AHU turbo upgrade

PassatLife

Well-known member
Joined
Jun 27, 2019
Location
Coquitlam, BC
TDI
1996 Passat Tdi Wagon
Does anyone know how the Kerma K03/K04 Hybrid compares to Xmans 1749 bolt on?


I'm running DLC 1019s, Malone stage 3, 2.5"turboback and it smokes enough to obscure the vision in my mirror lol

From what I understand it seems I either need to reduce fueling through the tune, (which Malone wants to charge me $100 for :rolleyes:) or flow more air with a bigger turbo.

I'm trying to avoid custom fabrication at the moment so these seem to be my only options.

*I've tried adjusting IQ to around 8ish but throttle response becomes so sluggish its almost undrivable.
 

burpod

teh stallionz!!1
Joined
Nov 27, 2004
Location
cape cod, ma
TDI
82 rabbit vnt ahu, 98 jetta vnt ahu, 05 parts car, 88 scirocco.. :/
The k03/04 is only mildly better than stock. Still teeny tiny exhaust... 2052 is good if you want to stick to a wastegate turbo
 

burpod

teh stallionz!!1
Joined
Nov 27, 2004
Location
cape cod, ma
TDI
82 rabbit vnt ahu, 98 jetta vnt ahu, 05 parts car, 88 scirocco.. :/
I misread your post - I do not know anything about the xman turbo (however, xman is awesome!) But it seems that turbo is in fact larger than the k03/04, which Is fairly pointless IMO unless you want a direct replacement that needs little to no tuning changes
 

Mongler98

Top Post Dawg
Joined
Mar 23, 2011
Location
Northern MD (HAGERBUSH)
TDI
98 Jetta TDI AHU 1.9L (944 TDI swap in progress)
K03/04 upgrade is for stock to mild applications 15 years ago
Go with a much better conversion to a 17 series vtn and convert it or go big and cheap with a 2052.
Literally anything is better than the 03/04 turbo. For the money go a bit bigger
 

Abacus

That helpful B4 guy
Joined
Nov 10, 2007
Location
Relocated from Maine to Dewey, AZ
TDI
Only the B4V left
K03/04 upgrade is for stock to mild applications 15 years ago.
Go with a much better conversion to a 17 series vtn and convert it or go big and cheap with a 2052.
You missed this.

PassatLife said:
I'm trying to avoid custom fabrication at the moment so these seem to be my only options.
15 years ago? It’s a 25 year old car and still relevant today.
 

PassatLife

Well-known member
Joined
Jun 27, 2019
Location
Coquitlam, BC
TDI
1996 Passat Tdi Wagon
Malone has agreed to give me a complimentary tune adjustment from stage 3 to stage 2 so I'll see if that helps. Otherwise probably going to pull the plug on the Xman unit, I've been eyeing it for a while now. Haven't seen any negative reviews on his other stuff so should be decent.
 

PassatLife

Well-known member
Joined
Jun 27, 2019
Location
Coquitlam, BC
TDI
1996 Passat Tdi Wagon
You missed this.

15 years ago? It’s a 25 year old car and still relevant today.
I think theres truth to both statements. For bolt on, the Kerma hybrid was the only option for AHUs for a looong time, until Xman showed up a few years ago. But I've also read multiple accounts that the Kerma unit is only a marginal improvement...

I do have a K24 from a 1.6TD laying around that I was contemplating on using but I'm concerned about the lag from going to such a large archaic turbo
 
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