TDI Engine Conversion for VW T3: Info & Docs

Hi.

After my colleague gave me a hard time about the JX, I now have to help with, or actually do, the TDI conversion.
It will likely be a 1Z engine, and the original gearbox (3H or similar) will remain (for now).


Can anyone provide me with information (links, documents) on this topic?

What about "registration"? Is there a standard inspection report available?

Thank you.
m;

pretty good forum.
http://www.t3-umbau.de/


and here's the guru himself:
http://www.syncro-bernd-jaeger.de/DEUTSCH/TDI-Umbau/tdi-umbau.html

After my colleague gave me a hard time about the JX, I now have to help with, or actually do, the TDI conversion.


Hehe, congratulations, you JX Killer. You shouldn't step on that little engine, otherwise it will retaliate .

Here are two links for a brief overview.

Renovation1
Renovation2
The more you do yourself, the cheaper it will be. Parts from commercial suppliers are expensive.
Your colleague won't be happy with the 3H transmission. In general, the original transmissions are a weak point. The 1Z is still okay with its 200 Nm of torque.
Regarding registration, I would simply suggest visiting the TÜV (technical inspection authority). There are many similar modifications.


Regards,

Maciek.

Hi,

"The transmission should probably still work for now, as long as it hasn't already been damaged. The bus will just be slower because the TDI engine doesn't rev as high as the JX engine. I also drove my AFN with the JX transmission for a year; it's almost like an automatic, always in the highest gear."
If you need any circuit diagrams, please let me know.

Greetings,
dieter

Thank you, Dieter.

but circuit diagrams will be the least of my worries, since I already have a 1Z and have been wiring it extensively .

I see the problems more in the (self-made) mechanics.

- Motor mounts (double hydraulic, like those from Bernd Jaeger, or rubber mounts, like those from Notter).
- complete exhaust system

What exactly is the JX doing at 4000 RPM? Currently, it has 215/65(?) R15 tires on it.
(Unfortunately, the bus does not have a tachometer .

m;

Thank you, Dieter.

but circuit diagrams will be the least of my worries, since I already have a 1Z and have been wiring it extensively .

I see the problems more in the (self-made) mechanics.

- Motor mounts (double hydraulic, like those from Bernd Jaeger, or rubber mounts, like those from Notter).
- complete exhaust system

What exactly is the JX doing at 4000 RPM? Currently, it has 215/65(?) R15 tires on it.
(Unfortunately, the bus does not have a tachometer .

m;

I know a group that mostly converts T3 vans. TDI engines or even 4.2 V8 Audi engines are common among them. If you're interested, feel free to contact me; I might be able to provide you with a phone number or some information.

Hello.
I also plan to build a 1Z engine into the T3.
However, it is also supposed to receive larger nozzles and a chip.
The original clutch and transmission are no longer sufficient.
Which gearboxes can handle what?

Marzocchi wrote:

I also plan to build a 1Z into the T3. However, it is also supposed to receive larger nozzles and a chip. The original clutch and transmission are no longer sufficient. Which transmissions can handle what, otherwise?

Hi,
The original T3 gearbox starts to fail beyond an input torque of 200 Nm, so it's "no way" to use it with powerful diesel engines. Furthermore, the torsional vibrations of the TDI engine damage various components in the T3 gearbox, which is why more powerful gasoline engines or indirect injection diesel engines are less problematic.
Due to the rear-mounted engine, only a very limited number of aftermarket transmissions are compatible. The Porsche G50 is the classic choice, but it is rare and expensive. Furthermore, the G50 is not particularly well-suited for TDI engines.
Another possibility is the Renault UN1, because this transmission allows you to rotate the differential, which in turn changes the direction of rotation.
The Audi Tiptronic transmission can also work in reverse if a special gear set for reversing the direction of rotation is installed.
Some contemporaries simply install gearboxes for front-engine vehicles upside down . Well, you really have to be quite pain-free to do that...

"Gearboxes from passenger cars are usually geared too long, as a T3 is essentially a very heavy, boxy vehicle with enormous rolling resistance!"

Regards,
Jens.

BTW:

My personal TDI installation attempt has been temporarily suspended.
The T3 that is currently disassembled will once again have a JX installed (or we will repair the JX).
I was able to convince the owner of the enormous expenses and costs involved.

I'll leave the thread up anyway, so it can serve as a small collection of URLs or tips.

Thank you for the tips.
m;

Gearboxes from passenger cars are usually too long in their gear ratios, because a T3 is, after all, a very heavy, boxy vehicle with enormous rolling resistance!
'

Even a T3 can achieve over 200 km/h with an aftermarket engine and transmission. You can take both of these components from a donor car and install them. For example, models like the A4, A6, and Passat, or similar vehicles. } Knowing how to do it saves time, money, and energy. Such a conversion can be made feasible even with a small budget.