Google "Holley 1904 rebuild". You'll find a great "how to" article posted on the IHC forum, as Internationals and Studebakers used the Holley 1904 carbs. There were also plenty of discussion about them on FTE sometime last year.
I had about nine of them. Took them all in to a local rebuilder. He was able to pick out two decent carbs out of the nine that I gave him to rebuild. One of the issues with the Holley 1904 carbs is that they warp around the bowl cover from being overtightened. They will leak from the bottom of that area. My rebuilder had to straighten those areas slightly and then hand-make the gasket for the bowl. I also got a one year warranty and each carb cost me $130 to rebuild.
Also, some Holley 1904 are actually Holley 1960. Both look alike. The other thing to consider are the jets. Depending on the year of the vehicle and the engine, the carb had different jets. If you don't have the correct size jets in your carb for your engine type, you may be starving or flooding the carb.
Here are my Holley 1904s after a rebuild.
I had about nine of them. Took them all in to a local rebuilder. He was able to pick out two decent carbs out of the nine that I gave him to rebuild. One of the issues with the Holley 1904 carbs is that they warp around the bowl cover from being overtightened. They will leak from the bottom of that area. My rebuilder had to straighten those areas slightly and then hand-make the gasket for the bowl. I also got a one year warranty and each carb cost me $130 to rebuild.
Also, some Holley 1904 are actually Holley 1960. Both look alike. The other thing to consider are the jets. Depending on the year of the vehicle and the engine, the carb had different jets. If you don't have the correct size jets in your carb for your engine type, you may be starving or flooding the carb.
Here are my Holley 1904s after a rebuild.
used a 1904.
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