17 replies to this topic

[ollie2007]

Turbo has been removed and is booked in for a complete service tomorrow, while it is there are there any upgrades I should think about??? the car already had the VXR turbo unit as my car is a stage 4 already there must be some mods I can get done to the turbo to make it better??

[scw02102]

Out of interest, how hard was it to get out?

[Nev]

First thing is to check the amount of lateral play in the spindle shaft assembly (CHRA), measure that and let us know. Frankly, considering the delicate and precise nature of turbos I'd just buy a new one, those K04s are cheap as chips these days. Alternately buy the one with the bigger compressor wheel, I think it's called a K06, though someone else can confirm that I'm sure. However you'd deffo need a remap to make it unleash all the power and even then CS won't let it go over about 310 BHP without you installing new rods at least.

Edited by Nev, 08 June 2015 - 06:34 PM.

[Rosssco]

Question about turbos - can you take the compressor side of a K06 and swap it onto most K04's for example, or is the CHRA different, and would need to be replaced too?

[Rosssco]

Seen this. Is it cheap sh*t or not? http://www.turborebu...compressor.html

[ollie2007]

Nev, there is no play at all, the turbo came out fairly easily, it took me under 2hrs

[Rudy]

So, now the turbo is out your basically left with an NA

[ollie2007]

Its probably still faster than yours without the turbo lol

[T VXT]

I've been toying with the idea of a hybrid turbo. I don't think that chra would fit without machining the compressor housing. I don't know enough to choose, but I gather a k04/k06 hybrid is one step up (comp wheel from a k06 turbo) but not really worth doing. The next step is a k04/k16 hybrid, again a even bigger compressor wheel maybe with cut back turbine blades to increase exhaust flow at the top end. http://www.vx220.org...s-to-360380bhp/ Cost for the k16 hybrid from regelin is silly though, but I'm sure someone else could make them. It hard to know what you are buying as there are so many variations of compressor wheels. Need some with the knowledge to point me in the right direction.

[Duncan VXR]

I ran the aet k06/04 a million years ago which has a load of work on the inlet cast pipe opening up etc and some port matching on exhaust / opening wastegate port etc. Billet k06 inlet compressor along with uprated 360 bearing etc etc. Sure in the end it gained about 10bhp without to much of a trade of lower down. Would have to look at some graphs or my old old posts Iirc it was about £800 so chunk more than a new vxr

[Nev]

I am out of touch with these titchy turbos now, best ring up Mark at CS and get an informed opinion.

[siztenboots]

just get it serviced ,I was very happy with the service and advice I got from Turbo Dynamics , there are plenty of options to go hybrid , but when you can get 380 ft.lb of torque from a k04-0049 why bother. I would not try to go over 400 with the standard rods.

 

[ollie2007]

Just a service and a bit of a tweek from the turbo specialist it is then, I am taking it there this afternoon so will keep you all informed on what they recommend.

[siztenboots]

 

 

took a while to put this all together but..

 

Compressor Wheels
==================

Application k03/k04/k06/k16
OE part number xxxx-xxx-xxxx
Inducer (mm)
Exducer (mm)
Shaft bore (mm)
Blade ( # of long/ # of short)
Tip height (mm) stated where known
Thrust Bearing , ( Superback or Flatback )
Name "Exducer(inches)/% inducer profile"


K03
5303-120-2011     31.55     45     4.61     4/4     superback
  ""         31.55     45     4.00     4/4     superback
5303-123-2021     34.5     46     4.61     4/4     superback
5303-123-2007     33.8     45     4.61     4/4     superback
  ""          34     47.8     4.61     6/6     superback
5304-123-2007      35.9     50     4.61     6/6     superback    "2072"
5304-123-2018
5303-123-2018

5303-123-2018     33.63     46.05     4.61     6/6     superback

K04
5304-123-2005     34.55     50     4.61     6/6     superback
5304-123-2029     38.1     51     4.61     6/6     superback     "2075"
5304-123-2201     38.45     51     4.61     6/6     superback
5304-123-2204

5304-123-2024     38.5     51     4.61     6/6     superback
5304-123-2205     39.4     51     4.61     6/6
5304-123-2036     41.03     51     4.61     6/6
5306-123-2007     43.3     56     4.61     6/6    4.43        "2277"            
5306-123-2014     46.39    56.08    4.61    7/7    4.68 superback    "2283"

K06
5306-123-2006     45.05     56     4.61     6/6

K16
5316-123-2002     35.2     55     5.41     6/6     flatback
5316-123-2004

5316-123-2001      36.5     55     5.41     6/6     flatback
5316-123-2003

5324-123-2039     44.2     63.5     5.50     6/6    4.1     superback
"" ""        44.3     60.6     5.41     6/6     flatback


Turbine Wheels
===============
OE part number
Exducer (mm)
Tip height (mm)
Inducer (mm)
Journal (mm)
Stem (mm)
Trim Blades
Common usage

K04
5304-120-5018    44.50     5.94     50.00     6.99     4.60     12    Audi RS6 4.2 v8, Zafira OPC


Z20LET K04-0029
===============
Turbine Wheel   OE 5304-120-5018
Compressor Wheel   OE 5306-123-2007 43.3/56 6/6 , shaft bore 4.61
Bearing Housing  


VXR K04-0049
============
Turbine Wheel   OE 5304-120-5018
Compressor Wheel   OE 5306-123-2007 43.3/56 6/6 , shaft bore 4.61
Bearing Housing  OE 5304-150-0037

AUDI S3 2.0 TFSI
================
K04-2283DXBAA6.88GCAXM

Turbine Wheel    5304-120-6511
Compressor Wheel "2283"   5306-123-2014
Bearing Housing  5304-150-0067
 

[T VXT]

Sizten - thanks for all of this, although I'm still a bit lost. It looks like if you are going to get a hybrid you should go for the 5324-123-2039 compressor wheel and get the compressor housing machined to fit it. Also from the above I can't actual see what the difference between the standard let turbo (K04-0029) and the VXR (K04 -0049). I thought the vxr had a different compressor wheel?

[Nev]

Jesus that's a lot of different turbines and compressors !

[T VXT]

This chra has the big k16 compressor with a modified compressor housing to fit it in. http://www.nkkturbos...-K04/K16-Hybrid

Edited by T VXT, 10 June 2015 - 07:27 AM.

[siztenboots]

This chra has the big k16 compressor with a modified compressor housing to fit it in. http://www.nkkturbos...-K04/K16-Hybrid

 

looks like they have used this comp wheel

5324-123-2039     44.2     63.5     5.50     6/6    4.1     superback