1. Stock GTR saddleback fuel tank. Inspect/repair trouble spots, possibly line with a bladder if required by local associations' rules.
2. Dual 255LPH Walbro fuel pumps on either side of the hump in the fuel tank (1), each with 30 micron filters, each with their own 12V 20A relays, each with a -6AN line to the surge tank (4).
3. Dual -6AN SS braided fuel lines from the in-tank pumps to the surge tank
4. Tall, cylindrical surge tank keeps a steady supply of fuel at the bottom during braking, cornering, and acceleration. The idea is that the engine is sucking up so much fuel, that a significant amount of body roll would limit or starve the fuel pumps (2) of fuel momentarily, but enough to lean out the mixture in the engine and possibly burn valves/pistons. A surge tank keeps a steady pool of fuel available.
5. High pressure -10AN SS braided hoses will carry fuel to the in-line fuel pump (6), from (6) to the in-line fuel filter (7), and from (7) to the fuel rail (8).
6. The in-line pump must be able to supply the total amount of fuel needed by the injectors (9) at the appropriate pressure. For this build, the combined pressure of the dual Walbro pumps (2) will keep the surge tank (4) full in nearly all situations and help the in-line fuel pump (6) run more efficiently. I chose the SX Performance 80203 pump for its comparable performance to the Bosche 044 in-line pump and for its larger -10AN input/output connectors. It'll have its own 12V, 25A relay.
7. 60 micron in-line fuel filter is meant to withstand the high pressure fuel, an extra line of protection to prevent the injectors (9) from getting clogged and running a lean mixture, potentially leading to serious engine damage.
8. -10AN fuel rail, big enough to accomodate the high pressure and enough internal space to ensure all four injectors (9) get enough fuel.
9. 4 x 1600CC low-Z injectors are good for ~850HP at 85% duty cycle.
10. Adjustable fuel pressure regulator is located after the injectors (9) to ensure that all injectors (9) receive enough fuel. If you put the FPR before the injectors, it can lag behind the changing manifold pressure and cause the injectors to undersupply fuel to the engine, causing a lean situation and potential serious engine damage.
11. -10AN fuel lines, large enough to carry the high pressure fuel back to the surge tank (4) during low engine stress situations (idling, highway cruising, etc)
12. A check valve is used in case the pressure inside the surge tank (4) is higher than the pressure of the fuel in the return line (11). A second check valve is used to prevent unfiltered fuel from leaving the gas tank (1) and entering the surge tank (4).
13. See (4). Fuel is returned to the top of the surge tank (4), where fuel supply is most important.
14. High pressure -10AN braided SS hose relieves any unnecessary fuel & pressure from the surge tank (4)