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Averying · 06-20-2023, 10:29 AM

Question to those who have either Stillen or GTM supercharger kits: what power/boost levels did you max out the provided 255lph fuel pump?

Im making ~9.5psi of boost from my GTM Stage 1 kit and im running lean under hard pulls. The tune needs to add more fuel, increasing linearly up to a max of 20% extra fuel needed near redline. Symptoms of losing fuel pressure according to Eugene. I installed a fuel pump relay kit which didn’t help the issue. 340lph pump already on order.

I’m probably only making 450whp or so, which seems low to max out a 255lph pump. Anyone else need to go to a 340lph at this power level?

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06-20-2023, 10:29 AM	#1 (permalink)
Averying Enthusiast Member Join Date: May 2018 Location: Rhode Island Posts: 478 Drives: '09 370Z, '03 G35 Rep Power: 14419	Maxing out 255lph fuel pump Question to those who have either Stillen or GTM supercharger kits: what power/boost levels did you max out the provided 255lph fuel pump? Im making ~9.5psi of boost from my GTM Stage 1 kit and im running lean under hard pulls. The tune needs to add more fuel, increasing linearly up to a max of 20% extra fuel needed near redline. Symptoms of losing fuel pressure according to Eugene. I installed a fuel pump relay kit which didn’t help the issue. 340lph pump already on order. I’m probably only making 450whp or so, which seems low to max out a 255lph pump. Anyone else need to go to a 340lph at this power level? 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