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Model specific boards => Golf mk4 => Topic started by: brianpologti on 23 January 2012, 18:14

Title: Porting a ko3 exhaust manifold
Post by: brianpologti on 23 January 2012, 18:14

Basically I am running  a hybrid turbo and I remember nick telling me that I need to port the standard manifold as the aftermarket ones crack. Anyone done this themselves on a ko3 , I think it's just number 3 port and where they all meet. Or maybe know  a link or someone in Herts area that can do it.

Title: Re: Porting a ko3 exhaust manifold
Post by: Darksider1.8T on 23 January 2012, 18:26

you can do it with a dremel, http://www.google.co.uk/products/catalog?hl=en&gs_upl=1015l4123l0l4729l6l6l0l0l0l0l332l1162l0.3.2.1l6l0&bav=on.2,or.r_gc.r_pw.r_cp.,cf.osb&biw=1600&bih=775&q=dremel&um=1&ie=UTF-8&tbm=shop&cid=6738478458116096513&sa=X&ei=OqYdT8jvNo2XOri2kZwL&ved=0CJcBEPMCMAE

http://www.youtube.com/watch?v=_Yyy872nD_0

Title: Re: Porting a ko3 exhaust manifold
Post by: brianpologti on 23 January 2012, 19:35

Cheers

Title: Re: Porting a ko3 exhaust manifold
Post by: brianpologti on 24 January 2012, 10:55

Had a little look around there some pics on snc, if anyone else is interested.
http://www.seatcupra.net/forums/showthread.php?t=274034&page=3

Title: Re: Porting a ko3 exhaust manifold
Post by: Chris. on 24 January 2012, 16:34

Any particular benefits?

I cant see it making a difference TBH,  Id much rather buy the THS large port exhaust manifold

Title: Re: Porting a ko3 exhaust manifold
Post by: Darksider1.8T on 24 January 2012, 16:40

Quote from: Chris. on 24 January 2012, 16:34

Any particular benefits?

I cant see it making a difference TBH,  Id much rather buy the THS large port exhaust manifold

THS manifolds are rubbish i saw mine crack after 1k miles, standard ported ones are much better and half the price

Title: Re: Porting a ko3 exhaust manifold
Post by: Chris. on 24 January 2012, 16:43

Never knew they cracked.

Finding a uncracked standard one that ran stock power is even hard!

Title: Re: Porting a ko3 exhaust manifold
Post by: golf-sib on 24 January 2012, 16:46

Quote from: Chris. on 24 January 2012, 16:43

Never knew they cracked.

Finding a uncracked standard one that ran stock power is even hard!

I have a spare one but now tempted to do this on the spare one, once I swaps it over I'll put other stock one on sale

Title: Re: Porting a ko3 exhaust manifold
Post by: Chris. on 24 January 2012, 16:53

I looked at doing it with my spare.....but read/heard it made little difference.
Comparing the OEM inlets/outlets to their relevant gaskets showed there is VERY little room for porting unless you do it inside the collector.  But the way I see it, the gases still have to go through the same size end outlet.

Title: Re: Porting a ko3 exhaust manifold
Post by: jonrandom on 24 January 2012, 17:03

Ive got 2 spare if anyone wants one both in good condition just pm me  :wink:

Title: Re: Porting a ko3 exhaust manifold
Post by: dilbert on 24 January 2012, 18:29

wont the head need matching to the exhaust ports ?

Title: Re: Porting a ko3 exhaust manifold
Post by: brianpologti on 24 January 2012, 18:54

Iam  running a ina one which I ve heard some crack , some don't, but I ve picked up a spare manifold so   I thought I get it ported , as ive got to have the head off , slight oil leak and don't want to find it and get stuck. But then I ve heard standard ones crack too , as my daliy did at 130000 so luck of the draw ,