I've not yet found an optimal solution yet. I run hydramat, and literally fill up my tank to the brim before each outing.

How have you achieved this? I installed the flap which improved starvation on th Amaroo circuit with 2 consecutive left handers, but on the Sydney Motorsport Park I starve halfway down the straight after the 2 long left handers that lead onto the straight. It's like having a rev limiter at 6000rpm in 5th.

Now looking at what to do next.... Ideas?

I've a new 2022 BRZ and am wondering if in 2020 or 2022 they have addressed the fuel starvation issues or is still the same problem/same fuel pickup design?

I've had to run the tank full in my STI. I had some foam in the tank at one point, that helped. Then some of it disintegrated and made a big mess.
I've thought of getting the Hydramat.
It seems only one person mentioned it and it was not a solution? I'm surprised.

If I must do a surge tank it sure as hell won't be in the engine compartment and I'll put in a fireproof bulkhead. First, I'll think hard about a manually actuated transfer pump for the right side.