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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?
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John Original owner '81 911SC blackmetallic coupe. Terbatrol, SSI, M+K Gen 4, SC+ cams, A/C delete, console delete, heater backdate, 7 & 8 x 16 Fuchs with polished rims, Turbo tie rods, tensioner update, Rennline engine mount bar, Mainely Custom sump plate, new top-end, corner balance. |
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07-29-2006, 01:08 PM
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Make Bruins Great Again
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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.
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-------------------------------------- Joe See Porsche run. Run, Porsche, Run: `87 911 Carrera |
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07-29-2006, 01:33 PM
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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
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Warren Hall, Jr. 1973 911S Targa ... 'Annie' 1968 340S Barracuda ... 'Rolling Thunder' Last edited by Early_S_Man; 07-30-2006 at 06:08 PM.. |
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07-29-2006, 02:43 PM
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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?
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John Original owner '81 911SC blackmetallic coupe. Terbatrol, SSI, M+K Gen 4, SC+ cams, A/C delete, console delete, heater backdate, 7 & 8 x 16 Fuchs with polished rims, Turbo tie rods, tensioner update, Rennline engine mount bar, Mainely Custom sump plate, new top-end, corner balance. Last edited by rs6er; 07-29-2006 at 06:58 PM.. |
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07-29-2006, 06:06 PM
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Make Bruins Great Again
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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).
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-------------------------------------- Joe See Porsche run. Run, Porsche, Run: `87 911 Carrera |
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07-30-2006, 05:10 PM
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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.
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John Original owner '81 911SC blackmetallic coupe. Terbatrol, SSI, M+K Gen 4, SC+ cams, A/C delete, console delete, heater backdate, 7 & 8 x 16 Fuchs with polished rims, Turbo tie rods, tensioner update, Rennline engine mount bar, Mainely Custom sump plate, new top-end, corner balance. |
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07-31-2006, 05:30 AM
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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. |
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07-31-2006, 06:06 AM
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There must be SC owners who installed SSIs. Please sound off on this.
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John Original owner '81 911SC blackmetallic coupe. Terbatrol, SSI, M+K Gen 4, SC+ cams, A/C delete, console delete, heater backdate, 7 & 8 x 16 Fuchs with polished rims, Turbo tie rods, tensioner update, Rennline engine mount bar, Mainely Custom sump plate, new top-end, corner balance. |
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07-31-2006, 06:12 AM
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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
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Ben 89 944,85.5 944 914-6 2.4s GT tribute. 914-6werkshop.com |
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07-31-2006, 06:46 AM
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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?
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John Original owner '81 911SC blackmetallic coupe. Terbatrol, SSI, M+K Gen 4, SC+ cams, A/C delete, console delete, heater backdate, 7 & 8 x 16 Fuchs with polished rims, Turbo tie rods, tensioner update, Rennline engine mount bar, Mainely Custom sump plate, new top-end, corner balance. |
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07-31-2006, 07:06 AM
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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
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Ben 89 944,85.5 944 914-6 2.4s GT tribute. 914-6werkshop.com |
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07-31-2006, 07:15 AM
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Thanks. So this connects to the connector that is at the harness end of the sensor?
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John Original owner '81 911SC blackmetallic coupe. Terbatrol, SSI, M+K Gen 4, SC+ cams, A/C delete, console delete, heater backdate, 7 & 8 x 16 Fuchs with polished rims, Turbo tie rods, tensioner update, Rennline engine mount bar, Mainely Custom sump plate, new top-end, corner balance. |
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07-31-2006, 07:28 AM
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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
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Ben 89 944,85.5 944 914-6 2.4s GT tribute. 914-6werkshop.com |
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07-31-2006, 07:41 AM
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The butt connector can't be PVC insulated though, can it?
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John Original owner '81 911SC blackmetallic coupe. Terbatrol, SSI, M+K Gen 4, SC+ cams, A/C delete, console delete, heater backdate, 7 & 8 x 16 Fuchs with polished rims, Turbo tie rods, tensioner update, Rennline engine mount bar, Mainely Custom sump plate, new top-end, corner balance. |
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07-31-2006, 08:23 AM
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it is supplied with the bosch O2 so it is what is suppose to be there
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Ben 89 944,85.5 944 914-6 2.4s GT tribute. 914-6werkshop.com |
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07-31-2006, 08:42 AM
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I've been told the wire is coaxial. I guess the supplied connector works for that.
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John Original owner '81 911SC blackmetallic coupe. Terbatrol, SSI, M+K Gen 4, SC+ cams, A/C delete, console delete, heater backdate, 7 & 8 x 16 Fuchs with polished rims, Turbo tie rods, tensioner update, Rennline engine mount bar, Mainely Custom sump plate, new top-end, corner balance. |
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07-31-2006, 09:15 AM
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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.
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Warren Hall, Jr. 1973 911S Targa ... 'Annie' 1968 340S Barracuda ... 'Rolling Thunder' |
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07-31-2006, 09:59 AM
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Warren-
Than's for that info. That is what I've been needing all along. Bless you! John
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John Original owner '81 911SC blackmetallic coupe. Terbatrol, SSI, M+K Gen 4, SC+ cams, A/C delete, console delete, heater backdate, 7 & 8 x 16 Fuchs with polished rims, Turbo tie rods, tensioner update, Rennline engine mount bar, Mainely Custom sump plate, new top-end, corner balance. |
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07-31-2006, 10:27 AM
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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.
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John Original owner '81 911SC blackmetallic coupe. Terbatrol, SSI, M+K Gen 4, SC+ cams, A/C delete, console delete, heater backdate, 7 & 8 x 16 Fuchs with polished rims, Turbo tie rods, tensioner update, Rennline engine mount bar, Mainely Custom sump plate, new top-end, corner balance. |
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08-01-2006, 06:29 AM
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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
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Ben 89 944,85.5 944 914-6 2.4s GT tribute. 914-6werkshop.com |
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08-01-2006, 06:45 AM
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1981 Porsche 911SC
Max
