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Model specific boards => Golf mk4 => Topic started by: danjones1994 on 06 January 2015, 15:54

Title: mk4 1.8t AUM - Turbo upgrade, which is best?
Post by: danjones1994 on 06 January 2015, 15:54
so my golf have decided it wants to cost me even more money and dont like its turbo anymore!!! smoking worse than my nan on the over-run, and yes the oil seals have gone in the turbo!!! :cry:
so instead of getting my boring ko3 turbo rebuilt im just going to buy a new bigger one!!

im thinking on getting the k04 - 023 (on the leon/tt) but thought id check if this is the best one to get or what other turbos people would recommend? im not a mechanic and dont know everything about 20vt engines so appreciate all advice given!

my cars had all relevant work done to compensate for bigger turbo so fuel pump injectors etc have all been done its just waiting turbo and ive also got a foge front mount intercooler to be fitted when turbo is complete.

thanks!! :smiley: :smiley:
Title: Re: mk4 1.8t AUM - Turbo upgrade, which is best?
Post by: MoMartin on 06 January 2015, 16:27
Isn't your car running like a bag of sh*t with bigger injectors in? Or has it been mapped to accompany them already?

Also most people say that it's better to go down the hybrid route as the full k04 setup will set you back almost the amount as just buying a bolt on hybrid
Title: Re: mk4 1.8t AUM - Turbo upgrade, which is best?
Post by: danjones1994 on 06 January 2015, 16:35
the car have already been mapped by revo making 237bhp, so its not doing too bad..
whats the hybrid turbo? thought that was just the k03-s? i dont know much about turbos or vag!! haha
thanks.
Title: Re: mk4 1.8t AUM - Turbo upgrade, which is best?
Post by: MoMartin on 06 January 2015, 16:47
Ah I thought you were saying that you had pre prepared for the bigger turbo without remapping.

And the most used hybrids are the k300 and k280 I think.
It uses the same fittings as the k03/s but it's rated to 300 odd bhp

Look them up, it's beach buggy turbo's that sells them.
Title: Re: mk4 1.8t AUM - Turbo upgrade, which is best?
Post by: danjones1994 on 06 January 2015, 20:09
Thanks for the advice ive heard alot about the hybrid turbos being the better choice now ive started to look around more so ill give them a look, and compare costs and gains etc! :)
Title: Re: mk4 1.8t AUM - Turbo upgrade, which is best?
Post by: MoMartin on 06 January 2015, 20:20
Remember that you can't go over 300 ft lb of torque unless you upgrade the rods, so keep that in mind when thinking of the cost
Title: Re: mk4 1.8t AUM - Turbo upgrade, which is best?
Post by: rio_gti on 07 January 2015, 12:53
237 bhp on a k03  :undecided:
Title: Re: mk4 1.8t AUM - Turbo upgrade, which is best?
Post by: rockmonkey69 on 07 January 2015, 13:42
237 bhp on a k03  :undecided:

I was confused by that too.
Hey Rio my remap is next Friday  :tongue: :cool:
Title: Re: mk4 1.8t AUM - Turbo upgrade, which is best?
Post by: MoMartin on 07 January 2015, 16:03
237 bhp on a k03  :undecided:

i'm guessing he means the k03s

What year is your car dan?
Title: Re: mk4 1.8t AUM - Turbo upgrade, which is best?
Post by: benmanc on 07 January 2015, 16:08
Clearly means ko3s just the 'ko3 type turbo'
Title: Re: mk4 1.8t AUM - Turbo upgrade, which is best?
Post by: danjones1994 on 07 January 2015, 18:13
im not 100% sure if its the k03 or k03/s some say its the s but others are saying its not.. im new to turbo cars and still need alot to learn! its got a printout with 237bhp but i thnk its more around the 200bhp mark, thats comparing it to a few similar cars.. i think im going with the k300 turbo now as i know a freind that rebuilds alot of VAG turbos so i trust him! im looking for 260 bhp after everyting is done.. ill be happy with that, it wont be the quickest golf but it will be quick enough!!
Title: Re: mk4 1.8t AUM - Turbo upgrade, which is best?
Post by: MoMartin on 07 January 2015, 18:20
What year is your car? If it's 2001+ its got the K03s and if it's pre 2001 it's got the k03.

260 bhp in a front wheel drive car would be insane, you'll definitely feel the difference anyway
Title: Re: mk4 1.8t AUM - Turbo upgrade, which is best?
Post by: danjones1994 on 07 January 2015, 18:30
its a 2001, but got the 2003/4 engine.. full engine swap with reciepts.
Title: Re: mk4 1.8t AUM - Turbo upgrade, which is best?
Post by: MoMartin on 07 January 2015, 19:33
You'll have the K03s then