Re: Retrofitting a 02 sensor

["Christian Els" <tiAn@usiw.net>]

Mark,

You will want to weld a bung onto the downpipe as otherwise the sensor tip
will be against or through the far wall of the pipe. It cost me $10 to have
the local Muffler King weld one on mine, off the car.

You could prolly get away with tapping a hole in the manifold, if you are
using a cast piece and not headers.

If you do not install a three wire sensor, you'll want to mount it as close
to the head as possible to keep the operating temperature up.

Cheers,

Christian Els
1987 Scirocco 16V

----- Original Message -----
From: "Marc Peterson" <mpeters6@rochester.rr.com>
To: <scirocco-l@scirocco.org>
Sent: Friday, 14 December, 2001 10:35
Subject: Retrofitting a 02 sensor


> I'm starting to gather parts for my JN block/JH head conversion, and was
> wondering about the O2 sensor.  I'm going to be using my existing CIS
> (non-lambda) and currently I have no way monitor a/f ratio.  So, I want to
> install a O2 sensor that I can monitor with a meter and/or guage.  What I
> was wondering is if I could drill and tap a hole in my downpipe.  I was
> thinking about using the area near the bend at the bottom where the 2->1
> transition is.  Do you think there is enough metal there for the sensor to
> bite on, or do I need to get a nut welded on there?
>
> Thanks, Marc
>
>
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