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Author Topic: I take it a KO4 turbo is better than a KO3?  (Read 19979 times)

Offline vRSAlex

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Re: I take it a KO4 turbo is better than a KO3?
« Reply #30 on: April 07, 2011, 12:17:47 pm »
Quote from: cmdrfire on April 06, 2011, 03:07:47 pm
^^^
Stolen from GolfGTI.co.uk

Quote
Ko3 - 97-2000

COMPRESSOR WHEEL
Inducer: 33.6mm
Exducer: 46mm
Tip height: 3.7mm

TURBINE WHEEL
Inducer: 45mm
Exducer: 38mm
Tip height: 6.8mm
Blades: 11

Ko3S - 01+

COMPRESSOR WHEEL
Inducer: 38mm
Exducer: 51mm
Tip height: 4.4mm

TURBINE WHEEL
Inducer: 45mm
Exducer: 38mm
Tip height: 6.8mm
Blades: 11

Ko4-015

COMPRESSOR WHEEL
Inducer: 35mm
Exducer: 50mm
Tip height: 3.7mm

TURBINE WHEEL
Inducer: 50mm
Exducer: 42mm
Tip height: 6.4mm
Blades: 11

All that info is for the K03 turbos fitted to the 1.8T rather than the 2.0TFSi.  In part number terms, the K03s is not known by borg warner as the K03s.  Its a term made up by people to show the difference.

The TFSi cars just have a K03 or a K04.

There is no such thing as lag if you really know how to drive a car with a bigger turbo.  You drive the car in the rev range suitable for the turbo.
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Offline muckipup

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Re: I take it a KO4 turbo is better than a KO3?
« Reply #31 on: April 07, 2011, 12:32:06 pm »
Quote from: RedRobin on April 07, 2011, 11:55:37 am

You're going to enjoy that Quaife!


Yup, just got an email from JKM to say that it's on its way  :wink: I've got you to blame for this mod after our chat at the RR day  :happy2:

Quote from: BDMAlex on April 07, 2011, 12:17:47 pm

There is no such thing as lag if you really know how to drive a car with a bigger turbo.  You drive the car in the rev range suitable for the turbo.


That's the point I was trying to make in my earlier post - thanks for putting it so clearly Alex
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Offline danishmkvgti

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Re: I take it a KO4 turbo is better than a KO3?
« Reply #32 on: April 07, 2011, 01:10:21 pm »
3000rpm for the K04 is misleading, i believe that 2400rpm is more correct, and as said before, doing the K04, S3 injectors and Relocating DV as step one is possible, mine makes app. 230BHP with those stand alone parts, so looking at it as step one is okay, then take the exhaust, intake and remap later when funds permits.
If i hadn't been offered a K04 when buying the car i would have been satisfied with a K03 stage 1 and a LSD, the LSD makes the biggest difference in getting the power down and the driveability of the car, it deletes most of the understeer that the car has with bigger numbers than stock  :wink:
« Last Edit: April 07, 2011, 01:34:44 pm by danishmkvgti »
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Offline Richn83

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Re: I take it a KO4 turbo is better than a KO3?
« Reply #33 on: April 07, 2011, 01:31:42 pm »
There will still be lag (time for the exhaust gas flow to be sufficient to spool the turbo) it just wont be experienced  :laugh: on a public road that can sometimes be easier said than done!  :innocent:
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Offline joesgti

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Re: I take it a KO4 turbo is better than a KO3?
« Reply #34 on: April 07, 2011, 07:47:34 pm »
Quote from: cmdrfire on April 07, 2011, 11:22:49 am
Quote from: Janner_Sy on April 07, 2011, 08:36:43 am
has anyone ever just considered putting the k04 turbo, injectors and DV relocation on as the first mod.  with a map that would give you 280-300hp. 

If the remap costs you £600, turbo costs you £800, the DV relocation £200 and the injectors £200 that would still be cheaper than going stage 2+ on the k03 turbo with stage 2+ remap, TBE, Intercooler, HPFP, and discharge pipes.

then at a later date you could add the exhaust and intake etc

I think that the intake and exhaust mates for the K04 are different than for the K03/s - hence requiring a different intake and exhaust anyway. May be wrong on that though, happy if someone has more information.

KO4 requires a 3" downpipe, KO3 is a 2.75" downpipe,

I used a 2.75" on my ed30 engine and managed 343bhp on the rollers so it can still be used with good gains. 
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Offline gazon69

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Re: I take it a KO4 turbo is better than a KO3?
« Reply #35 on: April 07, 2011, 08:00:04 pm »
I have a 3" miltek downpipe bolted to my k03. fitted straight on with no problems. think you'll find that ed30 and gti run 2.75" exhausts as standard.
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Offline seiko

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Re: I take it a KO4 turbo is better than a KO3?
« Reply #36 on: April 07, 2011, 09:17:09 pm »
I find the ko3 in my gti revo remapped stage 1 a little belter, point to point I love it, also have a Nissan skyline gtr twin turbo and it does not going until you hit 2700 rpm then you take off, but still love driving the gti more :smiley:
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Offline damoegan

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Re: I take it a KO4 turbo is better than a KO3?
« Reply #37 on: April 07, 2011, 09:42:02 pm »
Quote from: BDMAlex on April 07, 2011, 12:17:47 pm
Quote from: cmdrfire on April 06, 2011, 03:07:47 pm
^^^
Stolen from GolfGTI.co.uk

Quote
Ko3 - 97-2000

COMPRESSOR WHEEL
Inducer: 33.6mm
Exducer: 46mm
Tip height: 3.7mm

TURBINE WHEEL
Inducer: 45mm
Exducer: 38mm
Tip height: 6.8mm
Blades: 11

Ko3S - 01+

COMPRESSOR WHEEL
Inducer: 38mm
Exducer: 51mm
Tip height: 4.4mm

TURBINE WHEEL
Inducer: 45mm
Exducer: 38mm
Tip height: 6.8mm
Blades: 11

Ko4-015

COMPRESSOR WHEEL
Inducer: 35mm
Exducer: 50mm
Tip height: 3.7mm

TURBINE WHEEL
Inducer: 50mm
Exducer: 42mm
Tip height: 6.4mm
Blades: 11

All that info is for the K03 turbos fitted to the 1.8T rather than the 2.0TFSi.  In part number terms, the K03s is not known by borg warner as the K03s.  Its a term made up by people to show the difference.

The TFSi cars just have a K03 or a K04.

There is no such thing as lag if you really know how to drive a car with a bigger turbo.  You drive the car in the rev range suitable for the turbo.

Thats what I was just going to say too, Alex..
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Offline micky 32

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Re: I take it a KO4 turbo is better than a KO3?
« Reply #38 on: April 08, 2011, 08:38:51 pm »
I actually never noticed anymore lag going to Ko4 so it must be minimal. It's definately worth doing. It's way more fun than when i was stage 2+ Ko3.
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golfecho5

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Re: I take it a KO4 turbo is better than a KO3?
« Reply #39 on: April 08, 2011, 11:50:46 pm »
Red Robin, you summed it up there.

Once the K03 is on full tune with the right kit I don't think you're far off the perfect car for front wheel drive apart from the standard handling.
Half the power with twice the handling wins most of the time on lap times, well on shorter circuits anyway, might struggle at the N'burg ring though.

I'd take the K04 at N'burg everyday though with the good handling.





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Offline Janner_Sy

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Re: I take it a KO4 turbo is better than a KO3?
« Reply #40 on: April 09, 2011, 12:50:49 pm »
it wont go round the bends any faster though, and you'll still be managing speeds on the straights that you wouldnt have a chance of making on a normal circuit
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Offline Snoopy

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Re: I take it a KO4 turbo is better than a KO3?
« Reply #41 on: April 09, 2011, 03:28:25 pm »
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Offline Sunglasses Ron

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Re: I take it a KO4 turbo is better than a KO3?
« Reply #42 on: April 10, 2011, 09:37:19 am »
Quote from: berg on April 05, 2011, 09:48:15 pm
Quote from: stealthwolf on April 05, 2011, 09:30:51 pm
Aye. K03 spools up at around 1750 and K04 is nearer the 3000 rpm mark.


Would i be right in thinking then that because of this the stock edition 30 is only marginally quicker to 60 than the stock Gti because the KO3 is prob a fraction quicker to say 30?

There is no way a KO3 is better at 0-60 than a K04 because it spools up faster.. Unless of course you do a 0-60 sprint by launching the car from idle..  :laugh:
A 0-60 sprint will be done with revs at 2500 and above, so it won't matter whether it's a Ko3 or Ko4. Where the Ko3 will pick up better is during in gear acceleration (especially when in a high gear at low speeds). But lets be honest lads, the Ko4 is hardly a lag monster..

The turbo on Specky's Tigra (fastest FWD car in the country) doesn't come on boost till 6500rpm.. :surprised: Now that's laggy..  :signLOL:
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