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Sep 21, 2008 | 09:06 PM

presasa

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Heel & Toe

Joined: Feb 2008

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C4 headers

I am installing headers on my 85 Corvette and plan to do away with the emmission system. How do I bypass the oxygen sensor and can I do away with the emmission pump. The alternator is mounted to it. Thanks in advance for the help.

Sep 21, 2008 | 09:08 PM

BornIn87

Pro

Joined: Dec 2005

Posts: 507

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From: Wilson NC

they make a smog pump delete bracket and pulley.. all suppliers sell it. also dumps about 20 pounds of worthless weight.

Sep 21, 2008 | 09:10 PM

BornIn87

Pro

Joined: Dec 2005

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From: Wilson NC

if u dont mind me asking... what headers did you go with?

Sep 21, 2008 | 09:36 PM

presasa

Thread Starter

Heel & Toe

Joined: Feb 2008

Posts: 24

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Quote:

Originally Posted by BornIn87

if u dont mind me asking... what headers did you go with?

I appreciate the help - I went with long tube Headman Headers. Easy to install.

Sep 21, 2008 | 11:56 PM

vader86

Team Owner

Joined: Sep 2001

Posts: 62,146

Likes: 1,730

From: Athens AL

C7 of the Year - Unmodified Finalist 2021

C4 of Year Finalist (performance mods) 2019

Buy the AIR delete bracket and use that.

You cannot bypass the O2 sensor, it MUST be installed.

Sep 22, 2008 | 07:59 AM

Muffin

Race Director

Joined: Jun 1999

Posts: 14,924

Likes: 9

From: Merritt Ils Fl

What vader said. Without the 02 sensor a proper tune is next to impossible.

Sep 22, 2008 | 10:29 PM

presasa

Thread Starter

Heel & Toe

Joined: Feb 2008

Posts: 24

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Quote:

Originally Posted by vader86

Buy the AIR delete bracket and use that.

You cannot bypass the O2 sensor, it MUST be installed.

thanks Vader - the headers dont have a place for the 02 sensor, can i put the 02 sensor on the reducer after the header.

Also - what about the air valves that the smog pump attach to - can I remove those too?

Sep 22, 2008 | 10:36 PM

vader86

Team Owner

Joined: Sep 2001

Posts: 62,146

Likes: 1,730

From: Athens AL

C7 of the Year - Unmodified Finalist 2021

C4 of Year Finalist (performance mods) 2019

Yes you can put the O2 bung in the collector. If its that far away, it could need to be a Heated O2 sensor (has a 3rd wire to a 12v source).

Anything with the AIR pump can be done away with entirely.

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Sep 22, 2008 | 10:45 PM

presasa

Thread Starter

Heel & Toe

Joined: Feb 2008

Posts: 24

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Quote:

Originally Posted by vader86

My concern is that there is a sensors in the air valve - will I get a check engine light? I also have a vacuum hose going to on of the air valves - just cancel it?