Classifieds - We'd like to remind everyone that we do not handle any transactions on the forums. If there is a car or part that you've seen or selling, you press the contact advertiser and then talk via PM's. If you're offered money please do so via CASH or PAYPAL and meet in person. You'll receive an email notifying you that you have a PM, you must return to the forums and answer the PM (Private Message) NOT THROUGH YOUR EMAILS!

Russell Rustyp Pember

GT throttle body, porting, polish and dewedging

5 posts in this topic

Hello there,


My brother has a mk2 Polo GT and I have started working on the spare throttle body. There are a lot of improvements to be made, firstly the infamous "dewedging" which opens up the throttle body but the throttle butterfly spindles can be slimmed down quite a bit to further open up flow. The mouth of the throttle body is quite angular in places and could be smoothed out and made into more of a trumpet shape for better, smoother airflow.


Would there be interest from anyone else with GTs to have the same work done on their throttle bodies on an exchange basis? Just testing the water.


Thanks, Russ

1 person likes this

Share this post

Link to post
Share on other sites

Are you able to get pictures of the work you are doing? 

I could be wrong but it seems to me most of the restriction in the GT intake system is from the AFM and the way the elbow bolts onto the throttle body. 

Share this post

Link to post
Share on other sites

Will try and get pics up soon, I have only started working on the TB yesterday in between other work. I will look at my Brother's GT next time I am over to look at elbow and AFM. Thanks, Russ

Share this post

Link to post
Share on other sites
On 4/21/2017 at 17:01, kwijibo_coupe said:

Are you able to get pictures of the work you are doing? 

I could be wrong but it seems to me most of the restriction in the GT intake system is from the AFM and the way the elbow bolts onto the throttle body. 


Hi Kwijibo,


I had a good look at my Brother's GT yesterday whilst I was re-hanging the front bumper.  


The elbow doesn't look to be too much of a restriction, there is a nice radius in the turn, and has a reasonable cross sectional area.  There are a couple ways it could be modified OR there is potentially a pre-formed silicone hose I have seen that could be used that would be held on with a jubilee clip removing the need for the 2 bolts to be used and allowing the throttle body to be modified further.  I will find a link for the hose.


The AFM itself doesn't look like too much of a restriction when it is open BUT the opening to it inside the airbox is a bit shocking for a so-called sporting model.  All square edges and part of the lid overlaps the AFM opening.  This could be opened up, smoothed out and given a nice radius with a trumpet fabricated.


The air box is pretty useless as the air-filter fills up the large proportion of the lower airbox restricting flow into the airbox and around the airfilter.  The pipework leading to the airbox is a bit limiting as well.  To keep it looking OEM I would suggest using or fabricating a foam panel filter and opening up the bottom of the air-box to flow more air.


The good thing about the AFM is that it will compensate for any extra airflow the mods will provide.


My brother also mentioned Mk3 Golf 1.3 parts can be used as an upgrade?  I took some pics of the stock parts to illustrate, will upload them soon.



Share this post

Link to post
Share on other sites

Photo is of the nearly finished GT throttle body. It has a nice smooth radiused entry into the throttle body for smoother, less turbulent air flow (standard has very square edge) throttle spindles have been slimmed down for less restriction to flow and the wedge removed.

gt tb.jpg

Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Recently Browsing   0 members

    No registered users viewing this page.

  • Similar Content

    • benl478
      By benl478
      PRICE DROP £750 Open to offers as I really need the space. 
      Totally original 1991 Polo GT with factory sunroof and split rear seats. Even has the original Blaupunkt stereo! 2 keys, new carpets and gearstick gaiter and I have bought the original sales brochure and the instruction manual from Ebay.
      I bought this Polo last year as I learnt to drive in Mk2 Polos and always wanted a GT! I've loved every minute with the car which never fails to put a smile on your face but lack of space and growing family means it sadly has to go to make room for a seven seater of some sort. Comes with complete spare set of black GT seats and black parcel shelf in case you want to change the colour or refurbish the current seats. I bought it without any history other than the fact it was owned for the last 20 years by father and then son. As a precaution against the lack of service history and what appeared to be oil contamination in header tank, I immediately replaced the head gasket, had the head skimmed, replaced the water pump and timing belt and changed the oil and coolant. MOT'd on 29 September 2016 with low tyre tread as the only advisory which I immediately replaced. I have since done almost 1500 faultless miles in the car.
      The bad bits are damage to the offside rear wing (see photo) that I have been quoted £180 to repair but have never got round to doing. and the coolant light which flashes until the car is warm.
      The bodywork is average for the year. The door bottoms and sills have had spots of surface rust treated (well) and were covered in stone chip which I removed as I wanted to see what it was covering! There is a also a spot of light surface on the tailgate (see photo) but the chassis is great condition (never been welded) and it drives brilliantly. In short, a lovely, totally unmolested and original Polo GT.
      I thought I would test interest on here before risking the perils of Ebay! Any questions or inspections welcome.
    • fathands
      By fathands
      Hi, should be a simple question for someone in the know:
      what order does the fuel flow around a 3f get system?
      is it:
      lift pump
      the white box
      in line pump
      fuel filter
      injection rail
      return to white box
    • dabigginger
      By dabigginger
      I have for sale two very rare Mk2 GT badges. Not to be confused with the Mk2F one. These are extremely hard to get hold of, but I have two. One is pretty much perfect. With the exception of a little bit of the sticky backing left on it, you'd be hard pushed to see it had been used before. The other is in good condition, but the colour has faded slightly, there are two tiny paler dots in the colour and it looks like something has rubbed it ever so slighltly. However, you've got to look very closely to see these imperfections. I'm not sure what they're worth, but will start at asking for £75 for the former and £60 for the later. Feel free to make an offer though. I'll probably hang on for a few weeks to see what I can get for them though. I'd rather not use eBay due to problems with timewasters.
    • JoeUK
      By JoeUK
      GT Manifold for sale. As far as I'm aware the part number is for a gt one - 030 129 713 B
      Price includes postage.
    • tomjam
      By tomjam
      Does anyone know if any cam covers from other models will fit a gt?
      And if so,will they need a different gasket aswell?