2020-B4-4

Author Topic: Quadrajet Question  (Read 204 times)

roadking77

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Quadrajet Question
« on: April 04, 2020, 11:12:37 AM »
I have found the numbers on the carb I thought was for my car. Its a 1979 Pontiac 400 with a 4 speed. It seems that all of the numbers work except for the last regarding the trans. On my carb the last no. is a 2, my research has shown that to be an automatic with an odd no. to be for a manual.
The motor came to me in pieces and I have been told all the parts are original. I have no reason to believe otherwise but hey!, its a 40 yr old car with at least 3 owners that has been dismantled so anything can happen.
My question could there be a chance that this carb is original even though its not marked correct?
Carb #
17059272
2508  BZM
Finished!
77 T/A - I will Call this one DONE!
79 TATA 4sp-Next Project?
79 TATA - Lost to Fire!
86 Grand Prix - Sold
85 T/A - Sold
85 Fiero - Sold
82 Firebird - Sold
'38-CZ 250
'39-BSA Gold Star
'49-Triumph 350
'52-Ariel Red Hunter
'66-BSA Lightning
'01-HD RoadKing

Y88 TA

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Re: Quadrajet Question
« Reply #1 on: April 04, 2020, 12:54:05 PM »
Google tells me that carb # could possibly be from a 301 non turbo with an auto tranny.
« Last Edit: April 04, 2020, 01:00:16 PM by Y88 TA »

roadking77

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Re: Quadrajet Question
« Reply #2 on: April 04, 2020, 03:44:42 PM »
How did you arrive at that?
I searched a couple of different ways and came up with the following:
170 - Newer than 1975
5 - era produced 1976 thru 1979
9 - Year produced   1979
2 - Denotes 4 barrel
7 - Denotes Pontiac branding
2 - Even number denotes use for automatic trans (odd number would be for manual-thus my dilemma)
2508 - Build date which is 250th day of 1978
BZM - Is location of manufacturing plant. I did do several searches for this and found no additional information.
Nothing I read regarding the above numbers had any relation to what the motor is supposed to be.
Finished!
77 T/A - I will Call this one DONE!
79 TATA 4sp-Next Project?
79 TATA - Lost to Fire!
86 Grand Prix - Sold
85 T/A - Sold
85 Fiero - Sold
82 Firebird - Sold
'38-CZ 250
'39-BSA Gold Star
'49-Triumph 350
'52-Ariel Red Hunter
'66-BSA Lightning
'01-HD RoadKing

Maxthe222

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Re: Quadrajet Question
« Reply #3 on: April 04, 2020, 03:55:38 PM »
Doesn't sound like the right carb at all Kenny, the 1979 400/4-speed carb is 17059263, so there are two digits on the end there that are incorrect. It sounds like a '79 301 Auto carb...

I've been chasing a '263 myself I found a guy who has one for extremely cheap off a '79 Trans Am but I think he's going to keep it now... Jeff also has one in hoping to get off him
1979 T/A Y84 WS6
1979 F/A W72 WS6
1971 Formula 400 4-Speed

roadking77

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Re: Quadrajet Question
« Reply #4 on: April 04, 2020, 04:08:41 PM »
Well, that's not the info I wanted :(, where are you getting the 301 part? AND will this work on my 400?
Finished!
77 T/A - I will Call this one DONE!
79 TATA 4sp-Next Project?
79 TATA - Lost to Fire!
86 Grand Prix - Sold
85 T/A - Sold
85 Fiero - Sold
82 Firebird - Sold
'38-CZ 250
'39-BSA Gold Star
'49-Triumph 350
'52-Ariel Red Hunter
'66-BSA Lightning
'01-HD RoadKing

Maxthe222

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Re: Quadrajet Question
« Reply #5 on: April 04, 2020, 04:16:10 PM »
So 1705 is just the carb number, 9 is the year, 2 is 4 barrel. Then, for the next digit, 5 is Olds 403 6 is Pontiac 400 and 7 is Pontiac 301. As for the number at the end I don't think it has to do with the transmission as the carb number for the 403 Olds on my other '79 is 17059253.

If you don't believe me, go through John W's T/A 6.6 article where he lists the part numbers. Sowwwy Kenny, I'm in the same boat as you so I know how ya feel man!

1979 T/A Y84 WS6
1979 F/A W72 WS6
1971 Formula 400 4-Speed

Y88 TA

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Re: Quadrajet Question
« Reply #6 on: April 04, 2020, 04:35:19 PM »
« Last Edit: April 04, 2020, 04:38:17 PM by Y88 TA »

roadking77

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Re: Quadrajet Question
« Reply #7 on: April 04, 2020, 07:23:35 PM »
Ok that clears things up a bit. I did see in several decoding sites (and they are all consistent) that the last digit determines the trans, even number is for auto and odd is for manual.
Y88, I saw that same site you posted, although it shows the correct numbered carb it also says 0 available. I think they are also built to order so it may just be that. Too rich (pardon the pun) for my pocket book right now though! Car stuff is VERY low on my priority list right now.
Finished!
77 T/A - I will Call this one DONE!
79 TATA 4sp-Next Project?
79 TATA - Lost to Fire!
86 Grand Prix - Sold
85 T/A - Sold
85 Fiero - Sold
82 Firebird - Sold
'38-CZ 250
'39-BSA Gold Star
'49-Triumph 350
'52-Ariel Red Hunter
'66-BSA Lightning
'01-HD RoadKing

Maxthe222

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  • Posts: 657
Re: Quadrajet Question
« Reply #8 on: April 04, 2020, 08:06:28 PM »
 Cliff's hasn't had any 400/4-speed carbs for a '79 in ages. I've emailed a fair few times and they don't get them in often, and they normally go quick due to their desirability and their rarity. Don't forget, these were exclusive to the last of the 6.6's, so there were not many to begin with! They also always command top dollar, they've got to be in the top 5 of most expensive production carbs for a Firebird.
1979 T/A Y84 WS6
1979 F/A W72 WS6
1971 Formula 400 4-Speed

Re: Quadrajet Question
« Reply #8 on: April 04, 2020, 08:06:28 PM »
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