quote Originally posted by Hudini: Ryan, can any adjustable fuel pressure regulator be used for this setup? Also, would it be possible to use this type setup with the 7730 ECM? (Since fuel pressure does not vary as in the vacuum regulator type system) Hugh

I have a concern that splicing in the Fuel pressure regulator to the returnless single line fuel rail line won't provide as much fuel pressure as if the regulator was on the end of the rail as on a standard return type rail. . I adapted a similar system on my 3800SC series III and it seems like the fuel presure gauge at idle hovers around 40 psi instead of 43 psi. It may work fine but I'm just not certain about doing it this way. As for adjustablility, I'm all for it but it would require taking off the o ring and changing the internals (cover and mechanism) .
or adding an aftermarket unit. BTW, GREAT job on this installation...neat clean, uncluttered and very well done.

As for the comment that was made on the ETC my observaton agrees. My daily driver is a Chrysler 300 and the ETC is sluggish and soft. GM's ETC system is far better but since I didn't know what to expect, my 3800SC uses a cable operated N* TB w an LS1 MAF (with thanks to Ryan for supplying the LS1 MAF table that we inserted into the program) Runs great now.

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87GT - 3800SC Series III engine, 3.4" Pulley, N* TB, LS1 MAF, Flotech Exhaust Autolite 104's Custom CAI 4T65eHD w. custom axles, HP Tuners VCM Suite.
87GT - 3.4L Turbocharged engine, modified TH125H
" I'M ON THE LOOSE WITHOUT THE JUICE "

quote Originally posted by Dennis LaGrua: I have a concern that splicing in the Fuel pressure regulator to the returnless single line fuel rail line won't provide as much fuel pressure as if the regulator was on the end of the rail as on a standard return type rail. . I adapted a similar system on my 3800SC series III and it seems like the fuel presure gauge at idle hovers around 40 psi instead of 43 psi. It may work fine but I'm just not certain about doing it this way. .

I run a returnless fuel setup on my 3800SC swap and have been for about 6 months with no issues. I used the stock FPR cut off the stock rails and adapted it with the correct fittings. I ran a on board FPG on the rail for about a month to keep an eye on the fuel pressure. I have been to the track twice since installing this setup and ran the car all out with no fueling issues. The setup works and has been proven many times.

quote Originally posted by MstangsBware: I run a returnless fuel setup on my 3800SC swap and have been for about 6 months with no issues. I used the stock FPR cut off the stock rails and adapted it with the correct fittings. I ran a on board FPG on the rail for about a month to keep an eye on the fuel pressure. I have been to the track twice since installing this setup and ran the car all out with no fueling issues. The setup works and has been proven many times.

You describe my setup perfectly. I guess that my concerns were unfounded, but whenever you deviate from stock the new approach must be tested. You have apparently done this. I have had no fueling problems so far either but haven't had the car on the track as you have. Now I can enter the 2009 season with some peace of mind. .

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87GT - 3800SC Series III engine, 3.4" Pulley, N* TB, LS1 MAF, Flotech Exhaust Autolite 104's Custom CAI 4T65eHD w. custom axles, HP Tuners VCM Suite.
87GT - 3.4L Turbocharged engine, modified TH125H
" I'M ON THE LOOSE WITHOUT THE JUICE "

quote Originally posted by Dennis LaGrua: I have a concern that splicing in the Fuel pressure regulator to the returnless single line fuel rail line won't provide as much fuel pressure as if the regulator was on the end of the rail as on a standard return type rail. . I adapted a similar system on my 3800SC series III and it seems like the fuel presure gauge at idle hovers around 40 psi instead of 43 psi. It may work fine but I'm just not certain about doing it this way. As for adjustablility, I'm all for it but it would require taking off the o ring and changing the internals (cover and mechanism) . or adding an aftermarket unit. BTW, GREAT job on this installation...neat clean, uncluttered and very well done. As for the comment that was made on the ETC my observaton agrees. My daily driver is a Chrysler 300 and the ETC is sluggish and soft. GM's ETC system is far better but since I didn't know what to expect, my 3800SC uses a cable operated N* TB w an LS1 MAF (with thanks to Ryan for supplying the LS1 MAF table that we inserted into the program) Runs great now.

It does not matter where the fuel pressure regulator is mounted in the fuel system AS LONG AS you don't have any restrictions between the point where the regulator ties into the pressure line and the fuel injectors. If you had a restriction say in the fuel rail inlet, then yes you could have a fuel pressure drop in the rail compared to the rest of the system.

-ryan