mk3 ibiza cupra k04

[elliot_richards]

thinking of replacing the k03s turbo on a ibiza cupra for a s3 k04?

is it a worth while modification and how hard is it?

im a qualified mechanic so i know my way around an engine bay but no nothing about the tuning of 1.8 20v turbos, i.e how they respond to different modifications ect..

would a k04 bolt onto the standard manifol?

would it run okay on standard internals?

would a 3'' down pipe and centre section be alright to use?

what programming would be required to run optimum performance/ would a stage 2 map be enough?

please let me know if theres anything else that would be required to do the conversion.
not aiming for massive figures

car is already running 205bhp

 

[ibizacupra]

thinking of replacing the k03s turbo on a ibiza cupra for a s3 k04?

is it a worth while modification and how hard is it?

im a qualified mechanic so i know my way around an engine bay but no nothing about the tuning of 1.8 20v turbos, i.e how they respond to different modifications ect..

would a k04 bolt onto the standard manifol?

would it run okay on standard internals?

would a 3'' down pipe and centre section be alright to use?

what programming would be required to run optimum performance/ would a stage 2 map be enough?

please let me know if theres anything else that would be required to do the conversion.
not aiming for massive figures

car is already running 205bhp

K04 wont bolt onto K03 manifold
you would need complete K04 setup, including downpipe, manifold, oil/water lines and TIP
also 80mm MAF, 386cc injectors + map

 

[elliot_richards]

Spot on, is it a worth while modification?

 

[ibizacupra]

if you can get the whole lot fro decent £ and know the turbos in good shape.. yes..
otherwise go hybrid k03 and depending on spec you can achieve more than a k04 (std)

 

[elliot_richards]

I understand that there's several different 1.8 20v turbo engines, ranging from 150-225bhp I had an idea of getting a 225 s3 engine in the Ibiza? Would have more potential, could reach 300bhp easier than the standard engine?

 

[yellonvi-R]

All the engines are basically the same! It's the turbo size that gives them the bhp.

Ko3=golf Gti, Ibiza Cupra, Ibiza Cupra R, early leon Cupra. All 150bhp
K03s=2002 onwards golf Gti? Leon Cupra, audi tt, all 180bhp
K04=Audi s3, leon Cupra R, audi tt 225 quattro all either 210 or 225 bhp! Both map to the same bhp.

K03 turbo will max out at 200bhp give or take, the k03s 245bhp give or take and the k04 270-80 give or take! But all the 1.8t engines are capable of producing the same bhp as each other if there running the same turbo.

Easiest way to get good power is buy a k03 hybrid as its a straight swap for a k03 and you will only need a remap and a new tip and 3inch maf. There's a hybrid on eBay forsale at the mo.

 

[Pimped up vario]

Some nice info yellonvi-R. I know what to aim for now when getting a remap. Thanks.

 

[elliot_richards]

Great bit of info appreciate it, are the 3" maf sensor off a Leon Cupra r or a s3?

 

[yellonvi-R]

Both

 

[ibizacupra]

Great bit of info appreciate it, are the 3" maf sensor off a Leon Cupra r or a s3?

you must use narrowband sensor element with ibiza ecu

 

[elliot_richards]

its either hybrid a k03s or put a k04 on maybe hybrid'd too, thing is with hybrid'ing turbos it will bring the boost in later and increase lag :/

 

[ibizacupra]

thing is with hybrid'ing turbos it will bring the boost in later and increase lag :/

lol



they dont

 

[yellonvi-R]

Hahaa crazy, ive broke a few k04 hybrids and there was no lag from them if there mapped good then shouldnt be an issue. And as for coming in later its not vtec!

 

[Pimped up vario]

I suppose it's all in how they have been done and the work performed on them. Some people define a hybrid as a non standard turbo unit that incorporates some degree of alteration from original manufacturers intended specifications via machining of turbine/compressor wheels, modification of bearing type, and combination of different hotside and compressor housings and the variations of wheel that can be mated to that housing.

The alterations to allow larger volumes of flow at higher rpm values such as cut back turbine wheel can have the effect of reducing the turbos ability to spool up earlier than before the alteration was applied.

Ball bearing conversion from thrust bearing can offset the effects of cut back turbine wheel as due to reduced internal fictions the wheel assembly is able to spool up at an earlier engine speed.

A hybrid does have the potential to cause a later boost point than a standard turbo but if it's done a certain way the likely hood is that you could do an engine build with 300bhp that has a perceived boost point that's only slightly later than a stock turbo.

Although define slightly later. It could be that peak turque is 500rpm later than a stock turbo but the setup is making what the stock setup did at the same rpm and more torque at it's own peak torque rpm level.

 

[elliot_richards]

Would it be a struggle to do change the turbo while the engines still in the car?

 

[Chambers_CUPRA]

Mine atm

Lots of work

 

[elliot_richards]

So your going to struggle getting the old turbo and manifold off with the engine in place then haha

 

[yellonvi-R]

To help undo the front subrame and the engine will lean forward gives you more room down by the turbo.

 

[ibizacupra]

Would it be a struggle to do change the turbo while the engines still in the car?

k03 framed not bad.. ex mani off then access to turbo simple

 

[Chambers_CUPRA]

My heads off because im doing rods and relentless manis are hard to fit lol