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Averying · 07-19-2023, 01:18 PM

FYI this wasn’t a fuel pump problem, which makes sense because I suspect a 255LPH should make a bit more power than my car is currently.

The issue is fighting fuel pressure drop on a returnless system. Between the lack of a boost-reference fuel pressure regulator, and the pressure drop in the stock fuel lines, fuel pressure is likely high 30s PSI when it should be 52 PSI.

ECUTEK can compensate for this with longer injector duty cycles to increase fuel flow, but only an additional 20%.

My next plans are to swap to 8AN fuel supply line and at some point a boost reference FPR.

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07-19-2023, 01:18 PM	#4 (permalink)
Averying Enthusiast Member Join Date: May 2018 Location: Rhode Island Posts: 478 Drives: '09 370Z, '03 G35 Rep Power: 14419	FYI this wasn’t a fuel pump problem, which makes sense because I suspect a 255LPH should make a bit more power than my car is currently. The issue is fighting fuel pressure drop on a returnless system. Between the lack of a boost-reference fuel pressure regulator, and the pressure drop in the stock fuel lines, fuel pressure is likely high 30s PSI when it should be 52 PSI. ECUTEK can compensate for this with longer injector duty cycles to increase fuel flow, but only an additional 20%. My next plans are to swap to 8AN fuel supply line and at some point a boost reference FPR. Sent from my iPhone using Tapatalk __________________ 2009 Sport Touring \| Platinum Graphite \| GTM Stage 1 Supercharger \| BC BR Coilovers \| Hotchkis Swaybar \| Z1 FUCAs \| AME TM-02 Wheels \| Z1 2-piece Front Rotors \| Z1 Clutch & Flywheel \| Invidia Gemini Catback \| GTM Resonated Test Pipes