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Join Date: Nov 2006
Location: Shanghai/Florida
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930 Convertion Question

First off this is my first post and I am glad to find such a great site with such knowledgeable people. So my question is this, I have been reading many post regarding the conversions of non-turbo 911”s to turbo’s and want to know if the exhaust headers and turbo piping from a 1978 3.3 turbo model will bolt up to a 1981 3.0 engine? I read that the 1976/77 3.0 will but was curious about the 3.3.

Also should mention that my car is CIS but would be considering FI before performing any turbo work.
Old 12-03-2006, 06:50 PM
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3.3 cylinder heads have somewhat different exhaust port design, as headers have pronounced "lip" that goes into the head to help sealing. Other from that, I believe it should fit OK.

In worst case, you will be forced to cut the flanges and weld new ones fitting SC heads.
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Old 12-04-2006, 03:47 AM
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Thanks, I have also checked with the guy selling the 3.3L headers and exhaust and he is also pretty sure that it will bolt up.
Old 12-04-2006, 09:03 PM
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BTW, here are some pictures of the exhaust system I been looking at, DAMN these header look sexy



Old 12-04-2006, 09:12 PM
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Garage
Are you bidding on these?
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1980 911SC Slant Nose

Can you say MegaSquirt !
Old 12-05-2006, 01:29 AM
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No, I think I am going to hold off. They look great and probably will put out some great HP increases but I still want to be able to have heat..

Here is the link if you are intested. There is still 1 day left.

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&sspagename=ADME%3AB%3AAAQ%3AUS%3A1&viewitem=&item=300055163673
Old 12-05-2006, 02:42 AM
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I have those exact same headers on my car and they are simply awesome, especially with the ball-bearing turbo & Magnaflow Muffler. I got mine for $750, including new oil line & shipped to my door in AUSTRALIA
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Merv
'89 911 Turbo Cab
Protomotive MAP ECU, Twin Plugged Heads, GT2-EVO CAMs, 3.3L fully finned P&C's, ARP fasteners, C2T head gaskets, Titanium Retainers, Turbo spec valves, springs & guides, 964 splash valves, GT35R BB turbo, GSF Stainless Headers, Magnaflow Exhaust, Full bay Intercooler, TiAL 46mm w/gate, TiAL 50mm BOV, Apexi AVC-R EBC, SPEC Stage3+ Clutch kit, Crane CDI Ignition
Old 12-05-2006, 12:35 PM
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WydRyd, what type and size turbo you running?
Old 12-05-2006, 08:28 PM
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Garrett GT35R ball-bearing unit... 0.78A/R divided inlet turbine HSG w/V-band discharge. For a 3.0, like yours, I'd highly recommend the GT30R for sure
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Merv
'89 911 Turbo Cab
Protomotive MAP ECU, Twin Plugged Heads, GT2-EVO CAMs, 3.3L fully finned P&C's, ARP fasteners, C2T head gaskets, Titanium Retainers, Turbo spec valves, springs & guides, 964 splash valves, GT35R BB turbo, GSF Stainless Headers, Magnaflow Exhaust, Full bay Intercooler, TiAL 46mm w/gate, TiAL 50mm BOV, Apexi AVC-R EBC, SPEC Stage3+ Clutch kit, Crane CDI Ignition
Old 12-06-2006, 01:24 PM
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