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what size fuel injectors should i use if i am planning on having about 16psi, and about 540rwhp at the most?? should i use 42s? give me your opinions, i have a 03cobra pump also. you can read my sig. on what is done to my motor to answer my question. thanks
 

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According to my calculations, HP(at crank) x BSFC/8 x duty cycle. You should need 40.3lb injectors, so 42's should be fine at minimum. I would recommend 50's though.
hope that helps

Dave
 
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