I am putting together a LQ9 build with a S475 turbo and I am looking to put down 700-750RWHP, but later down the road may upgrade the turbo/internals for more power. What is the max RWHP I could achieve maxing out my fuel system that has 127lb/hr injectors running 1 Magnafuel 4303 fuel pump on E85? I havent bought any of my fueling components yet so I just want to make sure I am safe.

 

Street car or drag car?. I would add a 450wally in the stock tank/fuel bucket.

The 450walbro should be enough fuel(e85)maybe add a boost a pump for your 700-750rwhp Then once that is achieved you could add a inline pump down the road.

 

Safe? Safe for what?

There are a million online calculators that will tell you how much power you can make on 127 lb injectors with E85.

 

Stay tuned for test results of series and parallel pump configurations. Pressure and flow curves.