One thing I didn't see mentioned was;
I returned my fuel back into the fuel fill tube. It unbolted from the tank, I welded a steel AN fitting and returned it back into the top of the stock tank.
Just like filling it up at the gas station. One thing for sure, you don't want to pickup fuel from one of those weld in sumps and return on the other side. We have had a ton of problems drag racing with the sump set up wrong this way getting air bubbles sucked into the fuel pump.
Now the supply, you need a better sump. On my stock 66 Nova wagon, I used the stock line to feed the engine and you can hear the pump pickup uncover when it gets below 1/4 tank and a hard corner but it still drives just fine. It's not a race car just a stock 283.
I personally saw a 572 GM crate engine on the Dyno at Fast that made 600hp give or take. They ran 60psi fuel pressure and it was correcting the fuel 30% at then end of the run. I am sure the next run it wouldn't have been so bad. They recommend the aeromotive pump upgrade above the 500hp. That is about all one of the walboro pumps are good for. No one here has talked about the Magnafuel pumps, they are about the best for electric pumps I believe.
As for Fast copying this, don't think so, this is just a dumbed down version of what they already have had for years. An EFI system that uses closed loop fuel to correct the VE table. Nothing new here. 4 Injectors in one throttle body? New? Accel has also had that for years too. Retrotek is new on the EFI scene, if anyone copied anyone it's them.
I know the Fast software engineer Lance has been working on this for at least 2 yrs, Fast contracted someone else to do the EZ EFI but weren't happy with what they got so Lance took what they had and rebuilt the software to work.
Now they are back to work improving the XFI software with new features.
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