1.8 8v turbo sizing

[the4ork]

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.

[Prof315]

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.

[the4ork]

I wonder if the diesel ko3 flange is the same pattern as the 1.8t flange?

[weejunGL]

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?

[Prof315]

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.

[-RalleyTuned-]

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!

[the4ork]

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.

[BellCityDubber]

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

[the4ork]

i wish his pictures worked... all i got to see was his boat project lol

[MaxVW]

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....

[ACPARTSGUY]

i run a gt2871r with a t3 housing on my counterflow 8v. spools quick and makes good power

[84_GLI_coupe]

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.

[the4ork]

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