reg return.... why? - Ford Powerstroke Diesel Forum
6.0L Performance Parts Discussion What has or has not worked for you?

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post #1 of 34 Old 06-29-2014, 06:36 PM Thread Starter
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reg return.... why?

Just wondering why they are important I don't completely understand them. A lot of ppl do this mod just before I do all my work to the truck next year I want to know why this is a important mod
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04 f250 cc sb.
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post #2 of 34 Old 06-29-2014, 07:36 PM
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Its most crucial on engines that are being built to run big fuel. But as far as a reliability stand point it isn't a bad mod to ensure proper fuel supply to the injectors. I plan on going to a RR on my tow build in the future. To me it just makes more sense for my goals. Depending on what your goals are it may or may not be worth spending the money on.

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post #3 of 34 Old 06-29-2014, 07:43 PM
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To expand upon this, if you are dropping below 65psi on your fuel especially at WOT. You need to do a full fuel system upgrade and go RR along with a custom fuel pump set up.

2003 6.0L PSD Excursion Limited 4x4
Edge Insight CTS w/Dash Pod, EGT, TT, Back Up Camera
AMSOIL with REV-X
AMSOIL Bypass Oil Kit
GDS Fuel Spring
Diesel Site Coolant and Transmission Filters
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post #4 of 34 Old 06-29-2014, 08:07 PM
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Originally Posted by Brew_WY View Post
To expand upon this, if you are dropping below 65psi on your fuel especially at WOT. You need to do a full fuel system upgrade and go RR along with a custom fuel pump set up.
Not entirely accurate. Ford spec is below 45psi before action is taken. The best and most power has been proven to come in the 54 to 56 psi range. 65psi is on the upper end of the spectrum of where you want it to be. Anything above 72ish you risk blowing o rings.

A RR is going to ensure you get the same fuel pressure to each injector by regulating after the heads instead of before add the stock system does. I've read and read on this subject because a RR system is not a cheap mod, when I'd you diy, and while I know it will help in not 100% sold because the fact that all the injectors in one bank don't fire at the same time.

Just do your own research and come to the best conclusion for your needs/wants.

FWIW I am currently running the "6.4 juggerpump mod" with larger fuel lines from tank to 6.4 pump then to 6.0 pump, stock pickup in tank, with 175/stock injectors 68-69psi at idle, drop as low as 52 at wot and I think my stock 6.0 pump is getting weak.

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post #5 of 34 Old 06-29-2014, 08:34 PM Thread Starter
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So this is psi of the fuel pressure mod. So if my pressure is dropping and the blue spring mod didn't help this would be something to look at? Can anyone expand on how this helps maintain it better then stock. The why makes sense just not the how.

04 f250 cc sb.
Egr block off, 4 inch turbo back ss magnaflow exhaust, billet turbo wheel, 05 Harley headlights, S&B intake, XDP coolant filter, tuned with Sct by PHP, BDS Dual rear add a leaf, Firestone ride rite airbags, 2 12 inch kicker subs, infinity rear speakers, mb quart frontdoor speakers, mb quart amp, autopumpkin Android headunit, torque pro.
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post #6 of 34 Old 06-29-2014, 08:45 PM
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Originally Posted by jmeaby View Post
So this is psi of the fuel pressure mod. So if my pressure is dropping and the blue spring mod didn't help this would be something to look at? Can anyone expand on how this helps maintain it better then stock. The why makes sense just not the how.
If the blue during didn't help chances are you have a weak pump.

It helps maintain "better" because the pressure is regulated after it goes thru the head, or has supplied the injectors with equal amounts and pressure of fuel.

What are your pressures reading at now?

05 250. Lariet. 4x4.
arp studs w/oem gaskets & all updates
Warren 175cc/stock sticks
Egr delete
Zoodad
New oil cooler
Coolant filter w/ zerex ec-1(homemade)
4" turbo back, straight piped
SCT livewire (running TSD SPD)
KC Turbos 1.5
Blue spring upgrade
riff raff boots
Ccv reroute (dump to atmosphere)
Air Horn Kit
high idle
Pro comp "bullet hole style" 17" w/ 35" nitto trail grapplers

Last edited by powerstrokecrzy; 06-29-2014 at 08:55 PM.
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post #7 of 34 Old 06-29-2014, 09:02 PM Thread Starter
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I don't have a gauge hook up right now I was gonna do it soon but I recently had surgery and cannot till closer to Dec. While I'm off work I have to much time to think so I start asking these questions haha.

04 f250 cc sb.
Egr block off, 4 inch turbo back ss magnaflow exhaust, billet turbo wheel, 05 Harley headlights, S&B intake, XDP coolant filter, tuned with Sct by PHP, BDS Dual rear add a leaf, Firestone ride rite airbags, 2 12 inch kicker subs, infinity rear speakers, mb quart frontdoor speakers, mb quart amp, autopumpkin Android headunit, torque pro.
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post #8 of 34 Old 06-29-2014, 09:36 PM
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Admittedly I haven't done a whole lot of research about regulated return fuel setups and I didn't bother with one primarily because of cost (although guys have pieced them together for less than the kits sold). I'm sure they have their benefits for some but I think a lot of guys have them that don't really benefit from them. I compare this to the trend of using an A1000 fuel pump. Are they a good pump and work well? Sure. Do I need a pump that supports 1000 horsepower? No. Benefit vs. cost. Sometimes we ignore this (myself included). However, if your future plans may benefit from a certain mod and it makes sense to do it now, then it may be worthwhile. I kinda wish I would have done the delta kit (I think that is what it is called) when I had my heads off. I think this would be a more beneficial mod to do for a daily driver/towing truck than a RR. But I could be wrong.

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post #9 of 34 Old 06-29-2014, 10:03 PM Thread Starter
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Delta kit just when I think I know the mods here is a new one

04 f250 cc sb.
Egr block off, 4 inch turbo back ss magnaflow exhaust, billet turbo wheel, 05 Harley headlights, S&B intake, XDP coolant filter, tuned with Sct by PHP, BDS Dual rear add a leaf, Firestone ride rite airbags, 2 12 inch kicker subs, infinity rear speakers, mb quart frontdoor speakers, mb quart amp, autopumpkin Android headunit, torque pro.
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post #10 of 34 Old 06-30-2014, 04:08 AM
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Quote:
Originally Posted by jmeaby View Post
Delta kit just when I think I know the mods here is a new one
What's the delta line kit?

I am setting up a RR kit for myself right now. Yes I think the parts are pricey but I think it is worth eliminating the stock "dead headed" design. I just did the 6.4 pump mod as well. Well worth it.

Chris- 2006 XL F250 44 LBCC, the "Don Schula express"..

Holder's 190/30s, custom reg return, 6.7 pump fuel system, custom built Amsoil oil bypass, custom ported intake and custom stage 2 GT4088 turbo, all built by me, BD diesel up-pipes and manifolds , Coolingmist methanol injection, studded, PMF traction Bars, deleted and oringed heads with some BPD goodies... with some love from Loxdce
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