In tank fuel regulator bypass

Hodge · 07-30-2024, 08:00 PM

Hey everyone.

I am currently putting together a fuel return kit. The sticking point is the OEM fuel pressure regulator. What are you guys using to bypass this. I have seen Z1 and CJM do kits but im interested to know if anyone has completed a DIY delete without pricey delete kits.

Averying · 07-30-2024, 08:50 PM

Interested if anyone has a solution. CJM has a return fuel pump kit for ~$150 that has the basics but it’s more components than just the regulator delete.

Sent from my iPhone using Tapatalk

Hodge · 07-31-2024, 05:13 AM

I can put together the rest of the kit no problem at all. It’s the regulator delete piece I’m stuck with. There’s nothing technical to it, it’s free flowing but the issue is it needs to be the correct size to fit in the location where the OEM regulator sat. I’m guessing with it being a return it won’t be under any kind of load.

phunk · 08-04-2024, 04:39 PM

Just FYI the return line in a 370z is pressurized, as high or nearly as high as the feed line at some moments.

Hodge · 08-05-2024, 09:03 AM

Quote:

Originally Posted by phunk

Just FYI the return line in a 370z is pressurized, as high or nearly as high as the feed line at some moments.

Will this change when using it as a return or is it pressurized due to the Venturi system?

phunk · 08-05-2024, 09:29 AM

Quote:

Originally Posted by Hodge

Will this change when using it as a return or is it pressurized due to the Venturi system?

Yes it is pressurized due to the venturi system. So return or returnless doesnt change it, that only changes how long the plumbing between the regulator and the venturi is. The venturi system operates on a principle of pressure differential, so to relieve the backpressure would be to kill the venturis.

Hodge · 08-06-2024, 05:56 PM

Quote:

Originally Posted by phunk

Yes it is pressurized due to the venturi system. So return or returnless doesnt change it, that only changes how long the plumbing between the regulator and the venturi is. The venturi system operates on a principle of pressure differential, so to relieve the backpressure would be to kill the venturis.

That’s really good information to know, thank you buddy.

IsaacJ · 08-06-2024, 10:05 PM

Quote:

Originally Posted by Hodge

Hey everyone.

I am currently putting together a fuel return kit. The sticking point is the OEM fuel pressure regulator. What are you guys using to bypass this. I have seen Z1 and CJM do kits but im interested to know if anyone has completed a DIY delete without pricey delete kits.

I am actually in the process of trying to piece together my own system as well. Do you have a write up or breakdown of everything you are using?

07-30-2024, 08:00 PM	#1 (permalink)
Hodge Base Member Join Date: May 2022 Location: Northumberland Posts: 14 Drives: 2010 pearl white Rep Power: 3	In tank fuel regulator bypass Hey everyone. I am currently putting together a fuel return kit. The sticking point is the OEM fuel pressure regulator. What are you guys using to bypass this. I have seen Z1 and CJM do kits but im interested to know if anyone has completed a DIY delete without pricey delete kits.

07-30-2024, 08:50 PM	#2 (permalink)
Averying Enthusiast Member Join Date: May 2018 Location: Rhode Island Posts: 478 Drives: '09 370Z, '03 G35 Rep Power: 14419	Interested if anyone has a solution. CJM has a return fuel pump kit for ~$150 that has the basics but it’s more components than just the regulator delete. 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

08-04-2024, 04:39 PM	#4 (permalink)
phunk A True Z Fanatic Join Date: Mar 2009 Location: Chicago Posts: 3,668 Drives: 370 Rep Power: 974723	Just FYI the return line in a 370z is pressurized, as high or nearly as high as the feed line at some moments. Rusty likes this. __________________ Charles @ CJ Motorsports : Website \| Facebook \| Instagram \| YouTube Home of the 9 second, stock longblock, stock drivetrain 6MT 370z. 9.91 @ 142mph

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07-31-2024, 05:13 AM	#3 (permalink)
Hodge Base Member Join Date: May 2022 Location: Northumberland Posts: 14 Drives: 2010 pearl white Rep Power: 3	I can put together the rest of the kit no problem at all. It’s the regulator delete piece I’m stuck with. There’s nothing technical to it, it’s free flowing but the issue is it needs to be the correct size to fit in the location where the OEM regulator sat. I’m guessing with it being a return it won’t be under any kind of load.