: Return Style Fuel System
11-09-2005, 10:49 AM
I have been doing some thinking and I came up with an idea for a return style fuel system and wanted some other peoples input.
My stock fuel rail has been drilled, tapped, and fit with a sending unit to monitor rail pressure.
Would it be possible to take out the sensor, put in a T fitting, check valve (if needed) and run a return line to the tank and have a functioning return style fuel system for the Focus??
If this would work could it help with fuel supply problems in the higher boost applications?
11-09-2005, 05:28 PM
Nope , Nope and Nope
11-09-2005, 07:21 PM
Originally posted by 1turbofocus
Nope , Nope and Nope
Crap! Crap! and Crap!
Oh well...... just a thought[thumb]
11-09-2005, 08:28 PM
[paranoid] Wait, do we see a fuel cell in your future? [paranoid]
11-09-2005, 09:21 PM
y wont it work?
all you have to do is tel the ecu.
we had a focus with a return line system in florida.
just want to learn
11-09-2005, 10:37 PM
JSSVT04 and here all this time from listening to you i thought you knew it all
It isnt as easy as "all you have to do is tel the ecu. "Much more needs to be done to make it work correct and safely
11-09-2005, 11:59 PM
first you would have to tell the computer to provide a constant fuel pressure, always the same pressure. then you would need to customize the fuel rail so that you could have a vacuum controlled fuel pressure regulator on it. then fabricate your return line to go back to your tank, and make up some way to attach it to the tank without screwing up certain emmissions sensors on the fuel tank. that only covers the mechanical changes needed to run a return style fuel system. the computer then needs to be retuned for the new fuel pressure ratings, and the injector pulse width modified based on the new fuel pressure. I think that's pretty much all the basics. not worth the time or money IMO. besides, why would you want to run your fuel pump at a higher pressure than you actually need, just so you can bleed off some pressure? are you trying to burn out your fuel pump early?
11-10-2005, 08:05 AM
well if i was going to do a return i wouldnt use the stock pumps. i think they are going to be small.
i can get anything made. i have a c&c machine next door. so i can get all that made. it is not hard to run a line to back to the tank, but drilling the hole will be a little challenge.the stock injectors are not going to be used
well i dont think i'm going to use my ecu much longer (i'm going to trying something)
im not scared to try something new or different. i want people to show off these cars. just think about it. look how old these cars are and we have a mag already, and it took mustang like 15 - 20 yrs to get there's hahah. that show you how these cars are growing. just something to talk about.
11-10-2005, 09:44 AM
There has been return fuel systems on the Focus and working for 3 years now , it can be done but isnt needed for less than 350HP at the wheels
Why wouldnt you keep using your stock ECU there isnt anything out there better , you would be backing up
11-10-2005, 10:17 AM
350 really hmmm thx i need that info.
i'm talkin to people about something to put inplace of the ecu.
11-10-2005, 11:44 AM
11-10-2005, 01:47 PM
tell you the turth, i have been playing around w\ a aem ems on different cars. i like it alot. but i just called aem and WOW that guy was a jerk to me. i still think we can use but it would be hard to find all the wires. so i may try it later next yr.
11-10-2005, 06:52 PM
It still uses the stock ECU to make it work , it also will have some issues with the Ford ECU in the Focus
The only + to the AEM is the ROM ability to do real time other than that is is slower than the stock ECU and much less things it will do
11-10-2005, 07:51 PM
like what? wha are you using in ur car? white one
i have a couple in mind.
11-10-2005, 08:32 PM
Stock ECU , Diablo Chipmaster Chip
The list is far to long to list all the things the AEM wont do that the stock ECU will
11-10-2005, 11:07 PM
what do you mean? can you set up a 2 step with the ecu, boost controller, Wet or Dry Nitrous set up. there alot that thing can do. automapping. i mean it would be very hard to put in, but if you got it work. i think, it would make it alot more easier to set up, than with a diablo or sct.
i dont have a dyno but i really dont want it dyno tune. i was it street tune. u can tune while driving the car. i havent tried that what my diablo yet, if i can?
plus i was walkin at nopi and 8 of 10 team had the aem ems. so it has to be somewhat good if that many team have them already. im not trying to start a fight. i just learing like everyone else.
11-10-2005, 11:25 PM
The one thing that is cool about the stock computer is that all the tables for things like idle and off throttle decel etc etc etc are already there and all the work has been done by someone else ( Ford ). There are countless hours in that stuff...so the majic " stand alone" that everyone loves to talk about is not worth all the work unless you are talking about something all out that the stock computer cannot do...Setting up a stand alone system is a nightmare that most folks can't even imagine...
You can just work with the parts of the tables you need to fix...much easier.
11-11-2005, 08:22 AM
Everyone that talks down the Diablo or the SCT i allways find they dont understand how it works , They are both simple tuning devises to use , Granted the SVT is a little harder because of flashing and the time it takes but there isnt anything i cant do with it
Will it do "2 step with the ecu, boost controller, Wet or Dry Nitrous set up." no not those exact things as the AEM will do BUT if your running these things where you need tuning the Ford ECU has the ability to tune for them
As for the NOPI guys running them sure they are they dont have the Diablo or SCT to be able to do the tuning like we do , I have worked a lot with the AEM im even BETA testing some of there new stuff , Do the SCT PR if you want the ability to do your own tuning on your SVT
I have 12 Co. tuning devises at my shop that i use on Diff cars , For the Focus you cant beat the Diablo or SCT PR for tuning
11-11-2005, 02:39 PM
hmmm i got to look more into the ecu.
i got to find more about the fuel tank. b\c im going to need a return line back.
11-11-2005, 05:37 PM
You know, AEM does make the universal EMS... if someone here happens to have the wiring code to the factory PCM I could design the molex plug adapter we need to utilize these fabulous beasts. I know of a company here in Dallas that will pour the mold and produce the plugs.
They are expensive initially to get the mold made, but after that the parts are pretty cheap. If there is enough owners out there interested, I might consider having them made to sell for all renditions of the Focus.
Just a thought
11-11-2005, 10:07 PM
The question is still why do the AEM with the SCT pr out there to use ???????
11-12-2005, 01:00 AM
11-12-2005, 07:05 AM
Why use the AEM when everyone now has the ability to buy the SCT pr , I think the SCT even cost less
The end result will most likely still be the same , A tuned car but i think the AEM will end up being harder to use and no one out there to be able to help
11-12-2005, 10:34 AM
the aem does not look hard to use. you have a map for everything,and you can tune it while you drive down the road. it also tells you how and what to do, if you get in a problem. i never tune w\ the pr or the sct. i have been playing around w\ one in y car and im getting mad at it b\c it still not taking the tune off my car and pulling codes. so im scared to take it back to ford for work.
just the only thing hard about it would be putting it in the aem.
11-12-2005, 06:57 PM
Yes the big and in my opinion the only + with the AEM is the ROM=ROMULATOR Real time tuning meaning as the car idles or is running you can see at what load and RPM the ECU is getting the reading from for the next engine rotation , so lets say as you were in wot and the load was 80% at 4000 that cell is lit up and you can see exactly where it is moving to in real time with both fuel and timing
I just did an 240SX turbo today with the AEM
All that being said it it still just a giggy back to the stock ECU and piggy backs have issues and you have to be carefull with them
11-12-2005, 08:18 PM
The UK Focus uses return style fuel system, why do you want it?
whats the benefit?
11-12-2005, 11:32 PM
because i'm going to need it soon. i have something coming up