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Yes, DI and Port get the fuel from the same source. I guess you could say it's divided up into two portions, the PI gets about 30% as it comes thru the fuel rails and the DI gets it right after the FF sensor when it enters the HPFP. I guess you could say the DI doesn't have to work as hard as the PI takes up some of the burden on the DI. It's a miracle. Right? Best thing since Pepper Jack Cheese.
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