1972 Carb help Qjet
Thread Starter
Intermediate
Joined: Jun 2010
Posts: 26
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From: new lenox il
1972 Carb help Qjet
Hi looking for some help with a Qjet stamped (7054918). It should be from a 72 350, however I'm not confident as I bought the car in pieces. I'm missing what I think is the choke pulloff rod, i have a picture just can't post it. I'd be happy to send it anyone.
I think I need R68 which is pictured in the link below.
http://www.carburetion.com/Quads/chokepull.asp
if anyone can provide a picture of their carb or a reference of a good Qjet shop/store I sure would appreciate it.
My personal email gterhorst@chatsworth.com
ps how/can I post a picture as an image (without a url for it)
I think I need R68 which is pictured in the link below.
http://www.carburetion.com/Quads/chokepull.asp
if anyone can provide a picture of their carb or a reference of a good Qjet shop/store I sure would appreciate it.
My personal email gterhorst@chatsworth.com
ps how/can I post a picture as an image (without a url for it)
Race Director
Joined: Oct 2000
Posts: 12,698
Likes: 3,153
From: Shamong, NJ
7054918 is not a 72 Corvette carb, or any Corvette carb, as far as I can tell.
If it was for any 1972 model year GM car, the 4th digit would be a 2, not a 4. The 4 as the 4th digit, indicates that it's a 74 carb, but the number does not match any 74 Corvette carb, so it most be from some other 1974 GM car.
72 350 Q-Jet numbers are 7042203 & 7042903 with a 4 speed, and 7042202 or 7042902 with an automatic.
If it was for any 1972 model year GM car, the 4th digit would be a 2, not a 4. The 4 as the 4th digit, indicates that it's a 74 carb, but the number does not match any 74 Corvette carb, so it most be from some other 1974 GM car.
72 350 Q-Jet numbers are 7042203 & 7042903 with a 4 speed, and 7042202 or 7042902 with an automatic.
Melting Slicks
Joined: Mar 2008
Posts: 2,023
Likes: 6
From: Austin Tx
Posting a picture will probably help you get the best answer.
Got to Photobucket.com, and create a free account. You can then upload your pictures there. After uploading, look for the 'share' tab. Copy the 'IMG' code, it should copy it for you automatically if you click on it. Then go to your post, and paste the 'IMG' code into it.
Got to Photobucket.com, and create a free account. You can then upload your pictures there. After uploading, look for the 'share' tab. Copy the 'IMG' code, it should copy it for you automatically if you click on it. Then go to your post, and paste the 'IMG' code into it.
Pro
Joined: Jan 2010
Posts: 518
Likes: 12
From: Panhandle
7054918
http://www.oreillyauto.com/site/c/de...2447&ppt=C0359
Found this on O'Reilly's Web Site.
The Tab lists the S/N you have and in the Compatibility Tab says 72, Corvette, V8 - 5.7L vin K 350ci.
.
Corvette Black Book and Catalog of Chevy V-8 Engine Casting Numbers 1955-1993 doesn't list that S/N.
Found this on O'Reilly's Web Site.
The Tab lists the S/N you have and in the Compatibility Tab says 72, Corvette, V8 - 5.7L vin K 350ci.
.
Corvette Black Book and Catalog of Chevy V-8 Engine Casting Numbers 1955-1993 doesn't list that S/N.
Thread Starter
Intermediate
Joined: Jun 2010
Posts: 26
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From: new lenox il
Thanks for the info on the pics, Here is the link
It is a vin K so I guess that makes sense - on another web site (forgot which one) I found that SN was listed as a service part for corvette.
Anyway still need to find the correct choke pulloff rod
It is a vin K so I guess that makes sense - on another web site (forgot which one) I found that SN was listed as a service part for corvette.
Anyway still need to find the correct choke pulloff rod
Le Mans Master
Joined: Mar 2008
Posts: 5,948
Likes: 72
From: Oxford MA-----You just lost the game!!!!
Would you humor me and double check that carb number? It doesn't seem to make any sense to me, you may have misread it. Then again, it might be some weird factory replacement carb, or some damn thing.
Scott
Scott
Melting Slicks
Joined: Mar 2008
Posts: 2,023
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From: Austin Tx
I don't think the carb # matters, it's not the original, and it's obvious that it's a divorced choke style q-jet.
That said, it appears that you are missing a number of parts. You are missing the secondary choke rod, and the secondary lockout, and the divorced choke coil.
My guess is that the previous owner replace the intake manifold, and the new one did not have a place to mount the divorced choke. So the previous owner removed the secondary lockout, and choke rod.
What kind of intake manifold do you have?
That said, it appears that you are missing a number of parts. You are missing the secondary choke rod, and the secondary lockout, and the divorced choke coil.
My guess is that the previous owner replace the intake manifold, and the new one did not have a place to mount the divorced choke. So the previous owner removed the secondary lockout, and choke rod.
What kind of intake manifold do you have?
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Le Mans Master
Joined: Aug 2006
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From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
Missing Choke Rod
This is carb #7042211 which is for a 72 truck, will this help you to find the missing rod?
Thread Starter
Intermediate
Joined: Jun 2010
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From: new lenox il
Petes thanks for the photo.
Mashman - its a Summit intake sum-226008. thanks for the information on missing parts.
I have the divorced coil/rod and in process of making a bracket to hold it, unless you know where I can buy one.
Still need help on finding the correct choke pull off rod.
In the above picture isnt that the secondary lockout (stamped with 42723)?
or below with my finger on it?
Mashman - its a Summit intake sum-226008. thanks for the information on missing parts.
I have the divorced coil/rod and in process of making a bracket to hold it, unless you know where I can buy one.
Still need help on finding the correct choke pull off rod.
In the above picture isnt that the secondary lockout (stamped with 42723)?
or below with my finger on it?
Melting Slicks
Joined: Mar 2008
Posts: 2,023
Likes: 6
From: Austin Tx
Petes thanks for the photo.
Mashman - its a Summit intake sum-226008. thanks for the information on missing parts.
I have the divorced coil/rod and in process of making a bracket to hold it, unless you know where I can buy one.
Still need help on finding the correct choke pull off rod.
In the above picture isnt that the secondary lockout (stamped with 42723)?
or below with my finger on it?
Mashman - its a Summit intake sum-226008. thanks for the information on missing parts.
I have the divorced coil/rod and in process of making a bracket to hold it, unless you know where I can buy one.
Still need help on finding the correct choke pull off rod.
In the above picture isnt that the secondary lockout (stamped with 42723)?
or below with my finger on it?
Here is a picture of my carb, it's a 7042202, and should be pretty much the same as yours.
Here are a couple of pictures of the secondary choke rod - there is no number stamped on it.
Thread Starter
Intermediate
Joined: Jun 2010
Posts: 26
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From: new lenox il
Well I know what it is stamped on it...7054918 - I confirmed that. it doesn't follow normal numbering, comes up in several locations as "service part". The engine fires, carb/fuel pump works well enough at idle, after a few more adjustments/connections and I'll test it on the street.
Le Mans Master
Joined: Mar 2008
Posts: 5,948
Likes: 72
From: Oxford MA-----You just lost the game!!!!
OK, I think I may have found it!! According to the list of carb numbers in Lars Grimsrud's "How to Tune a Q-Jet", carb #17054918 is a Chevy SR (service replacement??) for 1972 Corvettes, Novas, and Camaros with 402-454 engines. The number is 17054918, maybe the 1 didn't get stamped hard enough, or is unreadable for some other reason. (although, it could just be some weirdo carb, I guess.) Primary jets--77, primary rods--48, power piston spring--7036019, secondary rods--CM. If I could see a picture of it, I could tell if it's a 70 or a 170, but I can't view pics on this computer, I'm at work, (he he, goofing off behind the boss's back!!)
Scott
Scott
Scott
Scott
Thread Starter
Intermediate
Joined: Jun 2010
Posts: 26
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From: new lenox il
Scott,
I put more photos at:
http://s1103.photobucket.com/albums/g465/gterhorst/
I think I see your boss coming - alt & tab.
I put more photos at:
http://s1103.photobucket.com/albums/g465/gterhorst/
I think I see your boss coming - alt & tab.
Advanced
Joined: Mar 2011
Posts: 78
Likes: 1
From: SoCal California
Go with Sean Murphy Induction. He has done numerous Q-Jets for me and his work is outstanding.
www.smicarburetor.com
www.smicarburetor.com
