[Healeys] Acceptable CO

[David Porter]

This is interesting, but isn't HC level the level that ultimately determines
the CO level? My '54 doesn't seem to have a CO adjustment.. ;~)
dave

frogeye at porterscustom.com

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-----Original Message-----
From: healeys-bounces at autox.team.net [mailto:healeys-bounces at autox.team.net]
On Behalf Of Richard Ewald
Sent: Friday, July 06, 2012 10:41 AM
To: Richard Kahn
Cc: Healey List
Subject: Re: [Healeys] Acceptable CO

Two percent is natural?  I would love to see a cite for that.  According to
Wikipedia on CO air contains about 0.1 part per million by volume.  OSHA
limits long term exposure to 50 PPM  Both of these numbers are way way
below 2%
A CO meter is zeroed at ambient air, which might have a couple of PPM.
 Back in the day when I did smogs, I worked in a shop next to a very busy
freeway.  The air was not quite as pure as I would have liked, and several
times I did smogs that showed negative CO from the exhaust on modern cars.
At sea level, the cars with SU I have set up are most happy at about 6.5-7%
CO at idle.  I would expect similar results at altitude.
Rick

On Fri, Jul 6, 2012 at 8:55 AM, Richard Kahn <tahoehealey at hotmail.com>wrote:

>  One exhaust pipe reads 4%, the other almost 5%. two percent is natural to
> the atmosphere at sea level. I'm not sure what it is at 6500 ft but the
> instrument is "trued" to 2% befor using. I guess that is rich mixture but
> it runs great.
> Richard Kahn
>
> ------------------------------
> Date: Thu, 5 Jul 2012 11:19:34 -0700
>
> Subject: Re: [Healeys] Acceptable CO
> From: richard.ewald at gmail.com
> To: tahoehealey at hotmail.com
> CC: healeys at autox.team.net
>
>
> What percentage CO do you have currently?