Carb Question
Thread Starter
Pro
Joined: Feb 2006
Posts: 529
Likes: 0
From: Waco TX
Carb Question
I need to find a mechanical secondary Q-jet for my 72 BB 4-speed car. I will likely break down at some point and pay major $ for the correct carb.
In the meantime, I am interested to know if anyone is aware of other GM cars/trucks that would have had a comparable carb.
My thought is that I would run the non-correct carb on the car and set the major $ correct carb aside.
In the meantime, I am interested to know if anyone is aware of other GM cars/trucks that would have had a comparable carb.
My thought is that I would run the non-correct carb on the car and set the major $ correct carb aside.
Drifting
Joined: Sep 2004
Posts: 1,959
Likes: 1
From: North Bend Ohio
I don't know... going to be tough to find a mechanical secondary Quadrajet. They only made about a hundred million of them. ALL Quadrajets are mechanical secondary carburetors.
BigBlockk
Later.....
BigBlockk
Later.....
Tech Contributor
Joined: Aug 1999
Posts: 14,380
Likes: 6,390
From: At my Bar drinking and wrenching in Lafayette Colorado
BigBlockk is correct - All Q-Jets are mech sec carbs.
Your 72 setup, if you want to keep you choke system operable and correct, has the limitation that you need to find a '68 through '74 Chevy Q-Jet. You can use any car or truck Q-Jet in this year range, with the '70-74 being the most versatile and reliable. These will interface with our choke linkage and throttle linkage without problem. Find a carb that has not been commercially rebuilt (commercial rebuilt carbs are real junk). Go through it and set it up to its stock correct jetting specs. It will run great.
Your 72 setup, if you want to keep you choke system operable and correct, has the limitation that you need to find a '68 through '74 Chevy Q-Jet. You can use any car or truck Q-Jet in this year range, with the '70-74 being the most versatile and reliable. These will interface with our choke linkage and throttle linkage without problem. Find a carb that has not been commercially rebuilt (commercial rebuilt carbs are real junk). Go through it and set it up to its stock correct jetting specs. It will run great.
Racer
Joined: Mar 2006
Posts: 366
Likes: 1
From: Houston Texas
Keep an eye on eBay. I was able to find a carb with the correct date code for my 76 in roughly 2 months. It was in good shape and a rebuild based on lars' papers and a kit from oreilly's has it running beautifully.
