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Carburetors Carb discussion and questions. Upgrading a Third Gen carburetor, swapping TBI to carburetor, or TPI to carburetor? Need LG4 or H.O. info? Post it here.

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Old 02-10-2005, 02:57 AM   #1
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Car: 1984 Z28 Hardtop / 1988 IROC T-top
Engine: 383 Carb / 305 TPI
Transmission: 4L60 / T-5
Axle/Gears: 3.54 Dana 44 / 3.08 10 bolt

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Canadian Carbured Emissions

I've been looking in some old dealer brochures lately, and I've noticed some interesting things with respect to the availability of the CCC system on Canadian cars.

The 2.8L 2bbl V6 LC1 was not available with CCC.

The 5.0L 4bbl V8 LG4 was non-CCC, with CCC being available at extra cost on Sport Coupes only. It was unavailable on the Berlinetta and Z28.

The 5.0L 4bbl V8 L69 was only available with CCC.

A CCC LG4 will also have RPO <b>NB1 - Emission System, Closed Loop</b>, instead of NM4 - Emission Control, Non Closed Loop (Export). Both of them should also have NM5 - Emission System, Canadian Requirements.
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Old 02-10-2005, 10:05 AM   #2
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Car: 82 Berlinetta(2)/57 Bel Air
Engine: 86 LG4-> ZZ3(LS1)/mild 396
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Sticky material.

Thanks for posting that.
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Old 04-21-2005, 12:52 AM   #3
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Car: 1984 Z28 Hardtop / 1988 IROC T-top
Engine: 383 Carb / 305 TPI
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Axle/Gears: 3.54 Dana 44 / 3.08 10 bolt

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Representative vacuum routing diagram for non-CCC LG4s
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Old 04-19-2006, 02:04 PM   #4
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A friend at work has an 83 Firebird LG4 with CCC (vin H). My wife's 83 T/A does not have CCC (vin H).
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Old 07-03-2007, 02:14 AM   #5
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Re: Canadian Carbured Emissions

hey there, on your wifes 83:

if you ever have a chance to, could you please post the vertically stamped numbers on the carb body/casting

and also the distributor stamping numbers too ??


i want to know just to know for personal codes/numbers learning/records keeping

that would be freaking awesome thanks!
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Old 07-30-2007, 02:36 PM   #6
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Re: Canadian Carbured Emissions

I'll have to dig up the documentation and dealer order sheets for my 1983 Z28... Mine was factory ordered and I'm pretty sure that the CCC system could be ordered on all LG4 cars that came to Canada though very few were optioned that way.

I remember the salesman talking about it... and talking us out of this option...

Last edited by ur7x; 07-30-2007 at 02:39 PM.
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Old 01-23-2008, 11:49 AM   #7
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Re: Canadian Carbured Emissions

I dug out my old Canadian Dealer books and
The CCC option WAS avalible on all LG4 engines in Canada in 1982 and 1983 (PRO code NBI) it was an extra cost option, did not increase performance and was rarely (if ever) ordered
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Old 11-12-2008, 11:23 PM   #8
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Re: Canadian Carbured Emissions

My 85 T/A bone stock 305 non CCC w/700R4. Atleast I dont think its CCC the only wire to the carb is for the choke. What appearance differences are there between the two? Distributer?
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Old 08-19-2009, 04:52 PM   #9
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Re: Canadian Carbured Emissions

Hate to sound stupid but what is the ccc system? I have an 85 z28 original 305 4bl and looking to rebuild the stock carb. Is the ccc system something I have to worry about?
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