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Discussion Starter #1
I know the diesel guys are having a field day with upgrading to larger turbo's on their 1.9's and 2.4's.

What would you guys suggest for the GQV?

The turbo and the manifold are one piece...current turbo is k04 by Borg Wagner 55231460.

We are thinking possible hybrid conversion.
 

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Im interested in this too.

However have you considered the life of the components, clutch gearbox etc? Not sure of their safe limits, not been able to find out much info yet.

I see ur running a fair bit more bhp and torque, any problems with clutch slipping yet?

I just sent an email to

http://www.turbodynamics.co.uk

see if they have any info
 

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Discussion Starter #3
I already sent an email to turbodynamics and they have not yet worked with a k04 Borg Warner form a GQV..so they won't know.

My clutch has not slipped yet not any gearbox strains...my power delivery is all marginal and in line with the stresses of the turbo.

BiancoAuto on here had their GQV turbo "hybrided" and the guy who did the hybrid upgrade said the GQV is at max at 1.4bar...my car's max boost is 1.4bar.

I'm looking for more power after 4500rpm. When you drive your GQV, look at your boost gauge, boost starts dropping off when you hit 4500rpm and it drops QUICK!!!

This is the design of the GQV turbo, thus your GQV will deliver power from insanely low revs but die off at speed, this is the design limitations.
 

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Got ya

Personaly I like to have more power at the top end, dont mind a bit of turbo lag to get it either.
 

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I have been watching this with interest, has anybody got any pictures of the turbo they could post? I have not seen one if these yet and the Borg Warner data system does not list any bill of materials, and google doesn't throw up a lot either... Not much to work with!
It's pretty rare to find a turbo that can not be upgraded in one way or another, just holding the parts for machining which can throw up problems occasionally...
 

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Hi Simon,



Thanks for your enquiry, the K04 turbo from the Giulietta is not a turbo we've come across before so we don’t have any upgrade options available at present.



I've just spoken with our contact at Borg Warner and we are unable to source units for these cars at present so the only way forward would be an upgrade to your existing turbo. Having said that there are no guarantees that a decent upgrade is indeed possible from the standard turbo. A catch 22 situation!



Kind Regards

This is the responce, however I live localy to these guys so I might pop down when i have some time off
 

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Il nostro catalogo online | Contec

^ makes for useful reading.

From what I can gather the 55224275 which was replaced by the 55232225 is a 5303-970-0149 K03 turbo. 200 bhp.

The 55224276 replaced by 55231460 is a 5304-970-0090 K04 turbo. 230 bhp. The pics from Ian are of the K03 so we still are in the dark on the K04. (Looks like the K03 would be fairly straight forward to upgrade but not sure you would want to given the trouble he seems to have had with it...)

I can not find anything on the K04. Searched google, Borg warner, core suppliers... Can anyone get any better pictures?
 

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Discussion Starter #9
We are waiting for pics from an SA member who's k04 popped recently, so well see, I've asked him to ask the dealer Marcie's to measure the inlet etc
 

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If I'd upgrade this unit, I'd cut the manifold from the turbo, weld a flange to it and fit a Garrett turbo.
Much more possibilities then.

A GT2560R looks like a nice unit for such a displacement.
 

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Really? K03 and K04 turbo's are on a lot of VAG turbo engines (Golf GTI has K03, Golf R has K04, Audi S3 has K04), and they go way further modifying those engines and turbo's than the average Alfa owner. So you should expect way more upgrade posibilities for this turbo?
 

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a quick google
The Audi TT Forum :: View topic - K04 hybrid turbo - anyone done it?
what hp are you after?
looks like manifold becomes choke point near std turbo limits anyway, at least on info from these tt to4 guys.
I would imagine that t04 is just a family name and within that frame size there are lots of turbine and compressor trim combinations. you need to find out at which end of the scale your t04 is already, if its already largest turbine exducer and compressor inducer there may be little to gain from hybrid.
of course some one in the thread above says a t06 internals would fit, but need better manifold to gain the most increase.
one guy quotes
Im running a IHI VF22 which comes on the Subaru Impreza type 22b, Yes there is lag but my rpm has been increased to 7500rpm. The increased rpm makes up for that lag which isnt noticable. :)
some stuff for you guys to mull over hope it helps
 

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Discussion Starter #13
You guys must not confuse the VAG k04 version with any other k04 on the market. Its various different k04's for various reasons, AR wanted LOW down power and torque...at a cost!

Its not the same turbo as a VAG k04.

But I'm sure it can be made to work, we've got the inletdiameters for the GQV k04 Air inlet - 48mm
Air to motor - 43mm
Exhaust - 73mm

I haven't had time to read the above links so forgive me if the answer is in there. Ill do some more researchs as to a possible swop upt to higher spec k04? Maybe a hybrid of the curent GQV k04 can be done?

What I after is higher flow after 4500rpm
 

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Discussion Starter #14
a quick google
The Audi TT Forum :: View topic - K04 hybrid turbo - anyone done it?
what hp are you after?
looks like manifold becomes choke point near std turbo limits anyway, at least on info from these tt to4 guys.
I would imagine that t04 is just a family name and within that frame size there are lots of turbine and compressor trim combinations. you need to find out at which end of the scale your t04 is already, if its already largest turbine exducer and compressor inducer there may be little to gain from hybrid.
of course some one in the thread above says a t06 internals would fit, but need better manifold to gain the most increase.
one guy quotes
Im running a IHI VF22 which comes on the Subaru Impreza type 22b, Yes there is lag but my rpm has been increased to 7500rpm. The increased rpm makes up for that lag which isnt noticable. :)
some stuff for you guys to mull over hope it helps
Exactly!

Ill read the link later, thanks
 

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take it to an exhaust shop, build a decent header for it (or cut the original and weld a T28 Flange to it)
then you can go the normal way aka. garrett gt2560R - enough for 330 HP on a 25 Year old 1.8 DOHC with little to no turbo lag an early spool... or go gt2860 or borg warner fancy with ceramic blades this one uses rhe same flange system as the diesel turbos from turbine to downpipe (dont know how this is called)....
 

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You guys must not confuse the VAG k04 version with any other k04 on the market. Its various different k04's for various reasons, AR wanted LOW down power and torque...at a cost!

Its not the same turbo as a VAG k04.

But I'm sure it can be made to work, we've got the inletdiameters for the GQV k04 Air inlet - 48mm
Air to motor - 43mm
Exhaust - 73mm

I haven't had time to read the above links so forgive me if the answer is in there. Ill do some more researchs as to a possible swop upt to higher spec k04? Maybe a hybrid of the curent GQV k04 can be done?

What I after is higher flow after 4500rpm
Bianco Auto have had one modified to be able to push out 350bhp, so all looks possible - just a case if finding the right people to do the job I guess
 

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Discussion Starter #17
Yes, I've not heard more feedback from Bianco Auto...where have you heard of the 350bhp hybrid GQV turbo they had???
Phil, you are right, I guess it will all start once the turbo is off the car.

I had the plan to speak to my dealer and tell them my plans and hear what type warranty will be lost, I'll accept all risk but don't want to lose warranty on suspension or lights or interior parts for example, also don't want to lose service plan etc.

But a hybrid turbo should be virtually impossible to spot.

I'm quite excited about this, just need to decide on a proper plan and proper people to do the job...so lots of research still to do, but it can be so easier if Bianco Auto were to share what they did and what boost they are running...but.....
 

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Yes, I've not heard more feedback from Bianco Auto...where have you heard of the 350bhp hybrid GQV turbo they had???
Phil, you are right, I guess it will all start once the turbo is off the car.

I had the plan to speak to my dealer and tell them my plans and hear what type warranty will be lost, I'll accept all risk but don't want to lose warranty on suspension or lights or interior parts for example, also don't want to lose service plan etc.

But a hybrid turbo should be virtually impossible to spot.

I'm quite excited about this, just need to decide on a proper plan and proper people to do the job...so lots of research still to do, but it can be so easier if Bianco Auto were to share what they did and what boost they are running...but.....
They're very close to me - I'm going to book my 159 in with them to get my Eibach Pro-kit fitted soon, hopefully I'll be able to find out more then
 

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Discussion Starter #19
Ah please, it would be great if info like this is shared, I know they used a 360 thrust bearing and I think a different compressor wheel...but that's all they said.

When the people who did the hybrid on the GQV k04 saw the turbo, they said its rated for 1.4bar max...
 
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