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Join Date: Mar 2006
Location: Elk Grove, CA
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Will they fit??
I have a chance to pick up a set of GHL headers with heat that were used on an engine in an 88 3.6L ....however I don't know if the ones off a 3.6L will fit on a 3.3L?? If they do, will they take any modification?
I would appreciate someone with better knowledge than mine to give me some insight. Chuck
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1987 factory Slantnosed 930 Cabriolet/Guard's red 2002 Midnight Blue 996TT X50 1999 Iris Blue 996 (Dash fire burned and totalled 9/07) |
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01-16-2007, 04:47 PM
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I think the 3.6 turbo's had slightly larger exhaust ports, so the 3.6 headers you speak of may not be a direct bolt-on affair with a 3.3. You may need to open up your exhaust ports
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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 
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01-16-2007, 04:59 PM
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I'm running 993TT headers on mine. Since a 993 I had to flip the flanges on one side. If I'm correct, this was not the case for 964's. The port size may be bigger, but the exhaust pipes on the 993's were only 1.5" which I don't think are to big. Again, not 100% sure of your exact application, but I'd DEFINITELY keep researching.
If 993's work, I find it hard to believe the 964's wouldn't???? Another option, call GLH tommorrow  The only reason that I know why you can't mount SSI's on a 964 is that it would choke it down. I think that if your cross section goes up in the primaries the velocity will be improved enough by design and length that the turbines will still see more heat and better pulsing. Certainly might be a good shot.
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Luke S. 72 RS spirit 2.7mfi, 73 3.2 Hotrod on steelies, 76 993 3.3efi TT, 86 trackrat, 91 C4s widebody,02 OLA winning 6GT2, 07 997TT, 72 914 v8,03 900 rwhp 996TT |
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01-16-2007, 05:07 PM
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"Another option, call GLH tommorrow "......................Good idea...nothing like going to the source. Thanx. Chuck
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1987 factory Slantnosed 930 Cabriolet/Guard's red 2002 Midnight Blue 996TT X50 1999 Iris Blue 996 (Dash fire burned and totalled 9/07) |
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01-16-2007, 05:11 PM
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Quote:
Agree, call GHL and find out 
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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
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01-16-2007, 05:16 PM
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I called GHL today and talked to Brian....they won't fit...the 3.6 L uses larger ports and using these will actually result in a loss of power for a 3.3 L.
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1987 factory Slantnosed 930 Cabriolet/Guard's red 2002 Midnight Blue 996TT X50 1999 Iris Blue 996 (Dash fire burned and totalled 9/07) |
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01-17-2007, 07:53 PM
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Location: Columbus, OH
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Chuck, sorry I missed your post earlier as I could have saved you some time. I had the same opportunity about 2 months ago, but with B&B headers. Called B&B (useless) and a few smart turbo shops to learn exactly what you stated above. Too bad since I could have had them for $400...
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Maxx 86 Ruf'd and rebuilt (sold) |
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01-17-2007, 08:24 PM
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Hrm... you could try out the OBX 930 321 headers for ~$400 and let us all know how they perform! LOL!
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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
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01-17-2007, 08:27 PM
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From what I've heard, most of the stainless products like the OBX are coming from China...and there are various grades of 304 stainless...and I have doubts as to whether some of these advertised as 321 are really 321. I'm not saying that the Chinese manufactured headers are inferior....it's just that there's no emipirical data available...no quality control info...all too new and not enough folks who have been there done that to give us some feedback. $400 for a set of headers is tempting...but not without some testing or personal experience. I'm skeptical from the standpoint of material, quality of welds, and particular composition of the stainless steel being used.
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1987 factory Slantnosed 930 Cabriolet/Guard's red 2002 Midnight Blue 996TT X50 1999 Iris Blue 996 (Dash fire burned and totalled 9/07) |
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01-17-2007, 09:17 PM
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