Fabspeed vs AWE Headers
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From: Raleigh NC
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The first option is heavy and cheap the second is lighter and expensive.
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From: NJ
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Kline has some nice headers for the 997.2s. Talk to Sam from ByDesign. I think you can get them either in stainless steel or Inconel. I've seen them on the 991s and they are quality. Haven't heard of any issues cracking.
Or, if you want something no-compromise, BBi has one piece cast Inconel headers for the 997.2. I run them on my car. Lifetime warranty
http://bbiautosport.com/new/index.ph...aust-manifolds
Or, if you want something no-compromise, BBi has one piece cast Inconel headers for the 997.2. I run them on my car. Lifetime warranty
http://bbiautosport.com/new/index.ph...aust-manifolds
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From: Raleigh NC
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From my experience (on other cars) i feel like turbo headers work like gradients between turbo sizes.
If you use huge diameter primaries and a high volume collector with no thermal barrier your turbo will spool slower but will make a couple more ponies on the big end. The exhaust gas cools and carries less energy into the turbine (making it act bigger than it is)
If you go to small primaries with ceramic coating inside and out or double wall etc. the turbos will spool faster but since the exhaust gas retains so much energy it will choke out the turbine and possibly even the waste gate (bigger problem on single turbo cars) with less dense air leaving a couple hp on the table and maybe causing boost spikes. (making the turbine act smaller than it is)
Also.... scavenging on a turbo motor isn't possible in boost scavenging requires free flowing exhaust so that the pressure waves draw the exhaust gasses out.... yeah when all those exhaust gas pulses build up behind a turbine there is no scavenging. And even when you design a header for scavenging it only works over a very small RPM range that the wave lengths line up just right. N/A cars usually tune it for right before redline on a turbo car you usually tune it to help spool the turbo faster.
But you know... i have no idea what i'm talking about please continue to vote down my rep.
If you use huge diameter primaries and a high volume collector with no thermal barrier your turbo will spool slower but will make a couple more ponies on the big end. The exhaust gas cools and carries less energy into the turbine (making it act bigger than it is)
If you go to small primaries with ceramic coating inside and out or double wall etc. the turbos will spool faster but since the exhaust gas retains so much energy it will choke out the turbine and possibly even the waste gate (bigger problem on single turbo cars) with less dense air leaving a couple hp on the table and maybe causing boost spikes. (making the turbine act smaller than it is)
Also.... scavenging on a turbo motor isn't possible in boost scavenging requires free flowing exhaust so that the pressure waves draw the exhaust gasses out.... yeah when all those exhaust gas pulses build up behind a turbine there is no scavenging. And even when you design a header for scavenging it only works over a very small RPM range that the wave lengths line up just right. N/A cars usually tune it for right before redline on a turbo car you usually tune it to help spool the turbo faster.
But you know... i have no idea what i'm talking about please continue to vote down my rep.
Last edited by somefoo1; Feb 26, 2016 at 07:00 PM.
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The cool kids here with no clue like to get on their sponsor accounts and hack away at rep points. Its kinda sad so dont pay attention too it. Think school yard morons and as cool as they will be is being cool here.
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Someone also gave me a negative rep! I re-read what I wrote and was like what the
heck is this persons problem. Also on another thread the same thing...who ever it is, it is VERY immature!
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Thanks for positive reps guys. Will defo reciprocate and I've had a cyber attack of neg rep on my rep lol.
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From: Bklyn
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I've never hears one good thing about fabspeed and most cases they've cracked ..I'm not sure about awe never heard anything about them.....but you soud really check out what fabworx is doing with the headers....there's making some quality stuff...I've been in there shop...top notch...
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Concerning headers how does it effect exhaust sound?
Someone that has actual experience with just a header swap with the same exhaust before and after the swap.
On VTG's does it have a higher pitch shriek, lower bass sound growl etc?
I bought my 996T with Billy Boat headers (never a problem after 35 000+ miles with cracking etc) already in the car, so I don't know how it effects sound verses stock manifold.
One of my highest priorities with my 911 is a visceral feel and sound to my machine. If adding headers only add more "exotic" sound AND DOES NOT TAKE AWAY POWER, I am very interested!
Hopefully I would not lose a rep point for this innocent post as well...��
Someone that has actual experience with just a header swap with the same exhaust before and after the swap.
On VTG's does it have a higher pitch shriek, lower bass sound growl etc?
I bought my 996T with Billy Boat headers (never a problem after 35 000+ miles with cracking etc) already in the car, so I don't know how it effects sound verses stock manifold.
One of my highest priorities with my 911 is a visceral feel and sound to my machine. If adding headers only add more "exotic" sound AND DOES NOT TAKE AWAY POWER, I am very interested!
Hopefully I would not lose a rep point for this innocent post as well...��
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Joined: Jun 2014
Posts: 604
From: Bklyn
Rep Power: 57
Concerning headers how does it effect exhaust sound?
Someone that has actual experience with just a header swap with the same exhaust before and after the swap.
On VTG's does it have a higher pitch shriek, lower bass sound growl etc?
I bought my 996T with Billy Boat headers (never a problem after 35 000+ miles with cracking etc) already in the car, so I don't know how it effects sound verses stock manifold.
One of my highest priorities with my 911 is a visceral feel and sound to my machine. If adding headers only add more "exotic" sound AND DOES NOT TAKE AWAY POWER, I am very interested!
Hopefully I would not lose a rep point for this innocent post as well...��
Someone that has actual experience with just a header swap with the same exhaust before and after the swap.
On VTG's does it have a higher pitch shriek, lower bass sound growl etc?
I bought my 996T with Billy Boat headers (never a problem after 35 000+ miles with cracking etc) already in the car, so I don't know how it effects sound verses stock manifold.
One of my highest priorities with my 911 is a visceral feel and sound to my machine. If adding headers only add more "exotic" sound AND DOES NOT TAKE AWAY POWER, I am very interested!
Hopefully I would not lose a rep point for this innocent post as well...��
To be honest the header is going to give you the sound the designer sets them for....I'm leaving you a message
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Our headers for those interested are 304 schedule 10 stainless steel, billet flanges cut+ all tig welded and hand made here at our facility in New Jersey, when comparing our quality to other brands that are "less" priced but backed by major brands and well marketed, there is no comparison from a fabrication stand point and ours won't crack or break and are tested on cars making 1300-1600whp on a mustang dyno with no signs of any leaks cracks or deforming over seasons of use AKA bulletproofed 
We offer ours for $2400 shipped to 6 speed members and normal retail is $2950, they are custom tailored with flanges for stock turbos,Precision,Xona,Garretts.
We will be finishing up a set for brooklynboosting shortly for those locally interested you can swing by our shop anytime to see a set in person!
We offer ours for $2400 shipped to 6 speed members and normal retail is $2950, they are custom tailored with flanges for stock turbos,Precision,Xona,Garretts.
We will be finishing up a set for brooklynboosting shortly for those locally interested you can swing by our shop anytime to see a set in person!
