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tweetyturbo
10-06-2010, 11:17 PM
Hello all, i am new to the site and drive a 2001 a4 1.8t. I need some much needed advice on a turbo upgrade kit. I have searched but i want your personal preferance.
I was planning on going with a GT2X bolt on turbo kit, but I am open to all sugguestions. I want DD driveabilty, but also something i can open up and have fun with on the back roads. [drive]
I know the supporting mods to get I am just torn between the turbo options. All input is much appreciated.
what do you reccomend?

austinjmiller
10-06-2010, 11:43 PM
I just installed a GT2X and like it a lot! I was going to get a K04 but ran across a good deal on this turbo.
Im running it with APR stage 1 right now and Im in the process of getting a new tune (anyone who wants to recommend a good tune feel free).
If your going to get a GT2X make sure you get the oil and water cooled one!
You should probably do all the supporting mods first.... Im now playing catch up with all the supporting mods that the turbo needs.

VAG-COM is one thing you should consider first!!! Its always good to be able to log! That way if you ever have a problem you can post logs and more than likely people can help you out!

tweetyturbo
10-06-2010, 11:59 PM
first of all thank you for the fast reply! I am definately gonna get the supporting mods im just shopping around right now making sure im %100 about the setup i wanna get.
If i do go with the GT2X what size injectors would you recommend, and would i need to upgrade my fuel pump along with it?
And what GIAC software should i run with it?

sorry bout the semi noobish questions, former honda guy here...but ive moved on to bigger and less ricey things!

austinjmiller
10-07-2010, 12:12 AM
Ive been getting mix replies with software...
There's a GIAC ECU for sale that a guy ran with his GT2X. It's a BT setup with 415cc injectors that's tweaked to run with his GT2X.
I've also heard of people running APR K04 software with a MBC and the stock 386cc TT injectors (which is what Im leaning towards now b/c I already have APR stage 1)
And Im also talking to a local REVO dealer to see what he has to say about everything haha...
I think for the B5 you need to get a different fuel pressure regulator but im not sure on that one...

I really hope some more people chime in because Im really interested what everyone else has to say... I searched a lot and couldn't find to much on the GT2X...

tweetyturbo
10-07-2010, 12:26 AM
hmm from what ive heard APR wasnt compatible with K04's...but thats not important lol

ya it really seems like the GT2X isnt so popular, people tend to lean towards GTRS or GT28's
I like the smooth power band of the GT2X, seems good for DD and ocassional fun!

thank you for the info

austinjmiller
10-07-2010, 12:27 PM
APR makes a K04 kit and software as well....
Yea a GTRS or GT28 would be fun, But the deal I came across for a used turbo with ~10k miles on it was good...

He's some alright info on some turbos if you havent found this already..
http://www.audizine.com/forum/showthread.php/179590-K04...GT2X...GT28r...GTRS-GT28rs-Official-Turbo-Comparison

tweetyturbo
10-07-2010, 12:46 PM
ya i read all that yesterday thank you

Im really interested to see what others think!

nunya
10-07-2010, 01:16 PM
APR makes a K04 kit and software as well....
Yea a GTRS or GT28 would be fun, But the deal I came across for a used turbo with ~10k miles on it was good...

He's some alright info on some turbos if you havent found this already..
http://www.audizine.com/forum/showthread.php/179590-K04...GT2X...GT28r...GTRS-GT28rs-Official-Turbo-Comparison


APR does not make K04 software for our cars. I swear i have to correct people on this every week. Tell me where on this page it says anything about K04.

http://www.goapr.com/products/?vehicle=A4_B5

or this one

http://www.goapr.com/products/ecu_upgrade_a418t.html

They do make a kit for transverse motors.

http://www.goapr.com/products/tvk04.html

--dillon

Doug@FrankenTurbo
10-07-2010, 04:35 PM
GIAC and Unitronic both offer files for your car's ECU. While I'm not sure GIAC's file really will push the hardware enough to justify the expense of a GT2X, Unitronic's Stage 2+ is definitely more aggressive than a plain ole K04-015 can handle. You can find some logs in this thread here (http://www.audizine.com/forum/showthread.php/390623-My-current-setup.-Stage-2).

tweetyturbo
10-07-2010, 05:44 PM
Ive been looking at Unitronic's site and i was reccomended to the 415cc BT software. Any thoughts on how that would run with the GT2X?

Doug@FrankenTurbo
10-07-2010, 07:25 PM
It runs well. But the 415cc fueling file is expensive compared to the Stage 2+, and the GT2X runs comparably on the 380cc fueling Stage 2+ file. It's not that big of a turbo.

tweetyturbo
10-07-2010, 07:46 PM
alright ill check that out
would i need to swap my fuel pump or fuel pressure regulator?

austinjmiller
10-08-2010, 07:57 AM
APR does not make K04 software for our cars. I swear i have to correct people on this every week. Tell me where on this page it says anything about K04.

Sorry I forgot he had a B5 I have a B6 thats what I was referencing off of... My bad!

ZimbutheMonkey
10-08-2010, 07:49 PM
And since Slappy hasn't beeped his own horn I'll chime in. If you haven't already bought supporting mods like a high flow manifold, inlet pipe etc... I'd recommend a Frankenturbo kit http://frankenturbo.com/F4h-l.html. The numbers I've been seeing suggest it's pretty close to a GT2X and you can get a full kit for $1100 which is less than the $1400 a GT2X alone will run you. Use the $300 difference to buy some injectors and you're stylin'.

Doug@FrankenTurbo
10-08-2010, 08:25 PM
alright ill check that out
would i need to swap my fuel pump or fuel pressure regulator?

If you're open to the investment for an in-line Walboro I think it's a sound idea. Odds are you current pump has seen its best days and there's no question the pressures in your fuel rail are going to be a lot higher than it's ever before confronted. Why risk leaning out the fuel?

ZimbutheMonkey
10-08-2010, 09:48 PM
Inlines always give me the willies. Problem is if you're relying on it to supplement pressure and it fails, you've still got enough fuel pressure from the primary pump to keep the engine running in a lean state. In other words it can be just enough rope to hang yourself with. There was a BT S4 guy that had that happen. Blew the inline pump, had enough pressure from the primary to keep running at full boost and fragged his engine when he leaned out.

As long as the primary pump can supply enough pressure on it's own then you're OK in the event of a failure. However I'd just be careful on that.