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Join Date: Oct 1999
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78/79 SC emissions systems?

I've always thought that the 78 and 79 SC's had a CAT but not an oxygen sensor. And of course they had the 'smog' pump.

In 80, they used a different CAT with an Oxygen sensor. No smog pump.

However,

A friend that usually knows what he's talking about is adamant that the 78/79 SC's did NOT have a CAT or an oxygen sensor.

Is he correct? I haven't been able to pull it up on a search and don't have an early SC in the garage.

Anyone know?

Thanks.

Old 05-21-2010, 03:33 PM
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Mike Holbrook
 
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Location: Meridian, ID
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My 79 has a cat but no 02 sensor. Also as a California car, it was equipped with the smog pump. In 1980 they changed to a cat with an 02 sensor through the rest of the SC years.
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1979 911SC Targa
Old 05-21-2010, 04:02 PM
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The ROW SCs came with the premuffler and no 02 sensor but a smog pump.
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Old 05-21-2010, 05:40 PM
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gearhead
 
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According to both Anderson's book and Paternie's redbook, 1978-79 had a cat for US models (49 state) and EGR was added for CA. The O2 sensor was definitely a 1980 addition.

930/03 78-79 ROW 911sc engine no cat
930/04 78-79 49 states with cat
930/05 78-79 Japan, same as ROW
930/06 78-79 CA with cat and EGR
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Old 05-21-2010, 05:42 PM
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Thanks, Matt.
Old 05-21-2010, 07:00 PM
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Quote:
Originally Posted by Matt Monson View Post
According to both Anderson's book and Paternie's redbook, 1978-79 had a cat for US models (49 state) and EGR was added for CA. The O2 sensor was definitely a 1980 addition.

930/03 78-79 ROW 911sc engine no cat
930/04 78-79 49 states with cat
930/05 78-79 Japan, same as ROW
930/06 78-79 CA with cat and EGR
My 79 California market car has EGR, pump and cat.

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Old 05-21-2010, 11:07 PM
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