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Model specific boards => Golf mk4 => Topic started by: Chris_smith201055 on 29 August 2012, 10:29

Title: Mk4 golf 1.8t turbo questions
Post by: Chris_smith201055 on 29 August 2012, 10:29

Hi i have v reg mk4 golf on my logbook it say registered in the year 2000.
Would this mean it already has the ko3s turbo fitted as standard.
Would be greatful if any one could help
As i'm new to mk4 golfs

Title: Re: Mk4 golf 1.8t turbo questions
Post by: jamie1989 on 29 August 2012, 10:33

Take engine cover off on the left hand side of the engine near the inlet mani youl see a 3 digit engine code.

Your looking for either AGU, AUM, ARZ or AUQ.
AGU and ARZ have K03
AUM and AUQ have k03s.  :wink:

Title: Re: Mk4 golf 1.8t turbo questions
Post by: GTi_James on 29 August 2012, 10:41

Quote from: jamie1989 on 29 August 2012, 10:33

Take engine cover off on the left hand side of the engine near the inlet mani youl see a 3 digit engine code.

Your looking for either AGU, AUM, ARZ or AUQ.
AGU and ARZ have K03
AUM and AUQ have k03s.  :wink:

plus 1 for the AUM! though no end of troubles  :cry:

Title: Re: Mk4 golf 1.8t turbo questions
Post by: Chris_smith201055 on 29 August 2012, 13:21

I see its agu.i have a manual boost controler on it and it pulls quit hard on full boost if i was to get a ko3s turbo would it make much difference?

Title: Re: Mk4 golf 1.8t turbo questions
Post by: GTi_James on 29 August 2012, 13:33

KO3s as i understand is better as handles more but im still a bit wet behind the ears on that  :undecided: im sure it is better tho

Title: Re: Mk4 golf 1.8t turbo questions
Post by: jamie1989 on 29 August 2012, 13:48

First thing is to remove the manual boost controller off the car. Put the N75 back on it.
Then remove the little K03 you have replace it with K03s as its a much better turbo

K03 wont go over 200bhp
K03s will be between 210bhp upto 240ishbhp with alot of supporting mods.
The mid range torque on a K03s remapped is amazing!

Title: Re: Mk4 golf 1.8t turbo questions
Post by: golfyste on 29 August 2012, 14:13

+1 on what Jamie has said
1.8t's rely on the n75 to control the boost an using a mbc is not the way forward!
The k03s is a much better turbo and a easy upgrade from the k03

Title: Re: Mk4 golf 1.8t turbo questions
Post by: Reesy23 on 29 August 2012, 14:30

You can use both as the N75 is great at controlling part throttle boost and keeping it driveable, and the MBC would help if you were running crazy boost. If you aren't, you don't really need it.

K03s from k03 is a big difference, my mate has just had it done.

Title: Re: Mk4 golf 1.8t turbo questions
Post by: Chris_smith201055 on 29 August 2012, 15:32

Thanks for help i will get ko3s and get standard boost valve.
I bought the car a few weeks ago so i got a few mods i want to do.
Am in the middle of prepping body work ready for paint jazz blue.its got a few small dents on bonet,roof,boot,wings
Should look nice when its done.
I dnt no wether to smooth the bumpers?
Or keep it looking standard.

Title: Re: Mk4 golf 1.8t turbo questions
Post by: Granta Gti on 29 August 2012, 15:38

Where is the best place to source a nice ko3s? I called up a company today and they said we don't do ko3s as we expect too much from them and then get dissapointed!!  :laugh:

Title: Re: Mk4 golf 1.8t turbo questions
Post by: jamie1989 on 29 August 2012, 16:12

here

http://www.backdraftmotorsport.com/shop-turbos/1.8t-k03-s-turbo/flypage.tpl.html

Or take a risk and buy one second hand off ebay.
I had mine reallly cheap and its holding out perfect! Its just a risk you take.