WANTED: Bosio race 683 nozzles to fit v6 tdi engines

quattrosun

Member
Joined
Oct 20, 2024
Location
Scotland
TDI
1.9 AFN; 2.5V6 AKN
Great to see Diffas and Adammss24 still active here!

I have read almost everything on the forums from around 2010 era and appreciate I am very late to the scene. I have just pulled the engine on my 2001 AKN (Blew VP44 pump) and have sourced a new (170k) AKN engine with good pump.

I would like to upgrade turbo and injectors while it is out and seeking up to date advice.

I would like to source GT2052s turbo from BAU engine. The injectors i am less certain but hoping someone here can supply or point me in the right direction.

I am running a Van Aken tuning box and SS exhaust from DP. I estimate around 175Bhp. This car has been my daily for past two years but I will admit I took it on track just before the fuel pump blew.

Any advice on fitting or sourcing the following:
BOSIO 683
bosch dsla142p1519
Or other options.

Cheers,
Sunny
 

diffas

Veteran Member
Joined
Jun 25, 2008
Location
Finland
TDI
B5q A4 Avant 2.5TDi+, B7q A4 Avant 3.0TDi
Ah sure. sometimes we old school guys still write on forums :D
Wish you have waited litle longer and sourced new gen engine instead ( bdg, bdh, bau...)
You wont get any upgrade on BAU turbo since it is same as akn turbo, just newer and some minor upgrades that are not power related. If you wish to push stock turbo to the limit like 210-220hp range you can get away with it. Upgrading small nozzles from cummins dsla143p970 are proven good upgrade. Also you need tune and at least 3bar map.
 

diffas

Veteran Member
Joined
Jun 25, 2008
Location
Finland
TDI
B5q A4 Avant 2.5TDi+, B7q A4 Avant 3.0TDi
And what I have done since last post is that find out limits of the stock flywheel. Turned car down bit after the dyno, but later on the summer it was turned up but since we are almost 800nm range stock flywheel breaks down. First one took 13launches and second NEW luk took 10launches. :D
So yeah on dragracing and "violent" gear changing they dont like it that much. I really hope that i can get new billett dmf soon so i can test new pump and try to go 400kw range.







 
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diffas

Veteran Member
Joined
Jun 25, 2008
Location
Finland
TDI
B5q A4 Avant 2.5TDi+, B7q A4 Avant 3.0TDi
Yeah, Friction plate almost like knife cut off from the rivets :D
 

quattrosun

Member
Joined
Oct 20, 2024
Location
Scotland
TDI
1.9 AFN; 2.5V6 AKN
Thanks for the info. This is my first engine swap - I appreciate I could benefit from newer gen but I have sourced the complete engine from a friend very cheap.

If i have the same turbo as BGD, am I mistaken thinking the injectors are the same on AFB and AKN? This is the only thing I am uncertain of. I would like to push limits of stock turbo as this will allow me to get on the road sooner.

I can not find confirmation if the AKN engine shares the same injector body as AFB. I have been offered some Bosio Power Plus nozzles, will these definitely fit in my injectors?

Also, I am in the north of Scotland - difficult to find someone who can work on these cars, can anyone (im looking at you diffas...) tune my ECU to take these nozzles and push 3 bar boost?

Great to see you are still working on these cars! That engine must be putting out some serious torque!
 

diffas

Veteran Member
Joined
Jun 25, 2008
Location
Finland
TDI
B5q A4 Avant 2.5TDi+, B7q A4 Avant 3.0TDi
AKN and AFB have different type of injectors, therefore different type of body and nozzle. AFB has its own type, all others are basically the same, only small variations are in opening pressures. To option would be 970nozzle since tens and tens cars are well working with those. I dont do ecu tunes that much myself...well something experimental to my own car but otherwise they are outsourced. :D
 

quattrosun

Member
Joined
Oct 20, 2024
Location
Scotland
TDI
1.9 AFN; 2.5V6 AKN
Thank you Diffas, I went through a lot of forums posts to get this confirmed. Much appreciated. 😎

I think I will take your advice going forward 👍

Cheers
 

quattrosun

Member
Joined
Oct 20, 2024
Location
Scotland
TDI
1.9 AFN; 2.5V6 AKN
Ah sure. sometimes we old school guys still write on forums :D
Wish you have waited litle longer and sourced new gen engine instead ( bdg, bdh, bau...)
You wont get any upgrade on BAU turbo since it is same as akn turbo, just newer and some minor upgrades that are not power related. If you wish to push stock turbo to the limit like 210-220hp range you can get away with it. Upgrading small nozzles from cummins dsla143p970 are proven good upgrade. Also you need tune and at least 3bar map.

I have just had a 2001 A4 B6 pop up locally with water damaged ECU. It is relatively low mileage (117k) and is a 180bhp later gen engine. Can you give me an idea of what would be involved to put this engine into the B5? I assume I would need ECU but unsure about coding of clocks or fuel pump. I know this is now slightly off topic, but I would still be looking at injetctor/turbo upgrade etc... Maybe I should start a new thread?
 

diffas

Veteran Member
Joined
Jun 25, 2008
Location
Finland
TDI
B5q A4 Avant 2.5TDi+, B7q A4 Avant 3.0TDi
Engine drops right in to b5, no problem there. Ecu swap is not needed. Take the pump from the AKN and swap it.
You can use you current harness and swap out some of the connectors or take sensors from the old engine. Newer engine has some different style connectors on sensors etc.
 

KadQuattro

New member
Joined
Mar 13, 2025
Location
Hungary
TDI
A4B6 2.5 V6 Tdi BDH quattro Avant manual
Hello 2.5 V6 Fellas!
I am trying to build a reliable daily car with more than the stock power. All I have now a BDH engine, a hybrid turbo and an iveco nozzle set with size 8x0.16 (probably in AFB housing).
My current setup was mapped today. I am impressed of the performance I get over 2200 rpm but I need more below 2000rpm too. Also I am looking for a set of quality nozzles maybe a set of Bosio race 683 if any of you still has on stock. Also is there any turbo what was working good for you on daily use? I am really open for your experiences.
 

diffas

Veteran Member
Joined
Jun 25, 2008
Location
Finland
TDI
B5q A4 Avant 2.5TDi+, B7q A4 Avant 3.0TDi
Well you get better spool perfromance with gtb2260vz (3.0tdi gen2) than hybrid but its limited to 300hp range anyway. Race nozzles are discontinued. Recambo has +100% nozzles available.
 

Knightboat

Member
Joined
Oct 6, 2020
Location
Wien
TDI
2.5 V6 AKE
If you have the 8 hole cummins nozzles, you must have AKE, BAU injectors. For the Bosio you need AFB injectors, part number ending on 201 E.
I still have a set of Bosio 683 nozzles left.
 

KadQuattro

New member
Joined
Mar 13, 2025
Location
Hungary
TDI
A4B6 2.5 V6 Tdi BDH quattro Avant manual
Well you get better spool performance with gtb2260vz (3.0tdi gen2) than hybrid but its limited to 300hp range anyway. Race nozzles are discontinued. Recambo has +100% nozzles available.
you are not the first saying that gtb2260 is a good choice for our 2.5tdi. I have two concerns on that.
- I need a daily use car, with nice smooth performance delivery from 1500rpm to the end. The big turbos always create dead low rpms. I am not sure how the gtd2260 would make in low rpm's. I see you have huge experience in top performances what is a great achievement and congrats to that! On the other end my top target for the performance is 250-280 hp that would make it for me but I also need the low range too. Any idea on this power requirement what I need?
- to make the gtd2260 fit the 2.5 is it a big modification? I am not familiar with the compressor and the hot side connections it is challenging to make it fit?
 

KadQuattro

New member
Joined
Mar 13, 2025
Location
Hungary
TDI
A4B6 2.5 V6 Tdi BDH quattro Avant manual
If you have the 8 hole cummins nozzles, you must have AKE, BAU injectors. For the Bosio you need AFB injectors, part number ending on 201 E.
I still have a set of Bosio 683 nozzles left.
Is that Bosio spray angle identical to the original nozzles? What is the size of that nozzle?
Now I have 8x0.16 Iveco nozzles in AFB housing (at least that is what I have been told by the guy who made it).
 

diffas

Veteran Member
Joined
Jun 25, 2008
Location
Finland
TDI
B5q A4 Avant 2.5TDi+, B7q A4 Avant 3.0TDi
you are not the first saying that gtb2260 is a good choice for our 2.5tdi. I have two concerns on that.
- I need a daily use car, with nice smooth performance delivery from 1500rpm to the end. The big turbos always create dead low rpms. I am not sure how the gtd2260 would make in low rpm's. I see you have huge experience in top performances what is a great achievement and congrats to that! On the other end my top target for the performance is 250-280 hp that would make it for me but I also need the low range too. Any idea on this power requirement what I need?
- to make the gtd2260 fit the 2.5 is it a big modification? I am not familiar with the compressor and the hot side connections it is challenging to make it fit?
Gtb2260vz is spooling almost idendical to the stock turbo with bigger nozzles and delivers good power on 300hp range. Actually needed to reduce spooling because dmf vibration on under 2000rpm. Its newer tech than gtb2260vk from 1gen 3.0tdi. Sure newest gtd2060vz should spool even better. You need new exhaust manifolds for those. If you find 3.0tdi y-pipes you can modify those to fit.

Found dynosheet with gtb2260vz with race nozzles.
 
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