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canna change law physics
 
red-beard's Avatar
 
Join Date: Jul 2000
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Question Home Version - O2 and CO testers???

Are there any affordable "home" versions of these testers? A lot of the final adjustments on the carbs on my 914-6 call for certain CO levels. And I know looking at O2 levels can tell you what is going on with the mixture.

Has anyone seen anything like this?

James
Old 03-14-2002, 08:18 PM
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canna change law physics
 
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Found my own answer:

JC Whitney has one for $169....

James
Old 03-14-2002, 09:03 PM
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Eduardo Castrejón Elbjorn's Avatar
 
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summit -nrd-m7009- Nordskog airfuel ratio gauge = $29.95
Universal 02 sensor you can buy a new one on ebay for less than $15
Then you can have your airfuel ratio meter for $45.00
Exist a lot of brands, edelbrock, k&n, autometer,etc

Is a great tool for the webers, I use it on my race car. very useful.

Here in pelican tech articles, teach you to make one !
http://www.pelicanparts.com/techarticles/mult_air_fuel_monitor/mult_air_fuel_monitor.htm

Last edited by Eduardo Castrejón Elbjorn; 03-14-2002 at 09:55 PM..
Old 03-14-2002, 09:50 PM
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Be aware that the less expensive CO meters that are based on O2 sensors have poor accuracy for A/F in the range from 12:1 to 13:1. Check the following article for more information:

http://www.autospeed.com/A_0618/P_3/article.html

Since this is the mixture range that corresponds to full-load, errors in settings here can have serious effects.

The least expensive highly accurate CO method is based on IR dispersion. You can find used IR dispersive testers on Ebay for anywhere from $200 to $350. These testers usually also measure HC directly, too.
Old 03-15-2002, 01:22 PM
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canna change law physics
 
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Follow up:

The CO meter arrived Friday and I put it to use on Saturday.

Interesting: I started out at about 18% CO. I screwed in the mixture screws and was able to get down to 2.5 % CO after a few iterations. I then drove it around a bit and rechecked. The CO was reading very low so I opened up the mixtures screws about 1/8 of a turn.

Car runs very nice now! Feed back is good! As a plus, I could probably pass the smog test if I was feeling like a masochist...

James
Old 03-24-2002, 07:16 AM
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