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ko3s turbo upgrade agu, HELP PLEASE

Discussion in 'A3/S3 Forum (8L Chassis)' started by Steve Wilson, Nov 8, 2011.

  1. Steve Wilson
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    Steve Wilson New Member

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    [Nov 8, 2011]
    hi there i have just blown my ko3 turbo on my 150 agu, been told its best to put a ko3s on but not sure if i need to change anything else or if they just fit straight on? any help would be much appriciated
    cheers steve
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  3. 16Klappe
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    16Klappe RacecaR forward is RacecaR backwards. Supporter

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    [Nov 8, 2011]
    Ko3s, just fit him straight on.

    Use new gaskets, and replace the washers/seals on the oil lines, buy some new stretch bolts off Audi or Badger 5 and job's a goodun :)

    Then get yourself a remap!
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  4. Steve Wilson
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    Steve Wilson New Member

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    [Nov 8, 2011]
    thanks alot mate, would it still run as normal before a remap? because was planning on investing in a exhaust, air intake and maybe front mount, would it be better to do remap after? and have also been told about changing the tip? cheers steve
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  5. 16Klappe
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    16Klappe RacecaR forward is RacecaR backwards. Supporter

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    [Nov 8, 2011]
    The run down of mods, in this order is -

    Get a KO3s fitted.

    Air filter (phone Bill at Badger 5 and get a Jetex off him).

    Forge 007P.

    TIP.

    Oil filter, oil (ONLY use VW Quantum) and cambelt along with a metal water pump.

    Stage 1 map, should see you 220bhp with a healthy engine and NO boost leaks.

    Decat/Downpipe.

    Front Mount Intercooler.

    S3 brake discs and carriers on the front.

    PCV Delete.

    S3 Spark Plugs (go NGK).

    Stage 2 map, should see 230/235BHP and a LOT more power throughout the rev range.

    For suspension mods 90% of people go for the ebay Jamex £220 coilovers with new top mounts, then throw a rear ARB on it and you will have a nice sorted car.

    For the remaps I would really recommend Nick at R-Tech, proper good service and he seems to be able to squeeze the best power out of his cars.
    Last edited: Nov 8, 2011
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  6. Steve Wilson
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    Steve Wilson New Member

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    [Nov 8, 2011]
    thanks alot for your help, cheers steve
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  7. Steve Wilson
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    Steve Wilson New Member

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    [Nov 8, 2011]
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  8. Prawn
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    Prawn My other car is a MINI!!!!

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    [Nov 8, 2011]
    you won't see 220 without a downpipe, 205-210 TOP whack, more often closer to 205 though. Add in a downpipe and decat and 220ish is easily possible. Over that you're pushing it, 230 can happen, but it's not consistent at those levels as Jarrod will tell you
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  9. Steve Wilson
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    Steve Wilson New Member

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    [Nov 8, 2011]
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  10. 16Klappe
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    16Klappe RacecaR forward is RacecaR backwards. Supporter

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    [Nov 8, 2011]
    Your car made 224 on Bills rollers with a 007p and an air filter didn't it? Or did you have a de-cat then too?

    Also, I'll more than happily comment on the reliability issues of running 230BHP+ on a KO3s. If you want big power you need a big turbo, big airflow at low boost = infinitely safer than a small turbo at high boost.
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  11. Steve Wilson
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    Steve Wilson New Member

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    [Nov 8, 2011]
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  12. Steve Wilson
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    Steve Wilson New Member

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    [Nov 8, 2011]
    is the ko3-052 the same as the ko3s? because the one i have seen says ko3-052 for a3 1.8t auq/arz 2000-03 180bhp? is this the turbo i need and would it fit 1998 agu? cheers steve
    [h=1][/h]
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  13. Prawn
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    Prawn My other car is a MINI!!!!

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    [Nov 8, 2011]
    had a decat on as well Jardo.

    Steve, that's the turbo you need yes :)

    new gaskets, bolts, and crush washers required to fit it, only a few quid from audi
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  14. Steve Wilson
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    Steve Wilson New Member

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    [Nov 8, 2011]
    thanks alot guys been a really big help, can hopefully get it back on the road soon now, thanks again steve
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  15. Steve Wilson
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    Steve Wilson New Member

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    [Nov 8, 2011]
    i have just ordered that turbo, what gaskets, bolts and washers should i change aswell? cheers steve
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  16. Paradox1
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    Paradox1 Active Member

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    [Nov 8, 2011]
    yes change the lot mate
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  17. Steve Wilson
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    Steve Wilson New Member

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    [Nov 8, 2011]
    any ideas wheres best to order these from?
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  18. takworldwide
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    takworldwide Member

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    [Nov 8, 2011]
    TPS or Audi dealer mate, where did you get your turbo from as im also on the hunt for a K03s
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  19. Steve Wilson
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    Steve Wilson New Member

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    [Nov 9, 2011]
    cheers mate and toyosport type it in google pal
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  20. Superpotter80
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    Superpotter80 New Member

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    [Nov 9, 2011]
    I brought my ko3s from toyosports,got it out the box checked the impeller to find it had movement in and out on a brand new turbo so be sure to check it first,they sent me another one and it's all good
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  21. Superpotter80
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    Superpotter80 New Member

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    [Nov 9, 2011]
    One problem I had with fitting was the oem tip did not fit onto the compressor housing,I ended up machining mine out as I needed to be on the road that same day
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  22. Steve Wilson
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    Steve Wilson New Member

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    [Nov 9, 2011]
    ok thanks for the heads up will check before fitting
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  23. Jay A3
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    Jay A3 More power

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    [Nov 17, 2011]
    Just reviving this thread back up...Im also looking to do a turbo upgrade on my 1.8t agu... will be getting my hands on the ko3s turbo and the oem tip soon. I will look into getting the gaskets and bolts as suggested in the earlier posts. I did get an advisory about maybe upgrading my maf to a vr6 one and my injectors to the ones from the vauxhaul calibra turbo yellow...
    I currently have 205cc ones i think running on a 4bar, i can get my hands on the 1.8 tqs maf and injectors which are 282cc... would they work? Or keeping my standard maf and injectors is more than enough? Let me know your thoughts guys...
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  24. 16Klappe
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    16Klappe RacecaR forward is RacecaR backwards. Supporter

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    [Nov 17, 2011]
    Your standard MAF and injectors is enough for a KO3s.

    187GPS is the maximum your MAF can read, which equates to roughly 230/235BHP, which is just about what a KO3s will flow before sounding like mine does and making the turbine and housing quite friendly. (F**ked).

    The TQS/facelift car's MAF won't work because the plug is different and the injectors are pointless, because you won't be needing to go any higher than your current injectors can give. Going up to the 282CC Injectors will be wasted money, because a KO3s won't be quick enough and you'll have to put bigger ones on for a hybrid anyway.

    I have maxed my turbo (ko3s), maf and injectors on my car and there is nothing I can do to make it go faster other than upgrading all three at once and going for a hybrid. The three are all very closely linked.

    I suggest you buy some Genesis 550CC injectors, a VR6 MAF and put them aside then save up for a KO3s hybrid. (£700+/- & Mapping & £350/450)
    Last edited: Nov 17, 2011
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  25. Jay A3
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    Jay A3 More power

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    [Nov 17, 2011]
    Thanks a lot dude, i am only aiming to get about 225/230bhp with the ko3s and remap... and just run it like that. I would love to go for the hybrid but i feel it will be to much as i also use this as a daily. Any benefit if i only upgrade the maf to the vr6 and keep my current injectors? Good luck with the hybrid setup mate!
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  26. 16Klappe
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    16Klappe RacecaR forward is RacecaR backwards. Supporter

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    [Nov 17, 2011]
    You will get 230BHP, have a look for my project thread. My spec is what you need for 230bhp+.

    The VR6 MAF will add a little I guess, but the cost of mapping would IMO rocket the costs up to making it not worthwhile.

    Here's an interesting read on what Nick at R-Tech has to say after a LOT of criticism over this 248HP Ko3s dyno plot on ClubGTI -

    [​IMG]



    The car was the following spec -

    Last edited: Nov 17, 2011
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  27. s3dave
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    s3dave TFSI Hybrid Supporter

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    [Nov 17, 2011]
    The TQS running the ko3s runs 282 injectors so they must need it top end?@ 180bhp,
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  28. 16Klappe
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    16Klappe RacecaR forward is RacecaR backwards. Supporter

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    [Nov 17, 2011]
    Doesn't matter, it's the same engine as you would get in an A3 with a different map and some half arsed 4wd ****. They changed injectors from EV6 to EV12 fitment injectors which happened to be bigger.

    It's basically an S3 without the snobbery.

    :lmfao:
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  29. s3dave
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    s3dave TFSI Hybrid Supporter

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    [Nov 17, 2011]
    Have you had your fuelling checked top end?.....:)
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  30. 16Klappe
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    16Klappe RacecaR forward is RacecaR backwards. Supporter

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    [Nov 17, 2011]
    Mines fine top end, it's middle it suffers :)
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  31. Reesy
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    Reesy Well-Known Member VCDS Map User

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    [Nov 17, 2011]
    Could be your injectors...
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  32. 16Klappe
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    16Klappe RacecaR forward is RacecaR backwards. Supporter

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    [Nov 17, 2011]
    The EV12 injectors don't fit an AGU inlet though, I'll be getting some yellow top LET injectors which are EV6 and 306CC.
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  33. Reesy
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    Reesy Well-Known Member VCDS Map User

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    [Nov 17, 2011]
    so their is a need to change your injectors....
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  34. 16Klappe
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    16Klappe RacecaR forward is RacecaR backwards. Supporter

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    [Nov 17, 2011]
    Not now there isn't, in a years time when I have a hybrid there will be. :)
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  35. jay1
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    [Feb 5, 2012]
    hi i have a agu 1.8 t and am going to install a k03s turbo as i have read it bolts straight on, my car should have 150bhp, without a remap and just installing the k03s turbo what will be the power gain thanks!
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  36. 16Klappe
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    16Klappe RacecaR forward is RacecaR backwards. Supporter

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    [Feb 5, 2012]
    You won't get any power gains without a remap.

    Your vehicles stock ECU is mapped to give 150bhp, the K03 more than easily delivers this, fitting the K03s will still give you 150bhp but it will give you the scope to 230+bhp with mapping where as a K03 wiill never give more than 200.
    Last edited: Feb 5, 2012
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  37. jay1
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    [Feb 5, 2012]
    hi thanks for that so maybe just a remap will do rather than the hassle of finding and installing a k03s how much is a remap? and i live in bedfordshire anyone recommend anywhere?
    #36
  38. 16Klappe
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    16Klappe RacecaR forward is RacecaR backwards. Supporter

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    [Feb 5, 2012]
    If your car is healthy, a stage one remap will see you the right side of 190BHP.

    The Revo website will tell you what to expect and what you will need, as well as your local mappers.

    Revo | Audi

    There are many companies and tuners who will remap the 1.8t, I suggest you do a good search and find out more information. I am a little surprised that you were contemplating changing your turbo, given that you are unaware of even the costings of a remap. There are 100's of threads on this forum which will detail exactly what you need to do and what to expect from modifications. Have a good read of the FAQ post at the top of this forum and you should learn a lot. :thumbsup:
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  39. paultownsend
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    [May 24, 2014]
    Thread resurrection chaps!

    my AGU is currently mapped with a k03. I am bolting on a k03s next week, will I be ok running it as is, or shall I unplug the n75.

    I am am going to buy a new wastegate from BBT. Shall I got OE spec, 10 or 15psi?

    i am going to Rtech for the map. Spec is-

    piperX panel in oe box opened up at the mouth
    Forge tip
    OE 710n
    ths fmic
    3" dp decat
    tdi centre section,OE back box

    These are all stage 2 parts except the exhaust. I don't really want to change it as I like the car quiet. How much do you think the OE back box will effect results?

    regards
    #38
  40. Joshstan
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    [May 24, 2014]
    Tbh the main exhaust restriction is the silly down pipe so with the decat and centre section you shouldn't have to change the back box as far as actuator is concerned I was running a forge one on my ko3s golf but oe spec will do fine it's just the oe ones get very weak
    That said there is no harm buying an up rated one
    When you put the ko3s on best practice is to unplug the n75 because of the higher flow you don't wanna end up running lean but best of luck with the upgrade it's lots of fun on stage 2
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  41. paultownsend
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    [May 25, 2014]
    Any other thoughts chaps? Does the AGU not adjust all fueling from the maf?
    So new turbo sucks in more air, so ecu pumps in more fuel?
    #40

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