1990ruf

Is this thred still alive?

chicabum

Lots of confusion about the X50 for the 993T. Some because it was also available for the 996.
424HP is the same as the turbo S, just 16 HP more than standard turbo. I always thought 16HP
was a silly upgrade.
The 16HP (Less than 4% increase in Power) are easily achievable with overboost and I don’t think it really needs the extra radiator.
I had the impression X50 was always, at 450, more powerful than TurboS. Didn’t know about the x50 424HP.
I always liked the regular turbo wing better…
About availability for different years, you need to remember that the ECUs were different from 97 on, so if parameters needed to be adjusted, on a 97 and later that would be a few minutes job and depending on what needed to be adjusted for 96 or 95, it could need some hardware replacement on the ecu.
Even the first gt2 had around these HP figures.
These different figures went all around because is was “so easy” to extract more power of that engine, and because the engine could take it so well.

I don’t know if you could order it new or had to add it later and I don’t think the factory would open back doors…
As far as I know there were different version of the 993T for US, ROW and Brazil. I have the Vin numbers somewhere.
Additionally there were different equipments for 27 different countries.
The Story of the army guy in Germany … I heard a thousand variations of that same story to explain discrepancies in Porsches. Forget it.

1990ruf

I own a 1997 X50. (450) HP.

chicabum

1990ruf,
Anyway you think about it, 450 is the ultimate iteration of air cooled Porches.

for the X50, did you have K16 or K24?

lambotex

my 96 also had the 450hp X50 kit. It is K24 turbos, extra oil cooler and different ECU. This was sold as a dealer install option.

kcphuah

I have a ROW 1997 with factory X50 installed, extra oil cooler and etc but how do you tell if the X50 option has 450hp or 424hp?

DiegoR

AFAIK is:

408cv
430cv
450cv

You can check the turbos and and the DME P/N to see if they are the bigger turbos and correct DME for 450cv option. If so (450cv) most likely was upgraded at some point.

Maybe if you run the VIN for options, then it can tell you if your car was equipped with the X50 (430cv) power package or not. Although, not sure if the X50 came with the extra oil cooler or this was a separate option...at least in mine the X50 and the extra oil cooler are different option codes listed in my VIN.

430CV = K16 turbos + reprogrammed DME

450CV = K24 turbos + reprogrammed DME (different than 430 CV DME)

1990ruf

I have one ill sell you. True x50. PM me.

Burzel55

Bringing up this old thread,
Does anyone know production numbers on RoW 1997 Turbo with X50 (430hp) package?

Thank yo for any information

JB 911

By the option sticker code. X50 has 430 PS. XLC has 450PS. Sorry the answer took a while

1996
286

1997
ROW 359
US 11

1998
48

C4Spolar

This is the 993tt XLC 450hp package minus the oil cooler only for 1998 993tt model. The ECU ending with P/N 85 is the 450hp power maker for 1998 only, ECU ending with P/N 83 is the 430hp for 1997, both works with K24 turbos.

Burzel55

Thanks for the quick reply. Can I ask where you found that information? Car is great and love learning more about it

JB 911

Absolutely. The book is Porsche 911 turbo AIR-COOLED YEARS by Gabriel-Franz. It's was a limited edition and sold out but they pop up on e-bay every once in a while - that's where I found mine.