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Model specific boards => Golf mk4 => Topic started by: pickles on 22 January 2013, 17:37

Title: air intake manifold Porting
Post by: pickles on 22 January 2013, 17:37

is it worth doing this while its off?

Title: Re: air intake manifold Porting
Post by: Prawny on 22 January 2013, 18:29

what exactly are you going to port mate?

You can't port the opening from the TB any wider, it's already the right size for the TB, any larger will result in a sudden step. You can't get inside it to port the mouths of the runners, and if you port the bottom it'll be bigger than the head and cause an obstruction.

Can't see any gains to be had that easily, I'd not bother if I were you :)

Title: Re: air intake manifold Port Polishing
Post by: pickles on 22 January 2013, 19:13

edited to a more suitable title. seen a few vids on youtube ,just wana get my new dremel out n use it on something useful lol

Title: Re: air intake manifold Porting
Post by: rockmonkey69 on 22 January 2013, 19:24

As prawny said there's not much you can do and as he suggests; more often than not, the end result is a design with worse flow than originally.
If you want to port match the intake manifold to the head it would require some machining to the inlet on the head itself which requires the head to be removed while working on because of the all the swarf. In terms of real world gains it is very difficult to notice.

Title: Re: air intake manifold Porting
Post by: rio_gti on 22 January 2013, 19:25

use it on the throttle body, little bits get in the little corners!!

Title: Re: air intake manifold Porting
Post by: pickles on 22 January 2013, 19:34

cheers guys, just the exhaust manifold thats worth doing then, itl be coming off shortly as well.

Title: Re: air intake manifold Porting
Post by: MPJ88 on 24 January 2013, 11:19

with FI theres not a lot of gain in porting intake, more sense to spend on exhaust mani.