996 TT question

[sek]

Have there been any important mechanical changes since the 996 TT came out (in 2000 I beleive). As far as I can tell, it seems that the answer is no, but I'd be interested to hear if that's wrong. Also, has the TT tip been a five speeder from day one?

Thanks

[t urbo]

Late 2003 models had the tolerances changed in the front diff, apparently for the better but many of them now make a rattle noise at 1000-1800rpm in gears 5 and 6. They say that the noise is normal and fades with miles but mine hasnt. What OPC mean is 'don't worry you will get used to it in a year or so'!

>> Edited by t urbo on Saturday 16th July 11:22

[robbom3]

There's the X50 upgrade. Don't think I'd class it as a mechanical change, it's actually an option. I don't think this was available on the early cars.

[Roshambo]

Minor changes from its launch in 2000 until now.

A glovebox, rain sensitive wipers & auto dipping mirror were made standard in 2002 I believe.

I also believe that the software on the ECU was upgraded. I remember being told by a few tuners that the later cars are slightly smoother & that they use a different version of their tuning software depending on the year of the car, but nothing I guess that really matters or was advertised.

Ro.

[roshambo]

1000-1800rpm in 5th & 6th !!
My TT really doesn't like that gear at those revs !

Ro.

[t urbo]

roshambo,
All 996 tt's should be fine with pulling from as low as 800 rpm, yes thats right 800 rpm all the way to the redline.

[Carrera2]

Silly question (new to Porsches) but why's it called a TT - is it because of the twin turbo? Surely it's a bi-turbo though....?

[silver993tt]

In Germany it's referred to as a bi-turbo, in the US it's referred to as a twin turbo.

[Carrera2]

silver993tt said:

In Germany it's referred to as a bi-turbo, in the US it's referred to as a twin turbo.

I see - any ideas why we've adopted the yank variation?

In my mind a twin turbo has the two turbos in series, with one larger than the other to reduce lag, while a bi-turbo is literally just two identical turbos (one for each bank of the engine).

[roshambo]

Mine will do it, but it doesn't half complain while its doing it, a trait of turbocharged engines I thought.
I have had a couple of V6 engined cars & they happily pull from less than 1k revs in 6th without complaint, but my TT dont like it much.

Ro.

[ColinC2]

Carrera2 said:

I see - any ideas why we've adopted the yank variation? In my mind a twin turbo has the two turbos in series, with one larger than the other to reduce lag, while a bi-turbo is literally just two identical turbos (one for each bank of the engine).

However correct it might be not quite the same is it ... a 996 BT ? :-) How reliable would that be?