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newbie
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Standard headers
Gents,
My standard headers are getting a bit ropey on my 1988 turbo. Silly me wants to keep them standard but Turbo headers are hard to find. Will 3.2 headers bolt onto a 3.3 engine? So many different P/N's out there but there are a lot of 3.2 headers for sale in the UK. Could someone advise the difference between 3.2 and 3.3 Turbo headers. Thanks in advance TIM |
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12-02-2016, 01:06 PM
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Join Date: Jan 2015
Posts: 1,499
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Sure the 3.2 NA headers will bolt on but you have to add the plumbing for the turbo and the waste gate. It's probably been done.
On 2nd thought, the 3.2 and 3.3 port sizes are different. Are you talking OEM or aftermarket headers? Last edited by boosted79; 12-02-2016 at 08:02 PM.. |
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12-02-2016, 07:41 PM
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newbie
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I am looking at OEM headers. So hopefully the J pipe will match up to the headers as normal.
Understand port sizes are larger on the 3.2 so question is will the header fit onto the head studs and seal. Thanks TIM |
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12-02-2016, 11:44 PM
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Join Date: Jan 2015
Posts: 1,499
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Stud spacing is the same. If the 3.2 headers have the lip that fit into the port grind it off.
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12-03-2016, 05:08 AM
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Join Date: Apr 2007
Location: Seattle
Posts: 3,032
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They will bolt up but the exhaust ports are bigger on 3.2 heads.
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81 Pacific Blue 930 Euro coupe slicktop on a strict diet, Rarlyl8 headers, Blowzilla turbo, Tial waste gate, Full bay I/C, Home made center out exhaust, Leask WUR, MSD 6AL, PLX wideband Wevo shifter, LSD. Next up, Cams, Heads and port work |
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12-03-2016, 09:00 AM
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newbie
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Thank you for the responses guys. Out of interest then, the header tubes must be larger which should in turn should be of benefit over the OEM turbo headers.
Cheers Tim |
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12-03-2016, 09:16 AM
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may want to check to see if 993 headers will fit if you flip one side of the flanges, like you would on a 3.2. Then just add the plumbing for the turbo and wastegate. I think the 993 headers are supposed to be better. They worked great on my old 3.2...
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Emery 1988 930 coupe - Silver Metallic TurboKraft 3.3L 8:1 CR, SuperSC Cams, GT35R, B&B Headers, TK intercooler, Tial WG, ARP, tecGT based phased sequential EFI & ignition, Wevo shifter/coupler, ... 
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12-04-2016, 03:59 AM
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Registered
Join Date: Sep 2015
Location: Costa Rica and Pennsylvania U.S.
Posts: 3,301
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3.2 exhaust
Hi,I used a lot of these on 930 cars.They are about 6mm larger I.D.and pick the boost up sooner & they look stock.J-Pipe bolts right up.Cheap performance upgrade for a change.Fred
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12-04-2016, 10:33 AM
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Join Date: Feb 2008
Location: Bayside Wi
Posts: 3,027
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Hmm. I have a set NOS headers, J pipe and crossover also a used set ( same) sitting for decades. Also 2 lo miles 86-89 mufflers with good cats in case emissions are important. One muffler/cat with only 1K miles. My 86-89 930s are way beyond ever using them and emissions are not an issue with me.
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Anthony @ Voitureltd Bayside WI. |
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12-04-2016, 05:37 PM
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newbie
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Quote:
Cheers Tim |
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12-05-2016, 04:00 AM
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Registered
Join Date: Sep 2015
Location: Costa Rica and Pennsylvania U.S.
Posts: 3,301
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3.2
Yes,the 3.2.I would machine the exhaust port so the header would fit inside while the heads were off as this makes a bulletproof exhaust manifold gasket and reduces heat soak back to the aluminum head which aids in lower temperature.Win win & it looks stock.Never did a dyno with just the change to 3.2 header as other changes were being done at the same time while it was apart.Fred
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12-06-2016, 04:21 AM
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Thanks Fred, I will not be removing the heads so will have to grind the tubes flush with the flanges.
Great help cheers Tim |
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12-06-2016, 10:21 AM
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