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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: BIG CHEVY on March 08, 2012, 10:59:20 am

Title: quadrajet numbers
Post by: BIG CHEVY on March 08, 2012, 10:59:20 am

can someone tell me about these numbers? i got an old quadrajet for free and ive never ran numbers. in case pic doesnt work......they are.........17085292......0596......HMJ.(http://i1223.photobucket.com/albums/dd519/BIG-CHEVY/CAMARO%20PICS/th_2012-03-08114800.jpg) (http://s1223.photobucket.com/albums/dd519/BIG-CHEVY/CAMARO%20PICS/?action=view&current=2012-03-08114800.jpg)

Title: Re: quadrajet numbers
Post by: 454Man on March 08, 2012, 11:22:53 am

1708= 80 and up
5= is the last numeral of the application year
2= federal/ non cali app which is good
9= chevy
2= automatic trans


 http://www.carburetion.com/CarbNumber.asp?Number=17085292
This site is also where you can type in a qjet number and find out what year and car/ truck it goes to. :)

Title: Re: quadrajet numbers
Post by: BIG CHEVY on March 08, 2012, 05:14:23 pm

What is 0596?
What is HMJ?

Title: Re: quadrajet numbers
Post by: 454Man on March 08, 2012, 06:11:54 pm

To be honest idk. Maybe someone else will chime in. If you were gonna use this carb by it self with out a computer... id stick with a pre 76

Title: Re: quadrajet numbers
Post by: jaredts on March 08, 2012, 07:05:49 pm

Pre '76 carb.'s are largely divorced choke setups, which I'm not a fan of.  As long as it doesn't have a fuel mixture solenoid and tps on it, any quadrajet can be made to do what you want.  I prefer the electric choke over divorced or hot air tubes.  Metering rods, jets, and secondary spring hangers are all changed easily enough if it wasn't configured exactly how you want.  My opinions only of course.

Title: Re: quadrajet numbers
Post by: 454Man on March 08, 2012, 07:08:53 pm

Sorry I ment to say pre 77.  My choice is 76. Its perfect for my daily driving

Title: Re: quadrajet numbers
Post by: bd on March 08, 2012, 08:54:25 pm

Quote from: BIG CHEVY on March 08, 2012, 05:14:23 pm

What is 0596?
What is HMJ?

As I recall, "0596" is the date code of the carb build: "059" is the 59th day of the year the carb was built, "6" is the year the carb was built, in this case, 1986.  "HMJ" is a production code.  The most important ID is the carb number, 17085292.  Using the proper Rochester reference (which is probably out of print) the carb number will reveal the full calibration, adjustment specifications, and vehicle application data.