Its actually a pretty typical over-all fuel tank shape found in many cars. The lack of baffles combined with the non-existent displacement of the fuel pump module surge canister, and the lethargic recovery of fuel via a return venturi is why the 370z suffers starvation worse than other vehicles.
I have posted several times recommending people to attempt putting some fuel cell foam in the center of the tank. Not sure why nobody wants to try it! It wont work as well as my road race pump, but it may or may not offer considerable improvement.
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