RE: [alfa] Re: V6 headers and emissions

["kloliver" <kloli@xxxxxxxxxxx>]

Thanks for the responses.
The car does have a brand new 3 wire sensor (but does the sensor heater
still make the heat from the exhaust gases irrelevant?).  And yes, the
sensor is now only looking at the exhaust gas from one bank of cylinders.  I
picked flowmaster cats at a rating based on engine displacement (per the
exhaust shop) - they are actually oversized vs a 2.5 L.
Have had a couple other suggestions around O2 sensor functionality so need
to check those out as well.

Just wondering if anyone else had similar experience when installing
headers.

Thanks,
Kevin

> If I understand right the sensor is only getting the exhaust and heat from
one bank
> of cylinders? If so it seems natural that it would take much longer to
reach operating
> temp, if at all. I also wonder about the catalysts. There are lots of
varieties of cats so
> I hope the seller had experience with your car.

>>later GTV-6s switched to the now-ubiquitous 3 wire sensor, i think, which
was
>>standard on all milanos. the 2 extra wires are for a heating element so
that
>>the sensor comes to temp quicker and stays there. if the car doesn't
already
>>have a 3 wire sensor, would switching to one possibly help?

richard
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