Carb Date
Thread Starter
Instructor
Joined: May 2013
Posts: 105
Likes: 8
From: Il
Carb Date
Back about 30 years ago I added a tri power on my car. 390/427 Over the years I have lost the original carb now I am looking for the right date code My car was built in Dec 66 what would the date code be? Thanks for any help George
Safety Car
Joined: May 2003
Posts: 4,797
Likes: 239
From: Ocean Township NJ
Carb should be dated prior to engine build date. Within 6 months is acceptable, but about 2 weeks to a month before is best.
Race Director
Joined: Apr 2005
Posts: 11,265
Likes: 2,131
From: Bowling Green, Kentucky
NCRS allows 6 months, but about 2-6 weeks prior to car build date is the norm.
Larry
Melting Slicks
Joined: Apr 2010
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Depends on the component – if the component was installed by the engine plant (manifolds, water pump, etc.), its date should be prior to the engine build date. If the component was installed at St. Louis (carburetor, alternator, etc.), the date code “could” be after engine build date but before final assembly date. With 2-4 weeks being the typical time between a midyear engine assembly date and the car’s final assembly date, the point is moot in most cases.
Thread Starter
Instructor
Joined: May 2013
Posts: 105
Likes: 8
From: Il
Depends on the component – if the component was installed by the engine plant (manifolds, water pump, etc.), its date should be prior to the engine build date. If the component was installed at St. Louis (carburetor, alternator, etc.), the date code “could” be after engine build date but before final assembly date. With 2-4 weeks being the typical time between a midyear engine assembly date and the car’s final assembly date, the point is moot in most cases.
Race Director
Joined: Apr 2005
Posts: 11,265
Likes: 2,131
From: Bowling Green, Kentucky
First position = year. You want a "6"
Second position = month of the year, with A and B for November and December. You want a "7 or 8 or 9 or 0 or A" in this position. Possibly a "B" could also be used.
Third position = week of the month. You want "1-2-3-4-5" in this position, except if the Second Position above is a "B". Then you will only be able to have a "1 or 2" for that month.
There are instances where the carb was dated just a few days before the car build date. i.e. "just in time delivery".
You do NOT want a four digit date code, since 4 digit codes started around 1972........and also used a different date format.
Larry
Last edited by Powershift; Sep 7, 2017 at 11:15 AM.
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Le Mans Master
Joined: Apr 2002
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From: Kirtland Ohio
Yes the first digit is the year and with your build date you will need one that starts with a 6. From this thread I am guessing that you need a Holley list #3811. Unless your car was from California and came with smog. Either way your search will be a little difficult as these carbs are hard to find.