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Well I am well into my tubo project and I have come across my final big obstacle. My fuel system is an OBD2 returnless fuel system with an in tank regulator. I will only be running 5 psi but I would like to build in some safety. If I convert to a return system I will need to fabricate many little parts and make everything work as it should. In theory this will make tuning easier but I am worried that it will create more trouble than it will solve. The OBD2 might freak out or the fuel pressure might be hard to get steady. Price really isnt the issue its the amount of trouble to be saved either way. Either way I will be running a Walbro 255lph pump. Let me know what you guys think.
on my 2000 v6 camry i have th in tank regualtor blocked off, i tapped the ends of the fuel rails and ran a return line back to the tank. I use a aeromotive regulator to adjust fuel pressure.
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1999 Solara v6 auto 13.0 @113mph s/c'd 9.5psi and nitrous
2000 Camry v6 5 speed 13.5 at 107.3mph s/c'd at 7psi
1997 Camry i4 auto to v6 auto swap! Built 3.3 3mz/1mz hybrid
on my 2000 v6 camry i have th in tank regualtor blocked off, i tapped the ends of the fuel rails and ran a return line back to the tank. I use a aeromotive regulator to adjust fuel pressure.
Did you simply crimp the end of the regulator output shut and now it just passes fuel straight thru? I want to do aeromotive fuel regulator 1:1 rising rate. Did this mod screw up the computer at all? What kind of line did you use for the return? Just braided stainless steel line?
Yeah the in tank regulator is removed and blocked off completely. I ran a -4 line back to the tank. The Ecu is fine , i actually lowered my base fuel pressure down to 35psi. I am running 400cc injectors on the stock v6 ecu using an S-AFC. I couldnt keep a good idle with the safc trimming 50%. LOwering the base pressure solved my problem. I also run a aeromotive 1:1 regulator.
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1999 Solara v6 auto 13.0 @113mph s/c'd 9.5psi and nitrous
2000 Camry v6 5 speed 13.5 at 107.3mph s/c'd at 7psi
1997 Camry i4 auto to v6 auto swap! Built 3.3 3mz/1mz hybrid
Yeah the in tank regulator is removed and blocked off completely. I ran a -4 line back to the tank. The Ecu is fine , i actually lowered my base fuel pressure down to 35psi. I am running 400cc injectors on the stock v6 ecu using an S-AFC. I couldnt keep a good idle with the safc trimming 50%. LOwering the base pressure solved my problem. I also run a aeromotive 1:1 regulator.
So I should just remove the stock reg completely and run a line from the walbro pump straight to the stock fuel line and then have a -4 line from the aeromotive regulator to the tank and did you just make a fitting next to the stock fuel line to dump the returned fuel back into the tank? seems rather simple...
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1999 Solara v6 auto 13.0 @113mph s/c'd 9.5psi and nitrous
2000 Camry v6 5 speed 13.5 at 107.3mph s/c'd at 7psi
1997 Camry i4 auto to v6 auto swap! Built 3.3 3mz/1mz hybrid
you got it.... you can use the 94-96 1mz system too if you want a stock setup... but obviously you dont... i am using the aeromotive regulator (stock reg removed) with my stock return system.
you got it.... you can use the 94-96 1mz system too if you want a stock setup... but obviously you dont... i am using the aeromotive regulator (stock reg removed) with my stock return system.
Nah I think I will just custom fab it up myself then. I absolutely love one off custom stuff. I will have the fuel system, stainless downpipe and full stainless exhaust, aluminum tig welded intercooler piping, and stainless tig welded turbo charge pipe all custom one off pieces. I just like having the only custom pieces like that. I will post up updates soon!
I know, I'm working on fixing that, soon it shall be....5S-FTE !!!!! But thanks for all the info on the return system. I just need to figure out what fitting that is on the end of the fuel rail...
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i am using the aeromotive regulator (stock reg removed) with my stock return system.
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