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I am putting a powerdyne supercharger on a 94 5.0. I have #30 injectors for it and am not sure what ratio FMU disc. to get. I've seen guys sigs with 6-1 and 8-1. How do you know which I need? Does the type of supercharger like vortech/paxton/powerdyne have any effect on which one? Does the amount of boost mean anything? Cam/ Heads etc? I want to get it right the first time, so please advise me what to do. Thanks
 

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6:1 will be just fine with 40psi base fuel pressure.
 

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Whats your combo?
 
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