I was just wonedering for the people with eco's running more then 10 psi what kind of fuel set up are you using.
I want to run between 10-12 psi and right now all I have for fuel is an SDS EIC w/ two 42lb injectors
I just wanted to know if that would be efficient or should I get something else (I also have a walbro 255)
Also if anyone has any pointers on a turbo install on an eco that would be great ---
fuel pump if you have all those other things is really all you need
1989 Turbo Trans Am #82, 2007 Cobalt SS G85
fuel pump and a set of 450cc injectors is really all you need
you go the injectors covered so, a fuel pump is all you need
LE61T PTE6262 Powered 
also an adjustable fpr is nice for fine tuning
1989 Turbo Trans Am #82, 2007 Cobalt SS G85
Thanks guys i will keep it as is for now and I will get an fpr soon
oh you def need an afpr to turn your base pressure down or you wont ever idle with 450's
LE61T PTE6262 Powered
what does the EIC do then ?
also will and msd afpr be fine?
I guess since they are soo cheap i just will go ahead and buy one it couldn't hurt
if you dont want to play around go with a DFI Gen VII! thats the @!#$ boy!
i run on my customers cars the Digital Fuel Management Unit...it addes fuel per boost in increments...so you can fine tune your a/f and then set it and leave it!
My butt, you need the AFPR.
I am running 11 psi on stock Eco right now with FMU, 1:1 no disk in it.
Blazer pump, and 450 DSM injectors on a 2002 rail, with a 50 psi stock base and WOT fuel pressure.
S-AFC leaned out 50%.,
The car is fine and on WOT and 11 psi EGT's are right around 1400 which is plenty safe. I also ran 13 one time by mistake.
13.8 at 106 mph with a 2.2 60 foot.
Best time:"""11.946""" @ 114.73 mph @17psi 1.83--60"
11 second daily driver!!!!
Race Related 727-561-9440
Shop of choice for your 11 second J body!
Also, built bottom end and or top end LSJ and L61's available.
13's
----12's
----11's
----10's
I came across this thread and I thought of myself a year ago. I apologize for the length.
The SDS EIC is an EXTRA injector controller. (04 ecotec LS Sport) has stated he has 2 EXTRA injectors, meaning he will be placing these before the throttle body and adding fuel that way and leaving the stock injectors in place. He will have NO idle issues with these injectors because they will not even add fuel until he is under boost. There is no need for a FPR with the SDS EIC.
I wasn't going to make a long post but let me share my experience with the SDS EIC.
I have an 03 turbo charged cavy. I originally bought a turbo kit from HAAS (No that is not a typo and I do not mean HAHN) With the kit came the EIC and 2 36 lb injectors. Let me tell you one of the worst parts of this kit was the EIC. Adding fuel with the EIC did work but only to about 4300 RPMs. Up to 4300 RPM's I could get a good tune 11's 12's across the board but at 4300 RPM's the EIC would freak out and go to 100% injector duty cycle. All this Tuning was done on a dyno. no matter how I adjusted the EIC I would always be SUPER rich 9:1 by 5100 RPMs. I sought the help from SDS and we determined that the Tach signal was becoming unreadable. he suggested purchasing a tach driver to provide a cleaner signal to the EIC. After purchasing the MSD tach driver the problem was still there. There was also another guy who had bought the same kit from HAAS with the EIC. He had the Exact same problems as i did. I eventually drove out to this guys house determined to find a fix and also to see how his car was setup. We both had the exact same fuel problems. The car was getting too rich and the SDS EIC was just not capable of tuning these injectors with the precision i needed. I can guarantee you will have this problem because I invested nearly 2 months worth of trouble shooting. I'm half asleep as I'm typing this, so if none of this makes sense let me know and I will clear it up for you.
My final solution to this problem was to sell that piece of crap EIC and buy another type of extra injector controller recommended by some folks I know. It's the 034 EFI.
http://034efi.com/ Let me tell you. I have had this installed for about 1 month now and i have the car holding 11/12's all the way to the red line. If you want to go with extra injectors i would highly recommend this option. Most folks on here will tell you to not use extra injectors but instead replace your stock injectors with bigger ones. I'm not trying to have that argument, because both methods are technically a band aid. ideally you want a stand alone and no one on here will argue with that. The ecotecs are hard to tune because the ECU is constantly trying to achieve a 14.7:1 AFR. This makes it hard to get a consistent tune. At WOT myself and others have had great success, but when the car is not at or does not think it's at WOT it tries to get back to 14.7. It's one smart SOB. This is one of the reasons I was hoping for HP tuners to get started on our cars, but as stated in many posts on here, it never happened. A full stand alone is without a doubt the best option for the ecotecs. Can you make The EIC work - sure but you will be rich like you wont believe and the backfires will let you know. You will also suffer from major power loss and misfire all the way down the track.
Why did I just take so much of my time to type this out... hopefully it will save you some money and at the very least get you on a different path because the SDS EIC is not the way to go. If you have made up your mind on using EXTRA injectors and of course a bigger fuel pump check out the 034 EFI supplementary controller, it's cheaper then the EIC and you have much more control over the injectors, You will need a laptop to tune this though. I am using 36lb injectors placed before the throttle body and the walbro 255 fuel pump and I have plenty of room left with these injectors. I have had the boost turned up to 15 psi at one point and still plenty of fuel....
<img src="http://registry.gmenthusiast.com/images/twistedsystem/personal_pic.jpg"</img>
Just do it right with the injectors.
Like it was meant to be.
Best time:"""11.946""" @ 114.73 mph @17psi 1.83--60"
11 second daily driver!!!!
Race Related 727-561-9440
Shop of choice for your 11 second J body!
Also, built bottom end and or top end LSJ and L61's available.
13's
----12's
----11's
----10's
SunCavi_L61T3/T04E wrote:My butt, you need the AFPR.
I am running 11 psi on stock Eco right now with FMU, 1:1 no disk in it.
Blazer pump, and 450 DSM injectors on a 2002 rail, with a 50 psi stock base and WOT fuel pressure.
S-AFC leaned out 50%.,
The car is fine and on WOT and 11 psi EGT's are right around 1400 which is plenty safe. I also ran 13 one time by mistake.
13.8 at 106 mph with a 2.2 60 foot.
First have you been on the dyno with this setup to see what your air/fuel is? not asking what your EGT is but what your air/fuel is?
I will beat money you are running super rich at idle. A AFPR might not be needed to run, but will allow better tuning.
FU Tuning
SunCavi_L61T3/T04E wrote:My butt, you need the AFPR.
I am running 11 psi on stock Eco right now with FMU, 1:1 no disk in it.
Blazer pump, and 450 DSM injectors on a 2002 rail, with a 50 psi stock base and WOT fuel pressure.
S-AFC leaned out 50%.,
The car is fine and on WOT and 11 psi EGT's are right around 1400 which is plenty safe. I also ran 13 one time by mistake.
13.8 at 106 mph with a 2.2 60 foot.
you are running a FMU? i was not aware you had a fuel return line? the EFMU i use runs off the the exsisting fuel line not the return line to back up pressure this physically ads pressure!
Alright i guess i will just make a new post n which I try to figure out who has a fuel system for the eco that run near flawlessly
I have no problem selling the EIC and the 2 42lb injectors and buying some GMSC 310cc injectors an FMU and a AFPR
but i would really like to know if that would work or would I run into new or similar problems
-- What about an emanage has anyone had success with that on an eco? --
--I am having a hard time finding good posts about fuel systems on the eco but I am finding alot of bad ones
-- Higgins what was josh running on his when he had it?
was it running well or not?
i know for a while he was using a nitrous fuel seliniod
------- any help is appreciated I am not set on anything yet --------
Ok guys look at my post, and then doubt my fuel set up.
Best time:"""11.946""" @ 114.73 mph @17psi 1.83--60"
11 second daily driver!!!!
Race Related 727-561-9440
Shop of choice for your 11 second J body!
Also, built bottom end and or top end LSJ and L61's available.
13's
----12's
----11's
----10's
I wouldnt get the GMSC injectors. I remember reading (i cant remember his username) but he had better luck with the ford red tops than he had with the sc injectors. I dont think there big enough anyways. Im starting to dobut my setup. I have 30# ford injectors, fmu, afpr, and walboro pump. Im gonna have to crank my fuel pressure up to like 90psi to make 220hp. I predict myself having to upgrade to 42# and get a safc. Hopefully I finish my install tommorow so I can start tuning it.
yeah that was me...do not use gmsc with your turbo setup..even tho there very convient to just plug in and play injectors...they are not good unless you own the gm s/c and re-flash etc;
I highly reconmend the ford red tops. too bad they dont have a high imp injector in between the 30lbs and 42lbs =( i would be using the 36lb;s if they were high imp =/
I started with the S/C injectors on my 2.4 turbo setup, worked great till about 10psi, but I didnt have the FMU, so they should be able to hold out for longer. I switched to the Ford RED tops, and they worked fine for me at 15psi, still no fmu.
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04 ecotec LS Sport wrote:Alright i guess i will just make a new post n which I try to figure out who has a fuel system for the eco that run near flawlessly
I have no problem selling the EIC and the 2 42lb injectors and buying some GMSC 310cc injectors an FMU and a AFPR
but i would really like to know if that would work or would I run into new or similar problems
-- What about an emanage has anyone had success with that on an eco? --
--I am having a hard time finding good posts about fuel systems on the eco but I am finding alot of bad ones
-- Higgins what was josh running on his when he had it?
was it running well or not?
i know for a while he was using a nitrous fuel seliniod
------- any help is appreciated I am not set on anything yet --------
He has stock injectors, FMU (his was not adjustable, I think 12:1). When he turned up the boost past 8psi he was using the fuel solenoid for the nitrous for the extra fuel (with big jets). It ran fine (it would backfire when you first hit WOT and the fuel kicked in), but ran EGT's right at 1500 (which was perfect for that car). I would not recommend doing that way.
Suncavi- I do not doubt your set up, but did you guys check to see how rich you are running at idle?
Speedracer- You did not have a FMU so how were you getting all your fuel under boost?
FU Tuning
