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    Thread: 1.8 8v turbo sizing

    1. 06-01-2012 11:46 PM #1
      hey guys, looking to do a small build here.

      going to be using a standard 1.8 8v /w crossflow head, im looking for something that will put out chipped 1.8t power and torque, and have a very low rpm spool while still making 170-180 hp

      im thinking something like the k03 size, or the 1.6TD t3 setup, combined with an intercooler. perhaps a .50/.48 t3, although iirc its stll much bigger than a k03 or k04 even? maybe a T15? im not sure. i have no experience with turbo's this small.

      they do make a diesel k03 with standard 8v manifold which is very intriguing! although im not sure its the same size as the k03, and the k03s's were the ones making over 150whp anyways so it may be too small.

      i'll be stacking the gaskets with arp studs. ive had good luck with this before so i see no issues. i know alot of people frown upon it but its worked for me.




      i think i have my heart set on going megasquirt. this will be a new frontier to me, but i have a lot of experience with 034EFI so once i get used to the different software it will be a down hill roll.
      Last edited by the4ork; 06-14-2012 at 04:53 PM.

    2. Member Prof315's Avatar
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      06-02-2012 06:55 AM #2
      The K03 from a 1.8T would be a decent choice but you'll need a custom manifold for it.

      The TDI set up will bolt on but probably won't quite take you where you want as it is REALLY tiny and will start weezing at 4500-5000rpms.

      Once you get the hang of it, you'll find that TunerStudio MS is some of the best tuning software around.
      The Professor
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      92 Corrado OBD2 ABA-T (BW EFR 6258) Powered by MS3Pro
      Linfert Performance: The Megasquirt guy in central Florida Like my Facebook page....
      Sandy Linfert 11/4/1991 - 5/13/2013

    3. 06-02-2012 01:41 PM #3
      I wonder if the diesel ko3 flange is the same pattern as the 1.8t flange?

    4. Member weejunGL's Avatar
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      06-02-2012 04:02 PM #4
      Quote Originally Posted by the4ork View Post

      they do make a diesel k03 with standard 8v manifold which is very intriguing! although im not sure its the same size as the k03, and the k03s's were the ones making over 150whp anyways so it may be too small.
      what car and what year? and enginecode?

    5. Member Prof315's Avatar
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      06-03-2012 08:13 AM #5
      Quote Originally Posted by the4ork View Post
      I wonder if the diesel ko3 flange is the same pattern as the 1.8t flange?
      All of the TDI turbos I have seen are a part of the exhaust manifold. The K03 from a 1.8t will push enough air to make at least 200whp and torque. Been there, done that.
      Last edited by Prof315; 06-03-2012 at 08:16 AM.
      The Professor
      Melbourne, FL
      92 Corrado OBD2 ABA-T (BW EFR 6258) Powered by MS3Pro
      Linfert Performance: The Megasquirt guy in central Florida Like my Facebook page....
      Sandy Linfert 11/4/1991 - 5/13/2013

    6. Member -RalleyTuned-'s Avatar
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      06-04-2012 02:59 AM #6
      The stock audi 5000 turbos work very well on the 8v's. At 20psi it puts out around 230whp and is a whole heck of a lot of fun!

    7. 06-04-2012 04:23 PM #7
      Quote Originally Posted by Prof315 View Post
      All of the TDI turbos I have seen are a part of the exhaust manifold. The K03 from a 1.8t will push enough air to make at least 200whp and torque. Been there, done that.
      Wrong, k03 diesel turbos have a 3bolt flange. Vnt turbos are all integrated.

    8. Member BellCityDubber's Avatar
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      06-12-2012 12:35 PM #8
      Try to get your hands on a K24 and manifold from the 1.6TD's...
      little to no modification for it to work, and the K24 has intermediate vanes on the compressor wheel that make it breathe just a tad better than the TA03 (T3) used on other 1.6TD's.

      Shawn B has one on his 2.0L Turbo rabbit... it's a good match and quite the blast to drive.
      http://forums.vwvortex.com/showthrea...-Project/page7
      Last edited by BellCityDubber; 06-12-2012 at 12:39 PM.

    9. 06-12-2012 02:05 PM #9
      i wish his pictures worked... all i got to see was his boat project lol

    10. 06-12-2012 06:45 PM #10
      I would go with the k24 or td t3, fits good, you can use all the stock parts, oil feed, return, turbo inlet hose, oil pan, you can even use the down pipe if you really want.... will probably get you somewhere near 200 whp on 18 psi great spool time because of the small AR diesel housing. I would be willing to be that this would be the most reliable setup since all of the pieces are oem

      I would like to mention that the dyno sheet is of my friends BMW 325 ci....
      Last edited by MaxVW; 06-12-2012 at 06:48 PM.

    11. Member ACPARTSGUY's Avatar
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      06-12-2012 07:20 PM #11
      i run a gt2871r with a t3 housing on my counterflow 8v. spools quick and makes good power
      Brian

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      06-13-2012 05:44 PM #12
      Quote Originally Posted by MaxVW View Post
      I would like to mention that the dyno sheet is of my friends BMW 325 ci....
      Well look at that, he's even hotlinking the image from my host too! Stock dyno run, before headers that add ~16whp. My GLI was faster to 70mph though, but handled worse and nowhere near as nice to drive, lol.

      If you can find a K24 in good shape, it'll be the easiest to swap by far.

    13. 06-14-2012 04:54 PM #13
      Quote Originally Posted by 84_GLI_coupe View Post
      Well look at that, he's even hotlinking the image from my host too! Stock dyno run, before headers that add ~16whp. My GLI was faster to 70mph though, but handled worse and nowhere near as nice to drive, lol.

      If you can find a K24 in good shape, it'll be the easiest to swap by far.


      leaning at a k24, although i may have just stumbled upon a free passat vr so that might be hard to ignore

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