GTX 50 turbine map

Turbo spec thread is closed so made separate post. First time I see official turbine map of GT/GTX 50.

Now they also seems to have divided housing option.

That's wierd.....on the official website the 1.23 a/r black line you have, is labeled 1.39.

Those ARs are ones you would commonly run across on the precursor TV7X housings, but they would easily be machined to the UHP GT50 wheel. AFAIK TV7X housings are all open volute (agrees with the website).

Why they call it T18 flange ?

Havent checked Garrett website lately, didnt know those maps are there. Seems like that spanish site is BS.