The 944 turbos and 968's have a quasi baffle around the pickup but they will do the same thing you are experiencing with the Z.
For my 944 turbo GT3S car I put in a surge tank. Get a 3.5 to 4" ID aluminum pipe and cut to length for your installation. A 3.5" x 12" tank will store about 0.5 gallons. TIG a plate on the top and bottom and add the connector bungs. I did the following: a line from the fuel tank to the surge tank top, a line out of the surge tank bottom to the fuel rail, a line out of the fuel rail to the pressure regulator, a line from the pressure regulator back into the surge tank top and then a return line from the surge tank top back to the fuel tank. I used braided stainless lines and AN fittings. It really isn't too hard to do.
I'll see if I can get a couple of photos of a friends car who has the same setup and post them.
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16 Cayman GT4, Carmine Red, Buckets, PCCB etc.
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