Placement of heated O2 sensor

[kleenair at ix.netcom.com]

dzorde wrote:
> 
> Howdy all,
> 
> A quick and simple question.  For a twin system, is it OK to fit a heated O2
> sensor in the balance tube of the exhaust system ?  Or will the exhaust
> gasses in this place not be a true indication of what is coming out (does
> the air stand still in this tube) ?
> 
> The reason for me asking is that its a lot simpler for me to fit the sensor
> in the balance tube rather than in one of the sides.  And the balance tube
> is less than 200mm after the extractors.
> 
> Dan     dzorde at geocities .com


I don't think it's the best set-up you could possibly have, but it does 
work.  Take a look at late '80s and early '90s ford vans with V8 engines. 
 O2 sensor was placed in a balance tube before the catalyst.

Best Regards, Mazda