Decoding your Buick Rochester Quadrajet

The number is vertically stamped on the back of the drivers side of the carburetor -

http://www.teufert.net/carbs/buick.htm

Decode almost any quadrajet -
http://www.atlantabuick.com/Specs.htm#QuadraJet ID Chart

 

Thanks Marco

Thanks a bunch, I had no idea that site was available.
Len

 

7041242

I have a stage 1 q-jet! what dos the 18 18 stand fore,these #s are just below the 7041242 #?:grin:

 

You are almost there

1818 would mean the carb was manufactured on the 181 day in the 1978 calender year. You have a Stage 1 over the counter replacement carb. If it was made and installed at the factory, the last number would be either a "0" (for early 71 model) or "1" for late model 71. There would also be a two letter code that followed the 7041242. The two leter code changed each year and would have a "MD". The carb was supplied with the 71 Stage 1 specs. Dan:Smarty:

 

Thanks Dan

I didn't figure it was a factory original,thanks for decoding it for me!!:grin: MOZ

 

What size, in CFM are the Q-Jets for 455 engines?

 

750 cfm through 70, 800 71-up

 

Need QuadraJet 7041242

Hello,

o No: I am looking to buy a QuadraJet #7041242 for a 1971 455 Stage 1 engine.

Thanks
George

 

Second link is a dead one??

 

Yep. I guess things change after 3.5 years. o No:

 

Needed your reply to find out the date on the first couple of posts :sleep:

Should have been alarmed by "atlantabuick" in the link.....
:TU:

 

If you are looking to buy a correct Stage-1 Carb try www.blake.com/oemcarbs/ They are expensive but you are not going to find a correct number Stage-1 carb cheap.

 

Should have been alarmed by "atlantabuick" in the link....

AtlantaBuick was back up, operational and upgraded within the last 6 months. it seems like it comes and goes somewhat infrequently. i know it's been 'up' at least two different times since i registered here.

 

Should have been alarmed by "atlantabuick" in the link.....
:TU:[/QUOTE]

Ouch...............All you have to do is ask.................

 

I might trade you one for the right 2016 distributor.

 

What is the going rate for a completely/correctly rebuilt/restored 7041242 carburetor?

We just got one in, and will be restoring and selling it soon.....Cliff

 

Thanks for the link!!!!!!!!!! I copied it. VERY valuable info!!!! I'm looking for a 7040240 carb for my 70 GS455. My car was built 2nd week of September 69. THANKS!!!

 

7040240, I had a couple of those in the core pile, will take a look today to see if we still have them?....Cliff

 

Cliff the 71 Stage-1 7041242 goes for a bit less than the 70 Stage-1 carb. Maybe about $400-500. What is the date code on it? I have a 7041242 that was NOS (1974 build)and is little used if you would consider somekind of partial trade?

 

I found the following carbs this morning, here are the numbers:

7040240 3249
7040247 2419
7041242 2180

We don't sell cores, all units are completely/correctly rebuilt, with zinc/chromated casting and plated small parts.

Anyone interested in any of these units, we can be reached thru our website at: cliffshighperformance.com

Sorry, couldn't post a link, not enough responses to date.

Our email and shop phone number are listed on the site...thanks...Cliff