On this page is a series of pics and ideas.
Had an idea, the downside to runnin a boatload of boost is that you need more gas. As in a LOT more gas. So I's wondrin if it would be possible to, instead of getting a better fuel pump, simply add another fuel pump that I found in the junkyard.
Assuming the electronics could handle the extra wattage, it might work to increase volume pumped, but not pressure. And any fuel injector must work against the boost pressures within the intake manifold to shove gas in there. Gary Donovan's Relentless's fuel injectors have to fight against 33psi of boost. So obviously stock fuel pressure (60psi - 33psi = 27psi = not enough pressure for the injectors) won't work and he uses some kind of adjustable fuel pressure regulator and I think a high pressure 255L/hr fuel pump to compensate.
But for sane amounts of boost simply doubling them up and adding more fuel injectors might work. The stock fuel system is only good to ~17psi, which makes the 2.5L burn about the same amount of gas as a chevy 350ci V8. I hope it wouldn't need a bigger fuel line to the engine bay.
This guy is amazing.