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Twins are more fun!
 
JMA-RUF's Avatar
 
Join Date: Dec 2005
Posts: 639
Question 1 5/8" Headers?

As some of you know, I'm turbo'ing my 3.2 Carrera.

I was going to use OBX or GSF headers, but I'm now thinking I may spend a bit more and get some B&B 1 5/8" headers, to suit the Carrera heads better, since the OBX/GSF stuff has 1 1/2" primaries.

Would those slightly larger primaries be of any benefit in turbo application? Better flow/spool, or would it be negligible?

How much do the 1 5/8" B&B's typically go for?
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James
Carrera TT

(3.3, Protomotive MAP ECU, EFI, GT2 EVO CAMs, Twin Plugged, Twin Turbo's)
Old 02-23-2007, 12:03 PM
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OBX turbo headers are 1.61" primaries.... very close to 1 5/8".
Old 02-23-2007, 04:23 PM
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Twins are more fun!
 
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hmmm, you're right... I like the option of heat though. I wonder if OBX sell them with heater boxes too? Anyone know?
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James
Carrera TT

(3.3, Protomotive MAP ECU, EFI, GT2 EVO CAMs, Twin Plugged, Twin Turbo's)
Old 02-23-2007, 04:43 PM
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Obx probley does not, but Goingsuperfast.com has a set of headers with heat boxes for between 1000 or 1200$ (cant remember). Also, I have seen people make a small shroud that collects air coming off the engine oil cooler and funnels it into the chassis pick-ups for heat. This would be a viable option as it would leave you free to choose what ever headers you want. I heard the heat dosent get as hot, but it does work. I am personally going to create a pipe that is about an inche larger in diameter to slide over the after turbo section of my exhaust and blow air over that into a pipe to get the heat for my car. I plan on buying Eddie B.'s twin manifolds from him eventually that dont have heat.
P.S I used an OBX manifold on my Galant VR-4 and one day an seemingly normal exhaust leak transformd into my turbo and down-pipe laying on the ground at a stop-light breaking the turbo brakets and everything.
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Kris
86' 930/GT-40R Sold
94' Rustang GT daily
Old 02-23-2007, 09:26 PM
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Hello 930gt,

can you post more info on that heat-option please?


Falk
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Old 02-24-2007, 03:19 AM
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The heat boxed goingsuperfast headers are on this page:
http://goingsuperfast.com/Porsche-911-Turbo.html
They look to be quality pieces for about $1,200.
Take a look and tell me what you think. I bought an intercooler from this guy when they first started and it was of great quality, I ended up swapping it for something much bigger though.
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86' 930/GT-40R Sold
94' Rustang GT daily
Old 02-24-2007, 08:49 PM
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