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Canadian Poncho Homepage -> Canadian Poncho -> Hillar's General 65-70 Full Size Forum -> Carb Encoding
Post Info TOPIC: Carb Encoding
davepl


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Carb Encoding
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I say encoding rather than decoding because I need to figure out what the numbers -should- be if I had the right carb.  Pretty sure I have a Canadian Tire reman or similar in place of the original Q-Jet.

Here are the specifics, if someone can help me work backwards towards what carb I need, great!

1969 427/390
Manual Trans
No A.I.R.
No California Emissions
Production Date April 9, 1969

I'm guessing

70 - First two digits for 66-75
2 - 66 through 69
9 - 1969
2 - Four Barrel Q-Jet
0 or 1 - Chevrolet (NOT PONTIAC, RIGHT?)
Odd Digit for Manual Trans

So something like 7029203?



-- Edited by davepl on Tuesday 9th of January 2018 10:45:09 PM

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427carl


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Maybe here ?

 

http://www.chevyhardcore.com/tech-stories/choose-your-quadrajet-number-identification-guide/



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JC2+2


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My Chevy Casting Numbers book shows 7029203 is for '69 350 in Chevelle, Camaro, Chevy2, and Corvette manual transmission. Doesn't show '69 427 for Passenger but 7029215 is for '69 427 Corvette manual transmission and also used for 396 manual Chevelle, Camaro and Chevy2. 7029117 is for '69 396 manual in Passenger and 7029119 is for 396 manual with AC in Passenger. These last numbers may be shared with the 427 as well.

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SD 396


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My parts book shows two listed for Pontiac 396 & 427 engines. 7029201 and 7029215. I know the latter was the one on my Beaumont. 

Maybe someone has an older book that still lists the original part number in the listing. Group 3.725



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4SPEED427


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7029201 or 7029215 is what the parts book says. However, the book I have advertised right now on CP has a very extensive carb listing and I will try to get a chance later to scour it for info.

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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
Pontiacanada


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davepl wrote:

 

I'm guessing

70 - First two digits for 66-75
2 - 66 through 69
9 - 1969
2 - Four Barrel Q-Jet
0 or 1 - Chevrolet (NOT PONTIAC, RIGHT?)
Odd Digit for Manual Trans

So something like 7029203?

 Mine for my '64 Parisienne, 283, automatic is 7024110 (verified) ... so I know that the 702 prefix has nothing to do with dates.

 

IMG_1436.JPG



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'64 Parisienne CS "barn find" - last on the road in '86 ... Owner Protection Plan booklet, original paint, original near-mint aqua interior, original aqua GM floor mats, original 283, factory posi, and original rust.

davepl


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It's not correct to say the 702 prefix has "nothing" to do with dates, but it's not worth arguing. I presume it was a batch or cast number that they ran out of in in the mid 70s and changed it. Until then it was 702, that's all.

I hadn't thought of looking in the parts book because I didn't know that number on the side of the QJet was actually the parts number! Once SD396 gave me the group number I pulled out the catalog and it turns out years ago I had already underlined it for myself

7016925 1969/ALL ST WITH 427 ENG

So there you go! Thanks for the help folks!

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4SPEED427


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Dave, what year is the date on that book? I can't find that number in any of my books.

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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
davepl


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Here you go... don't know the date on the book, sorry:
10_28 AM 1_10_2018 - Bitmap.png



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4SPEED427


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I'm curious which book it is now that I see 455 listed also. Time to do more digging.

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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
davepl


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Found it! The parts book I have (and that the photo is from) is December 1970.

Even Cliff Ruggles was at a loss as to the 701 numbers. Seems like every QJet in the world starts with 702!  He said:

 

"You are most likely looking at casting numbers for the main casting which will appear on the rear of the casting in a small circle.


NONE of those numbers are correct per the application listed as far as the stamped part number.

 

7029215 will be the correct part number for your application, and I do not have any left."



When I googled that part number, I found Corvette guys offering over $1000 for cores!



-- Edited by davepl on Wednesday 10th of January 2018 01:54:31 PM

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seventy2plus2


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My Dec 1972 parts book (Group 3.725 Rochester carburetors) shows 7029215.   Go to the forward part of the book with all the illustrations.

Actually, if you have a 1969 Pontiac & Acadian Chassis / Shop Manual, it should show the various carburetor #'s for the various applications in the "Specifications" section in the back of the book. In my 1970 Manual, they're on page 11.



-- Edited by seventy2plus2 on Wednesday 10th of January 2018 09:30:54 PM

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davepl


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Even if the parts book were right, everyone is going to EXPECT a 7029215 so I guess that's what I look for.

Sadly, that carb is shared with 1969 Corvette 427 as well, and people are offering a grand on CorvetteForum for cores!

Here's one rebuilt for $1600, but it's one month too new for my car:  https://www.ebay.com/itm/Restored-Carburetor-1969-396-350-Camaro-427-390-Corvette-7029215-Dated-0569-/112130037755

 



-- Edited by davepl on Thursday 11th of January 2018 11:43:24 AM

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Mondo Poncho


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I would like to add this little preface to my post. I dont want to derail  your thread Dave. Im not in any particular hurry with my cars. But if information on my carburetters is right there for the taking while you guys are investigating Daves carbs- anyone out there please feel free to let me know. But Im not looking for anyone to go to any lengths to answer my question  here or to take focus off of Daves search which is more urgent. Thanks 

 

Im following this thread with interest. When everybody figures this out, would it be possible to also tell me what codes I should be looking for re my 1967 2+2 cars with L36 and M20?

Blue coupe: cowl tag says March 29 and GM Canada docs have production date April 4 67

Red convert: cowl tag says May 18 and GM Canada docs have production date May 24 67

I guess since these carbs would also be correct for 1967 Corvette, I shouldnt expect them to be any cheaper or easier to find than Daves 69?
Thank you much!





-- Edited by Mondo Poncho on Thursday 11th of January 2018 02:59:59 PM

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norontcan


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Here's the page from the parts book.

69 396&427 Rochester carbs.jpg



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