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I take it you don't know how to calculate it. In that case, listen to these guys. Just an FYI, a 500 hp car needs an estimated 211 lph. You're not making 500 hp and you won't come anywhere close without adding a little math into the equation.
EDIT: But bigger must be better right?=Not always/usually isn't true.
heres a flow chart
211lph is about 55 gallons so it looks like the standard would be ok, because i wouldnt need that much your right, and the fuel pressure is still above stock