Grouppe S v2 headers: Question!
#1
Grouppe S v2 headers: Question!
Do these headers need thermal lagging? Their advert (see Chrome's thread here) seems to state they are sprayed. Anyone know about the v2 spec?
911
911
#6
The oil filter cops it too!
I think I have 2 thoughts here, keep it hot for the benefit of the gasses/turbo, and to insulate the 'surroundings' from the heat.
If the headers are polishes then the heat does not escape so readily.
Thanks for the responses as ever.
911
I think I have 2 thoughts here, keep it hot for the benefit of the gasses/turbo, and to insulate the 'surroundings' from the heat.
If the headers are polishes then the heat does not escape so readily.
Thanks for the responses as ever.
911
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#8
My headers and up-pipe are wrapped
Never heard of wrapping them voiding the warranty or cracking.............. (if they are properly coated and then wrapped maybe they would crack........)
Never heard of wrapping them voiding the warranty or cracking.............. (if they are properly coated and then wrapped maybe they would crack........)
#10
Andy/Harvey, is there any tangible difference between HKS/Gruppe S in fit and performance, especially with the Sti v3 up pipe?
Been offered some wrapped HKS (''slightly unequal length'') at a reasonable price.
It will be matched with one of your turbo's Andy and an Apexi over Xmas!
911
Been offered some wrapped HKS (''slightly unequal length'') at a reasonable price.
It will be matched with one of your turbo's Andy and an Apexi over Xmas!
911
#11
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Not a great deal of difference, the HKS collector looks a bit better inside as it has a cone at the junction of the 4 pipes to smooth out the flow. Also no flange problems on any of the early/late HKS that I'm aware of.
Both them fitted well, the later Gruppe-s giving greater clearance to the surrounding wires.
Andy
Both them fitted well, the later Gruppe-s giving greater clearance to the surrounding wires.
Andy
#12
Thanks for that Andy.
I want to keep the burble, and it seems the Gruppe s V2's are better than the V1's.
The GB spec is with the helix flex up pipe.
Makes sense to fit it all when I order and get your turbo.
911
I want to keep the burble, and it seems the Gruppe s V2's are better than the V1's.
The GB spec is with the helix flex up pipe.
Makes sense to fit it all when I order and get your turbo.
911
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911 I have bought the Jet coated headers and also a v2 Helix up pipe which I am told addresses the leak problems as it has a flexible centre section.
Haven't fitted them yet so can't comment but will post again once they are on.
What I have been recommended to do is to rub the flange surfaces down with sandpaper to ensure a perfectly flat surface prior to fitting!
Have been told not to wrap the coated headers and to wrap the flexible up pipe in 3 stages - ie wrap at both ends and centre seperately as the pipe is flexible and if wrapped in one continous wrapping it would be more susceptible to breaking apart.
Haven't fitted them yet so can't comment but will post again once they are on.
What I have been recommended to do is to rub the flange surfaces down with sandpaper to ensure a perfectly flat surface prior to fitting!
Have been told not to wrap the coated headers and to wrap the flexible up pipe in 3 stages - ie wrap at both ends and centre seperately as the pipe is flexible and if wrapped in one continous wrapping it would be more susceptible to breaking apart.
Last edited by highlander; 20 July 2004 at 01:50 AM.
#16
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I have/had the v2 gruppe s headers on mine with the flexi up pipe, and they worked very well.
Mine were the 3rd set i have installed and there has been no problems. The flanges are certainly thick, but not perfect.
The procedure i used was as follows
install the headers.
remove brackets for turbo support
bolt up pipe to headers evenly
bolt up pipe to turbo
by removing the brackets, it allows for movement at the turbo end, and doesnt put as much stress on the bottom flange IMO
Mine were the 3rd set i have installed and there has been no problems. The flanges are certainly thick, but not perfect.
The procedure i used was as follows
install the headers.
remove brackets for turbo support
bolt up pipe to headers evenly
bolt up pipe to turbo
by removing the brackets, it allows for movement at the turbo end, and doesnt put as much stress on the bottom flange IMO
#17
I also thought the Gruppe-s now has a 3 bolt flange on the up pipe intstead of two.
I filed the flanges flat on my V1 Gruppe-s and added a thicker gasket. If it leaks then I'll add 2 extra blots to the flange.
Mark A
I filed the flanges flat on my V1 Gruppe-s and added a thicker gasket. If it leaks then I'll add 2 extra blots to the flange.
Mark A
#20
The turbo support brackets are substantial parts, and the turbo quite heavy. Won't the vibration eventually fatigue the flex u/p?
The water pipes and oil filter run close to the stock header cross tube at the front of the engine, and on the www.flat4.com site (I think) there are a set of HKS headers with local shields bolted to the header tubes in these areas.
I'm sure a simple stainless shield could be arranged to protect these areas with the Gruppe S?
911
The water pipes and oil filter run close to the stock header cross tube at the front of the engine, and on the www.flat4.com site (I think) there are a set of HKS headers with local shields bolted to the header tubes in these areas.
I'm sure a simple stainless shield could be arranged to protect these areas with the Gruppe S?
911
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