first year for catalytic converters?
#1416558
04/08/13 09:28 AM
04/08/13 09:28 AM
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Joined: Dec 2006
Posts: 3,533 Indiana
Fury Fan
OP
master
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OP
master
Joined: Dec 2006
Posts: 3,533
Indiana
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I was always under the belief that cars (even copcars) got cats starting in 1975. Here's a 76, though. What's the deal??? this is teh 2nd 76 Nupe copcar clone that this guy has listed, and both of them have had this sticker. Kinda funny - all the work spent to do the repaint and left the underhood area brown. That's not a fun job, but with a weekend and some alum foil and a spray can it could've been painted black. http://cgi.ebay.com/ebaymotors/1976-CHRY...forcev4exp=true
Last edited by Fury Fan; 04/08/13 09:29 AM.
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Re: first year for catalytic converters?
[Re: Fury Fan]
#1416560
04/08/13 10:06 AM
04/08/13 10:06 AM
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Joined: Oct 2012
Posts: 1,106 Northeast
VincentVega
super stock
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super stock
Joined: Oct 2012
Posts: 1,106
Northeast
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To my knowledge, it's 75 when converters started being used. And it was not in all cases. There are no 1974 models with floorpan humps for converters - they all used previous years stampings, before converters were even on the radar. Starting in 75, cars got passenger side humps - B body: cordoba, coronet, fury, etc. Pretty sure F body is the same ('76 onward). Not sure about C body, but the had no cats in '74 either. Leanburn was clean enough in certain engines to not need converters in the late 70s. This fact is annotated and discussed in various places, including the service manuals. Option codes will say if the car is leanburn, catalyst, or leanburn + catalyst. My 400 cop car was a total dog... "high performance" 400 with single exhaust, cat converter, and leanburn Interestingly, cars with dual exhaust and dual converters (i.e. 440) had uber-special floorpans with double humps for the converters. they have their own part number. It's a testament to LB that they could do this, despite all the negativity surrounding the system
Looking for 1975 through 1978 B body 4 door sedan sheet metal or parts cars - monaco, fury, coronet. Please let me know
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Re: first year for catalytic converters?
[Re: Fury Fan]
#1416565
04/09/13 11:17 AM
04/09/13 11:17 AM
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Joined: Feb 2003
Posts: 8,020 Pangaea
B5 Bee
master
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master
Joined: Feb 2003
Posts: 8,020
Pangaea
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Truck cat convts depended on GVW. All trucks over a certain GVW were exempt. The GVW exemption was raised thru the years till all trucks used them. It was the main reason for the D150 model with it's increased GVW over a D100. Ford and Chevy also had versions of the 'heavy half ton'. 1979 had a change since a 78 D150 didn't have a cc and a 79 D150 did. In 1985, a D350 was still exempt. Remember the 'test pipes' that were sold to find out if you cc was plugged up? Most were never removed once the 'test' was over. The best solution was to gut the cc, run a new piece of tube thru it and weld the shell back on, it was there for appearances only.
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