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Model specific boards => Golf mk4 => Topic started by: davemk4 on 29 November 2013, 14:52

Title: porting exhaust manifold ko3s?
Post by: davemk4 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?

Title: Re: porting exhaust manifold ko3s?
Post by: davemk4 on 11 December 2013, 20:45

 :whistle:

Title: Re: porting exhaust manifold ko3s?
Post by: rockmonkey69 on 11 December 2013, 22:09

(http://i1087.photobucket.com/albums/j471/6rockmonkey9/null_zps842b2357.jpg)

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

Title: Re: porting exhaust manifold ko3s?
Post by: markgti1.8t on 11 December 2013, 22:43

what did you use to do this

Title: Re: porting exhaust manifold ko3s?
Post by: davemk4 on 12 December 2013, 07:46

Ye what did u do?

Title: Re: porting exhaust manifold ko3s?
Post by: mar_k on 12 December 2013, 07:49

Carbide bit it what I was advise to use.

Title: Re: porting exhaust manifold ko3s?
Post by: rockmonkey69 on 12 December 2013, 08:36

Carbide bit made light work of the porting of the collector

Title: Re: porting exhaust manifold ko3s?
Post by: davemk4 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?

Title: Re: porting exhaust manifold ko3s?
Post by: beppe2672 on 12 December 2013, 11:33

I need to get round to doing this!

Title: Re: porting exhaust manifold ko3s?
Post by: rockmonkey69 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.