Just finished my first endurance race in a 1g DSM!

[asshanson]

That's awesome guys. Let me know next time you run at MAM, if I don't have plans I'd definitely like to come see some racing (only 2 hrs from me).

And BTW that fuel setup looks so terrible...... lol
Of course I'm kidding, but I'm curious about a couple things. Just at the output of the lower/final pump, there is a secondary line to the FPR. Is that a "T" there? It looks like it but I see no fitting. But if so, I like how it's diverted back to a vertical surge tank so the slosh doesn't affect it on corners, a very good setup.

Last question which I've always wondered, does significant back pressure on a pump hurt its life? In your setup you have 2 pumps feeding the surge tank, but most of the time that's not really needed, so they are forced to provide much more than required volume. Consider below scenario:

Pump 3 at bottom is acting as feed for the fuel system. 99% of fuel from the regulator is passed back into the tank at idle.
At the same time, pumps 1 and 2 (top) are trying as hard as they can to push new fuel to the surge tank.

So you get all 3 pumps trying to put fuel pressure into the surge tank. I've never understood how this doesn't cause pumps to fail. Maybe in real work scenarios it works, and maybe I'm missing a key physics element.

EDIT: or maybe the surge tank is at like 150+psi, but I would assume the FPR would be affected at that point, delivering higher than desired pressure alwyas.