QUadrajet # location
Melting Slicks
Joined: Oct 2000
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From: TEXASTEXASTEXASTEXAS TEXASTEXASTEXASTEXAS
St. Jude Contributor
Originally Posted by ESU
Where can I find the model (?) # for a rochester quadrajet, 79 vette?
JB
Tech Contributor
Joined: Aug 1999
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From: At my Bar drinking and wrenching in Lafayette Colorado
The Q-Jet model number is located on the driver's side of the carb, in the float bowl, directly above the secondary throttle shaft location. The number is vertical. Carb number for a 79 Vette will be one of the following numbers:
17059203 (CHEV 79 FED VETTE A/C & NON 4-SPD)
17059210 (CHEV 79 VETTE L-82 H.P. NON-A/C AUTO)
17059211 (CHEV 79 VETTE L-82 H.P. A/C & NON 4-SPD)
17059228 (CHEV 79 VETTE L-82 H.P. A/C AUTO)
The number has nothing to do with jet sizing.
You can find all the numbers along with correct jet sizes in my Q-Jet chart. E-mail me if you need a copy (V8FastCars@msn.com).
17059203 (CHEV 79 FED VETTE A/C & NON 4-SPD)
17059210 (CHEV 79 VETTE L-82 H.P. NON-A/C AUTO)
17059211 (CHEV 79 VETTE L-82 H.P. A/C & NON 4-SPD)
17059228 (CHEV 79 VETTE L-82 H.P. A/C AUTO)
The number has nothing to do with jet sizing.
You can find all the numbers along with correct jet sizes in my Q-Jet chart. E-mail me if you need a copy (V8FastCars@msn.com).
Melting Slicks
Joined: Oct 2000
Posts: 3,023
Likes: 2
From: TEXASTEXASTEXASTEXAS TEXASTEXASTEXASTEXAS
St. Jude Contributor
Originally Posted by lars
The number has nothing to do with jet sizing.
BTW, as in the quote above, Bizzoco also uses the phrase "model number" interchangeably with "part number" when talking about carbs. That don't seem right to me, but I'll bow to the weight of authority.
JB
Tech Contributor
Joined: Aug 1999
Posts: 14,380
Likes: 6,390
From: At my Bar drinking and wrenching in Lafayette Colorado
JB -
Funny how people can become "authorities" with faulty information....
The "70" prefix on the Q-Jet is the number identifier for Rochester Products. Q-Jets manufactured by Carter did not have the "70" prefix. All Rochester-built carbs manufactured up through 1974 are prefixed with "70." In 1975, the Rochester identifier code was changed to "170" on all Rochester carb products - not just the Q-Jets with the different rod length.
1969 Corvette carbs were jetted with #66 and #67 jets on the small blocks and #71 on the big blocks. No production Vettes were ever jetted with #70 jets in 1969... I think Ray is a little off in his conclusions...
You are correct: The number on the carb is the part number - not the model number. The "Model Number" on the early carbs is 4MV, and M4M on the 1975 + carbs. Model number and part number is not the same, although many people (including myself) will often interchange the two terms incorrectly.
Funny how people can become "authorities" with faulty information....
The "70" prefix on the Q-Jet is the number identifier for Rochester Products. Q-Jets manufactured by Carter did not have the "70" prefix. All Rochester-built carbs manufactured up through 1974 are prefixed with "70." In 1975, the Rochester identifier code was changed to "170" on all Rochester carb products - not just the Q-Jets with the different rod length.
1969 Corvette carbs were jetted with #66 and #67 jets on the small blocks and #71 on the big blocks. No production Vettes were ever jetted with #70 jets in 1969... I think Ray is a little off in his conclusions...
You are correct: The number on the carb is the part number - not the model number. The "Model Number" on the early carbs is 4MV, and M4M on the 1975 + carbs. Model number and part number is not the same, although many people (including myself) will often interchange the two terms incorrectly.
