AIR smog pump?

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May 21, 2021 | 08:10 AM

Legend73

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From: Montgomery Alabama

AIR smog pump?

Did every 1973 Corvette made have the AIR smog pump from the factory? Thanks!

May 21, 2021 | 09:33 AM

PJO

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The answer is yes.

May 22, 2021 | 06:37 AM

4-vettes

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I find that interesting, as my 77 certainly did not have a air pump factory.

May 23, 2021 | 01:08 AM

7T1vette

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All 1973 cars had an AIR pump. Later cars had catalytic converters.

May 23, 2021 | 01:28 AM

SEVNT6

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Quote:

Originally Posted by 4-vettes

I find that interesting, as my 77 certainly did not have a air pump factory.

In '76 the L48 came without a pump, the L82 with.
I think '77 was the same...

May 23, 2021 | 01:43 AM

4-vettes

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That sounds about right. funny they need an Air pump on earlier cars without a Cat. learn something new everyday.

May 23, 2021 | 06:00 AM

hunt4cleanair

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From: Myrtle Beach SC

Quote:

Originally Posted by 4-vettes

That sounds about right. funny they need an Air pump on earlier cars without a Cat. learn something new everyday.

Emission control technologies evolved until engineers figured out to restrict emissions and meet federal requirements. In 1975, Chevrolet was challenged to get the L82 certified so with Corvette, they moved forward with certification for the L48...and why L82s were not built until early 75. The catalytic converter became the most effective method to manage exhaust emissions and yes, permitting the limited use of A.I.R. in lower horsepowered motors as we see in 77, 78, etc. Many of these emission control methods were mechanical solutions until engineers figured out how to use computer technologies to manage emissions with precise air/fuel ratios that combusted without unspent fuel being emitted into exhaust that depended upon Cat converters to further combust/manage unspent fuel.

In effect, late model C3s became the test mules for emission control that permits later Corvette generations to produce high-performance motors and still manage emissions.

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