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930gt-40r's Avatar
 
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Next year when I send out my heads for larger valves, I will most defenatly have the exhaust ports reemed out for larger primaries.
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Kris @ Tech9
86' 930/GT-40R Sold
94' Rustang GT daily (long gone)
2008 C6/Z51 Corvette
Old 04-02-2007, 06:21 AM
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Quote:
Originally posted by 930gt-40r
Next year when I send out my heads for larger valves, I will most defenatly have the exhaust ports reemed out for larger primaries.
Cool - but I wouldn't go larger than 1 5/8" though.
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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 04-02-2007, 02:58 PM
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I wouldnt either, I think that is a good size for my intended use.
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Kris @ Tech9
86' 930/GT-40R Sold
94' Rustang GT daily (long gone)
2008 C6/Z51 Corvette
Old 04-02-2007, 03:24 PM
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I think I'd need to get B&B to supply a set which have 1 5/8" flame rings, with a tube ID of 1.5". This will match the Carrera exhaust ports perfectly and won't have any resrictions or mismatches in the junction.
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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 04-03-2007, 10:32 PM
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I think it is a good move for your car seeing as you have the higher flowing heads.
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Kris @ Tech9
86' 930/GT-40R Sold
94' Rustang GT daily (long gone)
2008 C6/Z51 Corvette
Old 04-04-2007, 05:49 PM
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BTW, B&B quoted me ~$1850 for custom headers made to my specs (i.e: 1 5/8" flame rings, with the ID of the primaries @ 1.5"). This is without heater boxes. With heat was appox $2250. All in T321 s/steel.

Good deal?
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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 04-05-2007, 07:58 PM
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Quote:
Originally posted by WydRyd
BTW, B&B quoted me ~$1850 for custom headers made to my specs (i.e: 1 5/8" flame rings, with the ID of the primaries @ 1.5"). This is without heater boxes. With heat was appox $2250. All in T321 s/steel.

Good deal?
seems pretty damn expensive to me
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Old 04-05-2007, 08:10 PM
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Agree!
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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 04-05-2007, 08:13 PM
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Damn, Are they made out of platinum? You could buy the s.s bends, tig welder, flanges, and learn how to weld for that price.
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86' 930/GT-40R Sold
94' Rustang GT daily (long gone)
2008 C6/Z51 Corvette
Old 04-05-2007, 08:46 PM
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You think that's expensive? Guess how much Billet Design or Protomotive charge for a set of headers I know you get what you pay for, but some of the prices I've been quoted is out of this world

Then, when people mention names like GSF or OBX, they shriek because they are cheap and don't really have a long reputation in Porsche circles.

Also, there's something about running headers with heater boxes around them that makes me shy away. I'm not a fan of wrapping already glowing red headers with heater boxes. It just accelerates the rate of deterioration of the welds IMHO. Then people wonder why they can smell exhaust fumes in their cockpit when the heater is turned on Very dangerous solution!

I have Protomotive's engine oil cooler heat exchanger, which works OK in our climates, but the only down-side is that it requires the engine oil to heat up to operating temps before it's really effective. Your kickpanel/footwell blowers also have to be in good functional condition too
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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

Last edited by WydRyd; 04-05-2007 at 09:05 PM..
Old 04-05-2007, 09:00 PM
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Ahhh, so thats who makes that exchanger, I have worked with one of those before, I like the Idea of that.
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Kris @ Tech9
86' 930/GT-40R Sold
94' Rustang GT daily (long gone)
2008 C6/Z51 Corvette
Old 04-06-2007, 05:52 AM
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Merv, I am not sure if you are right about the heat option for headers. With heat, yes they wrap round the headers that are very hot but remember that they have cold air being constantly pushed through them from the engine fan. I may be wrong but I would have thought that would help at idle in traffic considerably. When on the move I wouldn't think there is a great difference between the fan cooling them & the movement cooling them.

Does anyone actually know at all from experience.

Happy Easter !
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1981 UK 930. G50/01 shortened, 964 3.8RS Fibreglass Body Kit, 18" Alloys 8.5" F & 10" R, 225's F & 285's R, Special Colour Metallic Blue Paint, FIA Sparco Evo's, A/C and Air Pump removed, Electronic Boost Controller, GHL Headers, Tial46 WG.
Fitting - New service kit.
Needs Fitting - Innovate XD-16 Kit, Kokeln IC. Stephen's K27 HFS, EVO Intake Assy & his Modded USA Fuel Head.

1983 UK 911 3.2 Carrera Sport Coupe. Black, Black Leather with Red Piping, Black Alloy Gear Knob, K&N Air Filter Element, Turbo Tie rods.
Needs Fitting - K&N CO Sensor, Round A/F Dial Gauge, Factory Short Shift Kit.

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Last edited by NathanUK; 04-07-2007 at 03:55 AM..
Old 04-07-2007, 03:44 AM
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