Portable A/F (CO) Meter

[Chris Wilson]

In article <58638 at isham-research.demon.co.uk>, Phil Payne wrote:
 
> Any good tips for a portable CO meter for a non-cat car?
>  
> Gunson in the UK make a cheap one, but the output is best used for
> picking lottery numbers.  Others that I've seen are hideously $$$$.
>  
> I'm investigating fueling problems in an ur-quattro (MB engine) at
> high revs.  One of the options is to fit a downpipe with an OXS sensor
> boss - but I usually run on leaded fuel and this has a habit of
> destroying said sensors.  One 'expert' I spoke to said that some
> Volvos were at one time fitted with lead-tolerant OXS sensors.  Any
> truth.  Or any part numbers??


99% of CO meters don't like the exhaust gas flow and volume at WOT.To 
get a rapid and meaningful read out of CO,you need to use a Bosch 
Motorsport Lamda sensor.They are *very* expensive,and the hardware to 
display the changes are similarly expensive.Whole package circa £6K

The Motorsport senders are fairly lead tolerant.We regularly run race 
engines on these sensors,and they are often on Avgas,which has plenty of 
lead in it.Sensors usually last at least 6 months,on an engine 
dyno.Never seen one used on a rolling road,but most of our development 
is engine dyno based....

Does it *have* to be portable?Can't you get the problem to occur on the 
rollers?
>  
> --
> Phil Payne
>



-- 
               Best Regards,
                        Chris Wilson.
              http://www.maximum-bhp.u-net.com