@NewZed if one were to avoid using a surge tank in the engine bay, I agree. You would have to solve your slosh/starvation issues at the tank. Even a momentary vapor bubble pulled into your fuel line will cause a problem with EFI, if the ~40psi doesn’t cause it to collapse. SU’s, you would be OK to a point, since the fuel dumps into an atmospheric reservoir anyways (float chamber). I am a big fan of the quart surge tank though. S30 has a ton of space up front to choose from, but it would be a struggle to fit Z31+. That’s a heck of a lot of fuel to run-through, and the shape means you will use it all before you pull Vapor into your EFI pump. To be specific, this is my experience with the L28et street Z I have (@16psi).
Have not raced yet… I’m just an Engineer that comes-off as a know-it-all, and humbly accept criticism as a result. I don’t mean to be condescending, but I recognize i can be.
John and Ben are real racers though
cars almost running! Should be hitting the track by Feb (thanks to my California mortgage payment).
good luck to the OP!
PS: same problem to consider with oil starvation, but it would take significantly more lateral G’s than what it takes to suck Vapor in your tank when <1/3 tank.