TwinTurbo.NET: Nissan 300ZX forum - Delete the FPCU, it will fail with the Walbro 485/Hellcat.
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Subject Delete the FPCU, it will fail with the Walbro 485/Hellcat.
     
Posted by platinumist on May 24, 2021 at 11:57 AM
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In Reply To Potential issues running larger fuel pump? posted by Buckaroo Banzai on May 22, 2021 at 05:09 PM
     
Message Aftermarket regulator will be needed. I run a single 485 with the FPCU bypassed, Tomei FPR, fuel damper deleted, stock size lines (Gates barricade), stock fuel rail. Reliable 620 WHP, zero fueling issues. This is how Specialty Z told me to set up.

Stock fuel lines will work fine up to a point. A common issue with fuel return has to do with the fuel pressure check valve failing. I don't exactly know the symptom of the failure, but I removed mine from the hangar, advised by Scott at ZShack.

     
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