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Join Date: Apr 2008
Location: Clarksburg MD
Posts: 614
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SSIs thin or thick
I have an 3.0 82 SC And I am going to buy a set of SSIs that are thin flange. I don't know if they will fit? will someone please tell me if they will before I buy them. And what the difference is. Thanks a lot Jake
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08-25-2008, 12:22 PM
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US cars changed from thin to thick flanges in '80
RoW in '84
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Bill Verburg '76 Carrera 3.6RS(nee C3/hotrod), '95 993RS/CS(clone) | Pelican Home |Rennlist Wheels |Rennlist Brakes | |
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08-25-2008, 12:40 PM
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Can I use thin flange on my 82SC 3.0?
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08-25-2008, 12:44 PM
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Friend of Warren
Join Date: Oct 2000
Location: Lincoln, NE
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But you can still use them if you are willing to either replace the exhaust studs with shorter studs or stack some washers to take up the extra length of the studs on your car.
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Kurt V No more Porsches, but a revolving number of motorcycles. |
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08-25-2008, 12:44 PM
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Join Date: May 2007
Location: Sarasota, Florida
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The thick-flange SSIs come with the oxygen sensor bung built-in. The thin-flange ones don't have this. If you want to continue using the lambda system on your 83, you'll want to have that bung.
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Fritz 1983 911SC |
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08-25-2008, 01:00 PM
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What is the lambda system? and do I need it? I dont have to get my car inspected.
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08-25-2008, 01:13 PM
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*****
Join Date: Apr 2006
Location: Charleston, SC
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Quote:
Regarding the thick v. thin ... depends on the exhaust studs as mentioned above. I installed all new studs that would work with the thin flange b/c the PO had a mix and match of various sized exhaust studs. When I pulled the exhuast of nearly all of the studs pulled out too. So I took the opportunity to replace them.
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82 911SC Coupe Chiffon / Chocolate 9.5 JEs, 964 Cams, SSIs, Dansk Exhaust, CIS (SOLD) |
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08-25-2008, 01:15 PM
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yes, you can also change the exhaust studs out, then use either thick or thin.
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Bill Verburg '76 Carrera 3.6RS(nee C3/hotrod), '95 993RS/CS(clone) | Pelican Home |Rennlist Wheels |Rennlist Brakes | |
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08-25-2008, 01:17 PM
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Location: Charleston, SC
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Quote:
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82 911SC Coupe Chiffon / Chocolate 9.5 JEs, 964 Cams, SSIs, Dansk Exhaust, CIS (SOLD) |
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08-25-2008, 01:20 PM
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w/o the O sensor hooked up the engine reverts to an open loop mode. aka 'limp home'
the car will run well but get worse mileage and of course pollute more.
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Bill Verburg '76 Carrera 3.6RS(nee C3/hotrod), '95 993RS/CS(clone) | Pelican Home |Rennlist Wheels |Rennlist Brakes | |
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08-25-2008, 01:59 PM
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Location: Valencia Pa.
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Yep , thin flange will definately work, and you can just use some extra washers, or spacers to avoid changing the studs, ( sometimes they are pretty scary looking) . This makes the install a little more of a pia, but not that bad.
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No left turn un stoned |
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08-25-2008, 02:02 PM
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Join Date: May 2001
Location: Peoples Republic of Long Beach, NY
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my factory thermal reactor exhaust was thick flange.
then when I called SSI they told me to measure the thickness of the thermal reactor flange because it may also be a thin flanged thermal reactor. anyway.. I bought thick SSI with the O2 hole, an extra probe mount in case I want to run the LM-1 on both collectors for $12, and one cap.
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Ronin LB '77 911s 2.7 PMO E 8.5 SSI Monty MSD JPI w x6 |
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08-25-2008, 02:20 PM
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I had a pair of thin flange early 74 steel exhaust and they were OK but they didn't have the raised port flange that the SSI thick flange had as shown in the pics. IMHO the raised port is enough reason to go with thick flange to reduce the chances of gasket failure and eaiser to install. Does SSI make a thin flange with the raised flanges? My car is an 82 YMMV
 
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Tim 82 SC 90 C2 Yasowatt |
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08-25-2008, 04:06 PM
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Location: Tulsa, Oklahoma
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I have a set of thin flange with O2 bung. They have no raised port. They are waiting to go on my '83 SC once my M&K sport muffler arrives.
Tim, looks like you have the same SSI/sport muffler set up. Do you have it on the car yet and if so how does it sound? Cheers, John |
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08-25-2008, 04:28 PM
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Ronin LB '77 911s 2.7 PMO E 8.5 SSI Monty MSD JPI w x6 |
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08-25-2008, 05:14 PM
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Quote:
 http://www.youtube.com/watch?v=grVxwtEgZ80http://www.youtube.com/watch?v=DGU2PE2C2JU
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Tim 82 SC 90 C2 Yasowatt |
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08-25-2008, 05:16 PM
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1976 Porsche Carrera 3.0
1995 Porsche 993 Carrera Coupe
