My Q4

[Evodelta]

Disregard my comment about driving without the propshaft, that could hurt the central diff I think...

I'll have to read more carefully next time, sorry.

1st - sorry for my english

Inside the diff it's the torsen part that brakes - the small helical gears in it. they are like cut in the middle with a knife. I will try to make some pics of the broken parts.

Don't worry about your English, for sure it's better then my Bulgarian.

I wanted to know if your diff was like an integrales, I doubt it is as they are pretty bombproof.
How are you breaking it? Are you launching the car suddenly like in a drag race? This is what breaks transmissions, not outright power at these levels.

[j1v]

I launch carefully. Especially with the second diff, I was very careful, actually it almost haven't been launched at all. There where however vibrations form the rear of the car with it.
We were not able to open it prior to putting it on the car, because of the "warranty" they gave me. It was sealed and I had a couple of days money back warranty if it was not in good condition. We only changed the oil in it and put it on the car. I will for sure not want a warranty diff next time

[j1v]

I just bought a dedra rear diff. It is an open diff with el. blocking via a solenoid. The housing is almost the same, and it fits without any modifications.
I drove it for a test, and its OK. Haven't tried it on a track or launch however.
Later I will probably try to connect the blocking device somehow (it works needs vacuum and some kind of control of the solenoid)

If someone has more info on it, please let me know.

Meanwhile, I sound dampened the hole car, replaced everything on the brake system and installed new seats. I have to say it became a different car. Will post pics later. Time for bigger injectors, 3 bar MAP and some serious tuning finally ....

[j1v]

[Steve Webb]

I'm assuming its not finished yet, and are you going to be fitting an external wastegate? That first pic looks like you have closed off the one in the turbo itself.

[j1v]

I'm assuming its not finished yet, and are you going to be fitting an external wastegate? That first pic looks like you have closed off the one in the turbo itself.

absolutely right

[j1v]