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Author Topic: porting exhaust manifold ko3s?  (Read 2329 times)

Offline davemk4

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porting exhaust manifold ko3s?
« on: 29 November 2013, 14:52 »
In prep for stage 2 power which im trying to get most bhp as possible. I will be replacing the actuator with a forge one. Whilemanifold off thinking of porting the manifold (in fact ill prob pick up a used one to port ready then swap them over. ) is this a good job to do DIY? Any one done it with good results?
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2001 mk4 GTI 1.8t AUM. k&n induction kit with customer heat shield, 3'' TIP, Forge 007P, Stage 1 map, N249 bypass, 3'' downpipe and decat, 2.75'' Jetex cat back non res, Koni shockers and H&R springs 35mm, dimpled and grooved disks front and back

Offline davemk4

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Re: porting exhaust manifold ko3s?
« Reply #1 on: 11 December 2013, 20:45 »
 :whistle:
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2001 mk4 GTI 1.8t AUM. k&n induction kit with customer heat shield, 3'' TIP, Forge 007P, Stage 1 map, N249 bypass, 3'' downpipe and decat, 2.75'' Jetex cat back non res, Koni shockers and H&R springs 35mm, dimpled and grooved disks front and back

Offline rockmonkey69

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Re: porting exhaust manifold ko3s?
« Reply #2 on: 11 December 2013, 22:09 »


Not fitted mine yet, I'm going to change the turbo and manifold at the same time, got the car booked in for the remap so I'll do it shortly before the remap

Most of the material was removed from the collector
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Offline markgti1.8t

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Re: porting exhaust manifold ko3s?
« Reply #3 on: 11 December 2013, 22:43 »
what did you use to do this
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Offline davemk4

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Re: porting exhaust manifold ko3s?
« Reply #4 on: 12 December 2013, 07:46 »
Ye what did u do?
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2001 mk4 GTI 1.8t AUM. k&n induction kit with customer heat shield, 3'' TIP, Forge 007P, Stage 1 map, N249 bypass, 3'' downpipe and decat, 2.75'' Jetex cat back non res, Koni shockers and H&R springs 35mm, dimpled and grooved disks front and back

Offline mar_k

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Re: porting exhaust manifold ko3s?
« Reply #5 on: 12 December 2013, 07:49 »
Carbide bit it what I was advise to use.
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Offline rockmonkey69

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Re: porting exhaust manifold ko3s?
« Reply #6 on: 12 December 2013, 08:36 »
Carbide bit made light work of the porting of the collector
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Offline davemk4

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Re: porting exhaust manifold ko3s?
« Reply #7 on: 12 December 2013, 11:24 »
So how kuch do you take off or is it just smooth and tidy it up best you can?
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2001 mk4 GTI 1.8t AUM. k&n induction kit with customer heat shield, 3'' TIP, Forge 007P, Stage 1 map, N249 bypass, 3'' downpipe and decat, 2.75'' Jetex cat back non res, Koni shockers and H&R springs 35mm, dimpled and grooved disks front and back

Offline beppe2672

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Re: porting exhaust manifold ko3s?
« Reply #8 on: 12 December 2013, 11:33 »
I need to get round to doing this!
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1999 1.8t AGU, KNN Panel filter, Smoothed air box, Custom CAI, Forge 007 dv, REVO stage 1, 3" eBay TBE. Audi TT quickrack.

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Offline rockmonkey69

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Re: porting exhaust manifold ko3s?
« Reply #9 on: 12 December 2013, 14:18 »
Ideally you should open up the main restrictions but not remove any grooves/channels inside that help to channel airflow. Same applies with the collector, there's a lot that can be removed there, if in doubt check the thickness of different areas before going at it.
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