ID a Carb ?

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Jul 12, 2009 | 10:37 AM

c6vetteowner

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Burning Brakes

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ID a Carb ?

Where is the id numbers on a Rochester 4 Jet Carb ? And what do they mean ? Thanks

Jul 12, 2009 | 10:41 AM

62Jeff

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From: Conroe Texas

Howdy,
This web site has info on identifying the Rochester carbs. It may help you get started in the general direction.
http://www.thecarburetorshop.com/Car...tm#IDRochester

There may be a triangular brass-colored tag attached to one of the screws on the upper carb. This tag would have numbers embossed in it which serve to identify it's use.

Jeff

Jul 12, 2009 | 11:44 AM

c6vetteowner

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Burning Brakes

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Quote:

Originally Posted by 62Jeff

Thanks it has the triangular Tag that reads 70190 as best as i can make out

Jul 12, 2009 | 11:50 AM

rongold

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From: Putnam Valley, New York. Amateur Radio Operator K2NS

Carb number

Quote:

Originally Posted by c6vetteowner

Thanks it has the triangular Tag that reads 70190 as best as i can make out

It's got to have 7 numbers in it. Look a little harder.

RON

Last edited by rongold; Jul 12, 2009 at 12:22 PM.

Jul 12, 2009 | 12:19 PM

c6vetteowner

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Burning Brakes

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It may be 7019014 but its very hard to make out the second to last number , Then on the bottom of the tag it reads 01 07 This card sits on a 58-61 manifold 3746829 , Does this help

Jul 12, 2009 | 12:21 PM

62Jeff

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From: Conroe Texas

Quote:

Originally Posted by c6vetteowner

It may be 7019014 but its very hard to make out the second to last number , Then on the bottom of the tag it reads 01 07 This card sits on a 58-61 manifold 3746829 , Does this help

This web site http://www.chevymania.com/partsid/ca...er&model=4-brl says that carb number is 59-61 passenger car.

Note: That web site is not a comprehensive listing of Rochester carbs, it appears to be focused on Chevy applications and is, for example, missing the 7007221 carb used on my 1956 Oldsmobile.

Jul 12, 2009 | 12:28 PM

rongold

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From: Putnam Valley, New York. Amateur Radio Operator K2NS

Quote:

Originally Posted by c6vetteowner

It may be 7019014 but its very hard to make out the second to last number , Then on the bottom of the tag it reads 01 07 This card sits on a 58-61 manifold 3746829 , Does this help

If I remember correctly, the 4th digit denotes the model year that the carb was used on. Yours is a "9", denoting 1959. You say that the manifold is a 1958-61, so the 1959 makes sense. There must be a chart somewhere on the web that will decipher the "014" and tell you what the original application of the carb was, but where to find it, I don't know. One thing I do know, is that Rochester 4 jet (4G, 4GC, and 4GV) carbs were NEVER used on Corvettes. They were however used on the rest of the Chevrolet line and all other 4 divisions of GM.

RON

Jul 12, 2009 | 12:36 PM

62Jeff

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From: Conroe Texas

Quote:

Originally Posted by rongold

If I remember correctly, the 4th digit denotes the model year that the carb was used on.

Hi Ron,
I had not heard that, but the correct carb for my 56 Olds has a 7 in the 4th digit, so at least for Oldsmobile, that rule would not apply.

Jeff