[jpnovak]

for ITB mode it takes a lot of work. You will not find a tune file that works. You have to setup specifically for your engine.

You must tune the engine with speed density and working TPS. Then workout the proper TPS% at each cross-over point using datalogs. Then setup both switchpoint curves using the data.

If you don't understand how it works you will not be able to tune it correctly.

Honestly, Just like Mark says the 964 cams have a wide enough lobe center that you will have a strong vacuum signal. IMO you will get better results using SD mode. The vacuum signal will respond faster than TPS anyway due to the low volume of the intake tract under the throttle plate.

large throttle bodies can be easy to tune except for the transitions where large swept area combined with fast throttle movement will dump a lot of air into the intake and it can be challenging to get tip-in and acceleration enrichment correct.