Quadrajet Problem Solving > Quadrajet Parts and Numbers
66 Toronado Carb ID - Help!
Kenth:
Info from Jon Hardgrove @ thecarburetorshop:
Casting (raised) numbers: Raised numbers appearing on various castings are so-called "casting" numbers. These numbers were used by Rochester to identify a casting "blank" PRIOR to machining. A casting could be machined into different parts. IT IS IMPOSSIBLE TO IDENTIFY ROCHESTER CARBURETORS FROM CASTING NUMBERS ALONE!
Unfortunately this is true.
And, part numbers in the Delco manual are spare part numbers on assembled units with parts attached. Not only the separate air horn, float bowl or throttle plate.
HTH
ourkid2000:
--- Quote from: Kenth on March 02, 2023, 02:09:45 AM ---Info from Jon Hardgrove @ thecarburetorshop:
Casting (raised) numbers: Raised numbers appearing on various castings are so-called "casting" numbers. These numbers were used by Rochester to identify a casting "blank" PRIOR to machining. A casting could be machined into different parts. IT IS IMPOSSIBLE TO IDENTIFY ROCHESTER CARBURETORS FROM CASTING NUMBERS ALONE!
Unfortunately this is true.
And, part numbers in the Delco manual are spare part numbers on assembled units with parts attached. Not only the separate air horn, float bowl or throttle plate.
HTH
--- End quote ---
Okay......that makes absolutely no sense. How do they determine what parts they have when they're manufacturing the carbs??
Kenth:
It is a production technical question that can only be answered by Rochester.
But I'm sure they had a system that worked as they were able to produce more than 15000 one, two and four barrel carbs daily.
ourkid2000:
I'd love to have that picture on my wall......great snap!
Shiny:
--- Quote from: Kenth on March 02, 2023, 02:09:45 AM ---Info from Jon Hardgrove @ thecarburetorshop:
Casting (raised) numbers: Raised numbers appearing on various castings are so-called "casting" numbers. These numbers were used by Rochester to identify a casting "blank" PRIOR to machining. A casting could be machined into different parts. IT IS IMPOSSIBLE TO IDENTIFY ROCHESTER CARBURETORS FROM CASTING NUMBERS ALONE!
Unfortunately this is true.
And, part numbers in the Delco manual are spare part numbers on assembled units with parts attached. Not only the separate air horn, float bowl or throttle plate.
HTH
--- End quote ---
This makes sense to me. When chasing my Frankencarb I was told differently and it added confusion.
I expect a single casting was "customized" for multiple applications. Once assembled, the physical tracking would have to be stamped or otherwise tagged if it was intended to be "traceable". The castings are indeed stamped, which to me is the likely "sub-assembly" number. For example, I expect the same airhorn casting could have different nozzles or DCRs installed, then stamped to differentiate.
But I never found a source for decoding the stamped numbers...
Kenth - do you catalog these stamping numbers? Is there any pattern to them?
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version