Quadrajet Problem Solving > Quadrajet Parts and Numbers

2 Q-Jets what do I have ?

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Marx3:

--- Quote from: Ethan1 on October 27, 2014, 07:28:00 PM --- Yes, 7041540 is indeed an 800CFM version off a 1971 Buick Electra and Riviera 455cid, A/T. ;)

--- End quote ---

say what? I always thought they didn't make the large cfm units untill the M4M came in ´75...?

Ethan1:

--- Quote from: Marx3 on November 05, 2014, 03:16:27 AM ---say what? I always thought they didn't make the large cfm units untill the M4M came in ´75...?

--- End quote ---

 From Cliff's book:

 
--- Quote ---In 1971 Buick improved the performance of its large-displacement engines by increasing the airflow capacity of its Quadrajets. Rather than expanding on Pontiac's approach, they simply enlarged the primary bore in the main body. Typically 1 3/32 inches in diameter, Buick's modifications increased bore diameter to 1 7/32 inches. Generally referred to by airflow capacity of "approximately 800 cfm," Buick continued using this design through 1974. Its advantage of additional airflow improved performance, but unlike Pontiac's approach, Buick's Quadrajet retained the velocity boosters for maximum throttle response and improved emissions.
--- End quote ---

Marx3:
ohh yes... I read that book so many times, but that part must have slipped my mind :-)

Ethan1:

--- Quote from: Marx3 on November 07, 2014, 12:01:30 AM ---ohh yes... I read that book so many times, but that part must have slipped my mind :-)

--- End quote ---

 Yeah, I forgot it as well and had to look it up in his book. :o

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