1972 LT-1 Carburator - NCRS Discussion Boards

1972 LT-1 Carburator

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  • John H.
    Beyond Control Poster
    • December 1, 1997
    • 16513

    #16
    Re: 1972 LT-1 Carburator

    Originally posted by Bryan Montford (32138)
    Any comments about not having the A in the source #?
    Per Colvin's book, Holley says you won't see any "A" characters actually stamped on a carburetor as a suffix to the LIST number - only in the paper listings. They suffixed the stamped LIST number with -1, -2, -3, etc. to indicate changes in a production design (like the 2818 for '64, and the 2818-1 for 1965 as shown below).
    Attached Files

    Comment

    • Terry M.
      Beyond Control Poster
      • September 30, 1980
      • 15573

      #17
      Re: 1972 LT-1 Carburator

      Gee John, I guess I am not seeing those List 6239A-1A stamps. In the old days I would have attributed this anomility to the beast, but I can't lay it at that doorstep anymore. I'll have to move up the eye surgery I have scheduled.
      Terry

      Comment

      • Patrick H.
        Beyond Control Poster
        • December 1, 1989
        • 11608

        #18
        Re: 1972 LT-1 Carburator

        Originally posted by John Hinckley (29964)
        Per Colvin's book, Holley says you won't see any "A" characters actually stamped on a carburetor as a suffix to the LIST number - only in the paper listings. They suffixed the stamped LIST number with -1, -2, -3, etc. to indicate changes in a production design (like the 2818 for '64, and the 2818-1 for 1965 as shown below).
        I hope Colvin's book is more accurate than the magazine he produces.

        Patrick
        Vice-Chairman (West), Michigan Chapter NCRS
        71 "deer modified" coupe
        72 5-Star Bowtie / Duntov coupe. https://www.flickr.com/photos/124695...57649252735124
        2008 coupe
        Available stickers: Engine suffix code, exhaust tips & mufflers, shocks, AIR diverter valve broadcast code.

        Comment

        • Clem Z.
          Expired
          • January 1, 2006
          • 9427

          #19
          Re: 1972 LT-1 Carburetor

          Originally posted by Terry McManmon (3966)
          I think -- memory again -- that the R6239-1A was added to the TIM&JG in the last update, so Richard's information may be dated.
          the holley parts and specs catalogue shows R-6239-1A for LT-1 corvette S/T. it shows R-6239A but does not say corvette in the listing. could just be a printing error. the A carb shows 6828A and 4519 metering bodies and the -1A show 7102A and 7101A

          Comment

          • Bryan M.
            Expired
            • April 1, 1999
            • 386

            #20
            Re: 1972 LT-1 Carburetor

            Does this carb fall within the guidelines of what is considered correct for my 72 LT-1?

            Comment

            • Brad M.
              Expired
              • July 31, 2005
              • 262

              #21
              Re: 1972 LT-1 Carburator

              Brian, that would seem to be within the allowed 6 months. The 1B2 would be 2nd week of December 1971 and your trim tag date indicates April 27th.

              Also, I looked at the extra 72 carb from lt-1 that I have and it has the following:
              3999263-GA
              List 6239-1
              241 (date code 1st week April 72)
              and metering plates have the 62391 on each and 7101 for one and 7102 for the other
              It also has an ink stamp of 4702D on the top.
              So it has the same numbers as yours.

              Comment

              • Bryan M.
                Expired
                • April 1, 1999
                • 386

                #22
                Re: 1972 LT-1 Carburator

                Thank you Brad. All is well.

                Comment

                • Drew P.
                  Very Frequent User
                  • June 30, 1977
                  • 180

                  #23
                  Re: 1972 LT-1 Carburator

                  Originally posted by Brad Maynard (44253)
                  Brian, that would seem to be within the allowed 6 months. The 1B2 would be 2nd week of December 1971 and your trim tag date indicates April 27th.

                  Also, I looked at the extra 72 carb from lt-1 that I have and it has the following:
                  3999263-GA
                  List 6239-1
                  241 (date code 1st week April 72)
                  and metering plates have the 62391 on each and 7101 for one and 7102 for the other
                  It also has an ink stamp of 4702D on the top.
                  So it has the same numbers as yours.
                  Hello Bryan and Martin,
                  My 1972 coupe # 18,061
                  trim tag info:
                  I05 = body built April 5, 1972
                  945 = Bryar Blue paint
                  404 = black leather
                  engine assy:
                  V0329 CKY
                  carburator:
                  3999263-GA
                  6239-1
                  231 = 1972, March, first week
                  Regards,
                  Drew Papsun

                  Comment

                  • Bryan M.
                    Expired
                    • April 1, 1999
                    • 386

                    #24
                    Re: 1972 LT-1 Carburator

                    Originally posted by Drew Papsun (1412)
                    Hello Bryan and Martin,
                    My 1972 coupe # 18,061
                    trim tag info:
                    I05 = body built April 5, 1972
                    945 = Bryar Blue paint
                    404 = black leather
                    engine assy:
                    V0329 CKY
                    carburator:
                    3999263-GA
                    6239-1
                    231 = 1972, March, first week
                    Regards,
                    Drew Papsun
                    Thanks for the info Drew. It looks like my carb falls in line with yours and Brad's extra carb<<<<<Martin

                    Comment

                    • John H.
                      Beyond Control Poster
                      • December 1, 1997
                      • 16513

                      #25
                      Re: 1972 LT-1 Carburetor

                      Originally posted by Bryan Montford (32138)
                      Does this carb fall within the guidelines of what is considered correct for my 72 LT-1?
                      That's a February, 1971 carb - too early for your '72.

                      Comment

                      • Bryan M.
                        Expired
                        • April 1, 1999
                        • 386

                        #26
                        Re: 1972 LT-1 Carburetor

                        Originally posted by John Hinckley (29964)
                        That's a February, 1971 carb - too early for your '72.
                        My NCRS manual shows for a Holley that a date code of 1B2 is
                        1=1971
                        B=December
                        2=week of month of production
                        I have the 3rd edition. Has the Holley Id section changed in the 4th edition?

                        Comment

                        • Brad M.
                          Expired
                          • July 31, 2005
                          • 262

                          #27
                          Re: 1972 LT-1 Carburator

                          I thought it worked just like Bryan indicates above, months Jan to Oct are numbers 1 through 0, then they used A and B after they ran out of numberical digits.

                          Plus, the 71 lt-1 used 4801, so unless 6239 was used on some other application, there would not have been a reason for one to exist in Feb 71

                          Comment

                          • Roy V.
                            Expired
                            • April 8, 2008
                            • 296

                            #28
                            Re: 1972 LT-1 Carburator

                            Bryan, my fourth edition TIM&JG has the same holley ID information as your third edition.
                            Regards

                            Comment

                            • John H.
                              Beyond Control Poster
                              • December 1, 1997
                              • 16513

                              #29
                              Re: 1972 LT-1 Carburetor

                              Originally posted by Bryan Montford (32138)
                              My NCRS manual shows for a Holley that a date code of 1B2 is
                              1=1971
                              B=December
                              2=week of month of production
                              I have the 3rd edition. Has the Holley Id section changed in the 4th edition?
                              Yup, you're right - brain fart on this end - somehow I read it as 122, not 1B2.

                              Comment

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