I am helping out on a build-up of a greddy turbo rx-8 that is in need of fuel. Who knows the necessary parts for a complete fuel upgrade? Which pump is available? What injectors, upgrade all or just secondary?

 

I think P2's? 490cc are drop in upgrades.... Ask mad-dog, i think he did 490cc to the P2 and secondaries and the 380's to the P1.... not too sure

 

I got my 720cc injectors from Scott over at Mazport.

 

We need more information.
What EMS are you running? (this has direct bearing on fueling strategies)
How much fuel are you in need of? Have you done this calculation?

I have 490cc P1s, 380cc P2 and 380cc S injectors. I have enough capacity for the boost I'm running with plenty to spare on the stock fuel pump - although I'm considering running another in parallel just for reliability. Might save me another engine...

 

Running the interceptor from Scott, greddy turbo pretty much losing fuel in top rpm . Scott said it's the fuel pump not suppling enough fuel for the power the car has (290 whp @ 12psi). So, we were thinking of just fully upgrading the fuel system so that any bigger turbo upgrade will already have enough fuel supply no matter what.

 

I ran about 80% duty cycle at 9psi with the stock setup...This was too much for the injectors and pump, and I ended up leaning out and pinging.

It's a good idea to have a more headroom than 20%