Decoding a Q-Jet

generally i know how to decode stuff, but one number has got me confused on this one. Can some Q-jet Gurus chime in? Its a chevy style carb, where the fuel line port is at the front facing passenger side of engine.

As i read it.

1708 1282
2730 DKD

Top to Bottom, left to right;

1708---> Later series 1980s
1----> Year produced, in this case 1= 1981
2 ---> Quadrajet (4 bbl) Federal standards
8 ----> ??????? I thought it may be a 3, for cadillac, but i posted a pic, judge for yourself.
2----> EVEN NUMBER meaning Auto Trans.

273 ---> 273rd day of the year
0---> Year
DKD---> Production Plant Code

 

Don't Know, Some Options Could Be Motorhome Or Chrysler Q-jet. Good Luck

 

Yea, its a tough one! Didnt know Chryslers had Q-Jets...

 

Rochester R-4 17081282 81-86 Chev/GMC/Truck OP 64-7160

 

Qjet ID

Here's a site that may help: :beer :TU:
http://www.carburetion.com/Number/oemnumber.asp

 

Thanks Jim, what do you mean by OP 64-7160? Was gonna order a rebuild kit for it, just thought id make sure!

 

Man you sure want to rebuild that nasty smog carburetor? You can buy a core cheap, and just rebuild that.

(If you are rebuilding your truck's carb, please disregard this post) :error: ou:

 

Actually id love some advice on what to build. I know these are cheap, and ive picked up a few tricks to make them reliable and quick. I was just enthusiastic about this one cuz it ran nice when the engine was in the car. How do you know its smog? And whats a better year range for a carb? Gonna be going on a bored over 350 (chev, sorry).

 

You will be fine with a carb coded from 1971- back. Since you are building a Chevy, though, anything will be fine...

just kidding.

 

I did not want to start a topic like this over, but I have a question, when you find out all the info like I did on mine, and like you all did here.. How do you know the CFMs or how can you find them out?

here is my numbers..

7042240 MB 2241 & 7042240 MB 2171

Both of these are 72 Buick 455 Auto trans carbs... how to find the CFMs..

any help would be great..

 

I think the q-jets were all rated at 750-795 cfms. The primaries arent that big, only around 200 or so, but the secondaires more than make up for it. Its really a variable cfm carb, it will only give the engine what it asks for, which is why its such a versatile carb.

 

All Buick 455 carburetors starting in 1971 were 800 CFM.

 

thank you very much marco..

 

Just to add some more info, following 71, some of the other GM divisions had 800 cfm Q-jets on their big blocks too. Otherwise, all Q-jets are 750 cfm. No mysterys...