Oxygen sensor too short after SSI install
 

On my 81 SC the OS was further upstream in the exhaust than it is with the new SSIs. Do I need to just splice wire into it for the extra length or is there some kind of extension made?

Splice the wire but please don't use electrical tape. On a side note, hold old is your O2? This may be a good time to replace it.

The wire on Bosch sensors is a Mil-spec Type EE AWG 20 ga Teflon-insulated, silver-plated copper stranded wire. Splices should be soldered or crimped with a non-insulated termination covered with a piece of HD shrink-wrap.

Do NOT be tempted to use an ordinary piece of PVC-insulated wire, as it won't stand up to temperatures in the vicinity of the exhaust system!!! It will char and crack ... leaving the bare wire subject to shorting out!

http://www.alliedelec.com/catalog/pf.asp?fn=393.pdf&Catalog=&PageNum=393

If you have an old oxygen sensor laying around on a shelf ... you can salvage the wire from it.

ps .... link fixed

The link didn't work.
Also is this a 2 wire sensor?
Does anyone make an extension?
Finally what did all the others who added SSIs to their SC do?

As far as I know, there is no such thing as an extension. Also, when I purchased a new O2 sensor I found the wire to be more than long enough (I have B&B headers, not SSI so I don't know if there is a difference).

On the original cat the OS was directly below a hole in the tin which it went through with a plug. Now the OS bung is at least 6-8 inches to the rear. I bought a new OS last year so I don't want to invest in another.

No extension that I know of.
The factory wire is a coax and only the inner wire is used for signal. If you splice to the outer wire it will not work.

There must be SC owners who installed SSIs. Please sound off on this.

well Mine use to be the same set up as you. I bought the universal single wire bosch O2 and they provided the butt connector. cost 30 bucks.. Hope this helps

By the "butt connector" do you mean the part that plugs in on the left side of the engine compartment? Was the wire longer than the original one? How much is the universal Bosch OS?

No it connected to the factory o2 sensor wire. Not the harness side. it cost 30 bucks wire was plenty long. I may even still have it I can look

Thanks. So this connects to the connector that is at the harness end of the sensor?

no It connects to the original o2 sensor plug. you need to cut that off the original sensor and butt connect to the new longer bosch uni O2

The butt connector can't be PVC insulated though, can it?

it is supplied with the bosch O2 so it is what is suppose to be there

I've been told the wire is coaxial. I guess the supplied connector works for that.

rs6er,

The 911SC oxygen sensor is a single wire design, and it isn't coaxial! Whether OEM or universal ... the wire is stranded, Teflon-insulated as described above. The Bosch 11027 universal single-wire sensor is $21.49 at NAPA, and comes with the butt-splice connector already attached to the Teflon wire, and a piece of nonflammable polyolefin shrink wrap to cover the splice.

Warren-
Than's for that info. That is what I've been needing all along. Bless you!
John

The Bosch 11027 has about 2 1/2" of wire on it. No way is that going to help me reach from the SSI to the plug inside the engine compartment.

john can you post a pic of exactly what you have that would make it much easier. I guess I am baffled as it was a pretty simple conversion but I also may have forgotten it has been a while. Not trying to be a dic@ !!!!!!!!! Just not sure what exactly you have and the pic would us help you out