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-   -   Rochester carburetor identification (http://www.chevelles.com/forums/showthread.php?t=80741)

Steve Petzer Aug 17th, 04 12:56 AM

I have a mystery Rochester Q-Jet carburetor. Actually not usre where I got it. Found it in the garage! Anyway, the model seems to be 7043925. This model number is to the rear of the carburetor on a circular tab. Also, running vertical down in the middle of the back of the carb is the number 29865. Has a 8 or B in front of the 29865. There is an attached paper tag that someone wrote "70-72 350" on. So, gueesing this is to a 1970 to 1972 350 c.u. Again guessing. Thanks for the help. One other question. Restoring a 1969 Chevelle 396/350. Is the correct Rochester carb for this 7029215 (think it is per Chevy by the Numbers)?

Unclepennybags Aug 17th, 04 6:44 AM

That is not the correct location for a carb #. The carb # is located on the driver's side of the carb above the secondary throttle shaft. It will be stamped vertically. Take a look at my Qj photos by clicking on my signature.

Mike

Mike Feudo Aug 17th, 04 9:47 AM

65 or 66 carb they had the number written in a circular pattern at the back of the carb. It isn't a real good carb many design problems that were fixed in 67.

JWagner Aug 17th, 04 12:02 PM

Try this info at quadrajet.com:

http://www.carbs.net/quadnumber.htm
That will get you started.

Steve Petzer Aug 22nd, 04 10:59 PM

Thanks for the replies. After relooking at the carburetor I did find the following numbers on the side.

7029207
0437

Looks like this fits a 1969 Corvette 350/350 HP engine. Not sure what the "0437" means though. Would not think this is a date code since ends with a 7 which I thought would be the year.

Neal Wright Aug 23rd, 04 11:43 AM

I'll post this ... though someone definitely correct me if I am wrong.

My understanding is that MOST (not all) of the "original" carbs are marked without the 70 in front. As in 29207.

The service replacement carbs were mostly marked with the 7029207. So that would make date code 0437 for Feb 12, 1977.

Neal

Bill Pritchard Aug 24th, 04 8:16 PM

I have two model year 69 Q-Jets - the original one that came on my convertible, and a spare. Both of them are marked '29200EE'; the original one for my car is dated '3478' and the spare is dated '3318' ( the 347th and 331st days of CY1968, respectively). The 'EE' code is supposed to appear on the car's Build Sheet. Colvin's book (Chevrolet by the Numbers) clearly states that some carbs may be missing the '70' prefix. So, Neal's theory seems to be logical. The '0437' on Steve's carb makes no sense other than the explanation he has provided.

Steve, yes, '7029215' would be correct for your car. Actually, '702921x' would be correct as long as the 'x' was an odd number, denoting a manual trans application.

136679ss Aug 25th, 04 2:27 AM

the date code is probably 0439 or a misstamp for the 43 day of 1969. Also Bill I thought I read somewhere the two letter codes "EE" indicated either the Primary or Secondary Jet sizes, don't remember which; either way its interesting to know they appeared upon the build sheet. Mine is void of the 70 as well; being a 29200 correct for a 396/325 th400 car. jason.

Unclepennybags Aug 25th, 04 6:50 AM

Quote:

Originally posted by Steve Petzer:
Thanks for the replies. After relooking at the carburetor I did find the following numbers on the side.

7029207
0437

Looks like this fits a 1969 Corvette 350/350 HP engine. Not sure what the "0437" means though. Would not think this is a date code since ends with a 7 which I thought would be the year.

If the carb had been built in 1969 the last digit of the four digit date code would have been "9". It's not, so it's probably a replacement carb. Not surprising because if you were going to get a replacement carb, the 7029207 was "the" carb to get. The 0437 likely means the 43rd day of 1977, or 1987. I have an old 7029207 as well, and it also has a later date code along with some non 1969 features.

Mike

ss3964spd Aug 25th, 04 10:50 AM

Mike, I think most - if not all, early QJ's - 65/66, had the numbers stamped into a colored, circular tin disk. The disk was then staked into a circular recess that was cast into the carb body on the drivers side front. Presumably the colored disk helped ensure the correct carb got installed.

Dan

Unclepennybags Aug 25th, 04 2:02 PM

Quote:

Originally posted by ss3964spd:
Mike, I think most - if not all, early QJ's - 65/66, had the numbers stamped into a colored, circular tin disk. The disk was then staked into a circular recess that was cast into the carb body on the drivers side front. Presumably the colored disk helped ensure the correct carb got installed.

Dan

Dan,

True. The '67 carbs that I've seen had that colored disk also. The '68 carbs that I've seen have the conventional stamped numbers.

Steve Petzer Aug 25th, 04 10:41 PM

Kinda figure at this point it is a replacement carburetor that I have. There is one with the same numbers as mine (7029207) on ebay with 2 hours left on it and he references the below info on his carburetor. Might be one of you all who sent him an email on the possibilities of his being a replacement carburetor. Thanks for the help. Learn something new everyday!! Ebay Item description follows:

Item # 2487537349

This is a Corvette Rochester Quadrajet carburator number 7029207.

This carb is correct for a 1969 Corvette, 350 c.i. - 350 H.P. - 4 speed. Carb would also work well with a Camaro, Nova, Chevelle, and Monte Carlo with the 350 cubic motor and 3 or 4 speed manual transmission or auto.

On Aug-22-04 at 16:01:01 PDT, seller added the following information:

Note: I have received 1 comment regarding the Rochester Carb date which appears to be 0067 or the 6th. day of 1967 or 1977 ??? The individual stated the carb may be a "service replacement".. I am not aware of a "service replacement" Rochester carb but I thought I would pass this on to potential bidders. I am only going off of the ID number on the carb - #7029207 which is a 1969 Corvette ID.


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