Return vs. returnless fuel system
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Old January 4th, 2011, 06:17 PM   #1
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Return vs. returnless fuel system


What are the advantages and disadvantages of a return style fuel system compared to a returnless fuel system. Which is better suited for high engine fuel demands? I am under the impression that the returnless system is better because ford switched from return style to returnless. Right now I have the stock returnless system but it is in need of an upgrade so just wondering which route to go
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Old January 4th, 2011, 06:26 PM   #2
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If you are keeping within a reasonable hp level a returnless setup will work, but a return style is better because it can cope better with a sudden demand for lots of fuel without losing as much fuel pressure.
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Old January 4th, 2011, 06:31 PM   #3
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I know dual focus pumps will be good into the 500 hp range but if I were to run dual ford gt pumps shouldn't they be able to provide the extra fuel needed for 600hp under hard acceleration. I think I will just upgrade my current fuel system instead of switching over to the return style
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Old January 4th, 2011, 06:33 PM   #4
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how much power do you plan on making?
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Old January 4th, 2011, 06:41 PM   #5
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I am looking to be in the 600hp range
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Old January 4th, 2011, 06:49 PM   #6
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I have no engine to reference the proper returnless fuel system setup, so is it just a matter of running a y block off the fuel line from the tank and then a line to each of my fuel rails and then on the opposite side of the fuel rails just running a line between the two to equalize the pressure? Is there any fuel pressure sensor? Sorry for the questions just don't know much about the set up and I am not going to buy a kit because I can put a fuel system together for a lot cheaper.
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Old January 4th, 2011, 06:55 PM   #7
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return style is better for high demands. I wish i would have done it in the first place. I have redone my returnless system about 5 times now! Not only that.... but with a returnless system, its pretty common to have the "famous" hesitation between shifts that SUCKS ASS!!! Return style is the better way to go HANDS DOWN.
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Old January 4th, 2011, 08:10 PM   #8
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I was a big returnless guy and was going to keep that. But after researching it I am going return. It's esp better for higher hp E85 cars.

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Old January 4th, 2011, 08:43 PM   #9
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go with a return style, the only thing i would say is important on a return style fuel system is to have your return line moved away from the pick up line. this will help keep fuel temps down. but returnless is a pain and ends up costing more in the end. the only people who should stay with a returnless system is 400 hp less boosted people and n/a cars.
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Old January 4th, 2011, 08:59 PM   #10
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Cheaper to stay returnless for only 600rw.
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Old January 4th, 2011, 10:27 PM   #11
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Originally Posted by y2k02 View Post
Cheaper to stay returnless for only 600rw.
it is not much cheaper to stay returnless unless you skimp out on parts. a cobra gas tank cost just as much as a return style gas tank, cobra hat/pumps maybe cheap if you can find it any where used, but they are over 400 new if you can even find them new now. then a bap cost 240, your not saving much staying returnless, not to mention returnless systems are not nearly as boost friendly because of the stupid frps senser. not saying it is bad to be returnless its just hard finding the parts at the price to make it worth staying with. oh yeah and a fore hat is rediculus in price.
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Old January 4th, 2011, 10:49 PM   #12
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What else do you need to go Return style? Cobra tank with hat. Different fuel rails? Or something on the fuel rails? Ive been thinking about switching to return style too, but If its more expensive then keeping it returnless, and returnless can handle the same power as return style then why bother.
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Old January 4th, 2011, 10:53 PM   #13
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simply put a full return system is 1300 dollars. maybe alittle more than a built up cobra returnless system.
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Old January 4th, 2011, 10:57 PM   #14
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Damn, fuel is so god damn expensive. Fuck it Ill stay return style until my tuner tells me I should switch
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Old January 4th, 2011, 10:57 PM   #15
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Does anyone know where the thread is that gives you all the parts needed to put together a return style fuel system? I am about to start building mine... f staying with non return... My dual cobra pumps, bap and 80lb injectors are maxed at around 500hp.... gonna go ahead and get my car ready for a real head unit. ha
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Old January 4th, 2011, 11:00 PM   #16
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Are you going with the ysi trim? Ill search for the thread cause Im curious too.
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Old January 4th, 2011, 11:05 PM   #17
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All I could really find was bakers thread

lets talk return style.....
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Old January 4th, 2011, 11:06 PM   #18
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Im talking with vortech about some different ideas..... But im not gonna slack now.... i figure with a good head unit "3k", a good fuel system "2k" and another 1k in suspension my car could see in the 140mph range in the 1/4.... So, after buying a truck in a month or so, im gonna tell the wife "look, its either me spend 6k on this car at 1 time for parts, or i trade it for a fast fox body"... and she will say that she doesnt want me having a fox. So i win either way... lol
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Old January 4th, 2011, 11:08 PM   #19
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Originally Posted by Shaun03GT View Post
Damn, fuel is so god damn expensive. Fuck it Ill stay returnless style until my tuner tells me I should switch
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Old January 4th, 2011, 11:10 PM   #20
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Originally Posted by mystang0673 View Post
Im talking with vortech about some different ideas..... But im not gonna slack now.... i figure with a good head unit "3k", a good fuel system "2k" and another 1k in suspension my car could see in the 140mph range in the 1/4.... So, after buying a truck in a month or so, im gonna tell the wife "look, its either me spend 6k on this car at 1 time for parts, or i trade it for a fast fox body"... and she will say that she doesnt want me having a fox. So i win either way... lol
man that is the way i want you to go so bad! i know you would not be happy with a T trim or SI trim. your like me and there is no such thing as too much power.
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