Black Polo GTI 6 Speed. 390 BHP Build

[9N3 Turbo]

Little update
Off tomorrow to Badger5 to have the map tweaked and up the boost
Can't wait.
Video and new power figures to follow

[Dels_concept_gti]

omg I have just scanned through this thread started at 5 till now haha amazing amount off effort gone into this I would love to pick your brains over a beer as purchased my 9n3 gti about 6 month ago
done the usual

-miltek non res
-de cat
-forge tip
-forge split r dv
-stage 1 map from awesome gti

looking to get the following soon
-FMIC
-PD160 intake
-cone in a box like yours
-maybe k04

I was woundering if you could help with an issue I have water "leak" its using quiet abit tbf and the light flashs at me : | so I get out look at the expansion bottle to see its nearly empty : \ as soon asi remove the cap hot slowly obvs lol the bottle fills back to max also dose this when its cold I have had 4 people look at it and nobody can tell me whats going on annoying had a coolant pressure test done 10bar and it didn't move so he tells me if it had a leak it would show on the gauge buy loosing pressure iv changed the expansion bottle and cap as was told mine was fooked but still the problems there I really hope somebody can help me out before a trip to VW £££££££ in live in Bradford west Yorkshire if somebody would be kind enough to sort this
cheers
olly

Hi Olly and thanks for taking the time to read my extensive build.
Happy to chat over a beer but I expect Bradford to Essex is a long drive lol

Can you actually see any water on the ground?
Does your heater blow hot air?
Does your fan cut in?
Does the temp gauge go over half way?
If not a common place for water to leak from is the bottom right hand side of the rad.
If this all looks to be in order it could be that you have an air lock in the system.
As water system is pressured when you remove the cap the water level will rise.
To get rid of the air lock I run the car from cold with the cap off till the water reaches half way then close the cap and wait for the fan to cut in. If the fan doesn't come in and temp goes over half way I turn it off leave for 30 mins then take cap off put more water in and run again with cap off till half way or water starts to rise up in the bottle before closing the cap and this usually sorts it.

thank you for the responce and yeah tbf essex is a drive lol to answer your questions
Can you actually see any water on the ground? NO
Does your heater blow hot air? YES
Does your fan cut in? Notsure i have heard it before but prior to problem
Does the temp gauge go over half way ? no if anything it stays at 88-89 were as when i got it it was 90 witch is optimum temp were it should be ?
it hasnt over heated at all may be due to the cold weather now iv also be told to check heater matrix hoses at the back of the block ?
also starts lumpy when hot like on 3 cylinders after a few seconds clears and its fine really strange could that be due to the above problem or somthing eles they joys lol
cheers again mate appreciate it

[9N3 Turbo]

thank you for the responce and yeah tbf essex is a drive lol to answer your questions
Can you actually see any water on the ground? NO
Does your heater blow hot air? YES
Does your fan cut in? Notsure i have heard it before but prior to problem
Does the temp gauge go over half way ? no if anything it stays at 88-89 were as when i got it it was 90 witch is optimum temp were it should be ?
it hasnt over heated at all may be due to the cold weather now iv also be told to check heater matrix hoses at the back of the block ?
also starts lumpy when hot like on 3 cylinders after a few seconds clears and its fine really strange could that be due to the above problem or somthing eles they joys lol
cheers again mate appreciate it

To test fan run up to temp and leave standing with bonnet till fan cuts in keep an eye on gauge too in case it goes over half way.

There are 2 hose going into the bulk head these are the heater hoses. Check both are hot in-out.

As for lumpy star from cold this will be plugs. If you Change/clean them this will stop. It's more noticeable on mapped GTIs so don't use stock spark plugs use RS2 or, NGK

[Dels_concept_gti]

the fan dose work but its too cold this time of year for it to cut in it just stays at 90 dosnt go over so fan wont kick in will it ?
sorry for sounding abit dumb lol im checking the hoses tnyt n also the lumpy starts mainly when its hot it starts rough i had it serived not so long since and it did it before i got it servicedso was hoping the spark plugs wa foooked but it appeared not : / unless hes used the wrong plugs will double check tnyt what plugs you runing ?

[9N3 Turbo]

So went to Badger5 yesterday to tweak the map to take in to account the new flowed head and up the boost.
I wanted to do a run to find out the improvement with the flowed head so after a run on the dyno it came out at 329.6bhp which was an improvement of 9.4 BHP. However after looking into it we found it was only producing 20psi of boost although it was previously mapped to 22psi and taking an extra 1000 rpm to run up to full boost even though it was the same map from my previous session.

After a bit of logging checking around we noticed the waste gate was cracked open as there wasn't enough tension on the actuator arm. So I rectified this and Bill started the mapping.

I walked out a very happy man with 389.3 BHP @ 6922rpm (335.5bhp at the wheels), 315 lbft @ 6106rpm and this was set at just under 26psi of boost.

Here are a couple of videos
The first run
http://i826.photobucket.com/albums/zz18 ... 05f33a.mp4

I didn't get the final run but this was one just before at 388bhp
http://i826.photobucket.com/albums/zz18 ... faf323.mp4

And a couple pics of the graphs.





All I can say is this car is an absolute animal and scary fast to drive and I love it

[sam_vw]

Congrats Junior! Hard work and money pays off

[9N3 Turbo]

Congrats Junior! Hard work and money pays off

Cheers man. So happy with it right now. Power is immense

[Josh_PoloGTi]

Wowsers! Nice figures, I bet it's an animal !!

[TomG]

Amazing! Such a complete build.

[9N3 Turbo]

Wowsers! Nice figures, I bet it's an animal !!

Cheers mate. And yes it's a beast

[9N3 Turbo]

Amazing! Such a complete build.

Thanks

[greypolo9n3]

Im sure we want some videos?!

[Dels_concept_gti]

hi epic power would love a ride init : ) just a quick one buddy what turbo upgrade would you advise on standard internals waiting for my decat and FIMC to land then turbo shopping next want it all fitting and mapping at the same time any advise muchas grasias

[Lukeygower]

What turbo set up are you running on you car if you dont mind me asking ??

Sent from my GT-I9300 using Tapatalk

[9N3 Turbo]

What turbo set up are you running on you car if you dont mind me asking ??

Sent from my GT-I9300 using Tapatalk

I'm running a Turbo Dynamics MDX 555 400 turbo

http://www.turbodynamics.co.uk/shop/mdx ... -4204.html