Looking for some thoughts. I am getting ready to do injectors. I am also doing the air dog 2 fuel pump. I am seeing these regulated return kits. Heres what they are about:
The Driven Diesel Regulated Return Kit for the 03-07 6.0L Powerstroke Super Duty is an important part of the fuel system upgrade process. This kit eliminates the "dead-head" stock fuel rails and provides adjustable fuel pressure capability to the Powerstroke fuel system. This is done by tying the end of each fuel rail together through a Bypass Fuel Pressure Regulator. The Driven Diesel Regulated Return Kit also includes replacement Fuel Feed Lines (from the fuel filter to the cylinder heads) that replace the stock lines and banjo bolts/check valves with larger high flow units.

The primary benefits of this kit are significantly increased fuel flow "through" the heads, ensuring that each fuel injector has adequate fuel quantity and pressure all the time. Additionally, any air "bubbles" that may develop in the fuel system can pass through the heads and out the regulators return port to the tank, instead of through the fuel injectors...resulting in increased injector life and less injector noise. If you are installing new injectors (stock or aftermarket), we HIGHLY RECOMMEND this kit to protect your investment

Are these worth doing? Anyone running them already? What about the air dog 2? Anyone have thoughts or issues with those?
Thanks in advance

 

Anyone? Any thoughts about these fuel system upgrades?

 

Skip the RR kit. Buy a sump, AirDog 150, do the blue spring update, swap in 6.4L banjo bolts. Install a fuel pressure gauge and see what happens.

Since you didn't state the exact size of injectors you are going to this is the best I can offer you.

 

From what ive read most people do one or the other. RR or Airdog 2. I see it as RR opens the back of the heads so even with an Airdog 2 wouldn't that be a benefit and improve performance? Little costly though.

 

I did ad2, 6.4 banjos, blue spring, and am planning sump in bottom of tank since air dog is better at pushing than pulling fuel. I'm thinking connect rear of heads with crossover, but haven't seen enough positive to make it a priority. I would like to hook gauge into rear crossover so you could monitor fuel pressure after injectors and see how much pressure is lost @ last injector on each side. I'm still on stock tune and injectors too. Just at 198000 mi I'm keeping it all together as long as possible. I really want studs and sct with Eric's tunes next but waiting for the funding in case I open a can of worms. .

 

Without knowing what the pressures are we all are guessing we "need" a RR kit. It's not a "need" it's more of a "want".

 

Hey,
Yea I guess giving some information would help. I have done : EGR delete, Studs, Blue Spring, Banks Ram air intake with a CFM Large elbow 4" straight pipe into dual exhaust. I am doing 190cc injectors, I am also installing the air dog 2 and the banjo bolts with the injectors. I have a set of gauges but the fuel is electronic and I know its wrong so I don't trust it one bit. Would much rather have a mechanical gauge in there. I don't want to throw money at it if I don't "need" to but I don't want it to cost more in the long run.

 

How will it cost more to put on less parts when they aren't needed?? I suggest you use an AD150 and a sump. Watch the fuel PSI when you run the 190's, add the RR WHEN you know the PSI drops too low.

 

That's why I was thinking a crossover at the rear with a gauge. Not big outlay of cash if u are creative and you will see pressure after injector drop if you add gauge in back. I know we can see pressure before injectors at test port but I'm curious how much drops after getting to rear injectors and after the next round of mods! Just looking for the actual real world pressure. If you use big tunes and big injectors you will have a baseline comparison too.

 

There was someone that was going to run the rail numbers out the back. I haven't seen any postings yet.