• Mustang Forums
  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang Tech

Educate me about fuel systems please.

  • Thread starter Thread starter usaf_branham
  • Start date Start date Dec 29, 2011

usaf_branham

15 Year Member
Oct 30, 2008
927
134
84
Boston
Dec 29, 2011
#1
  • Dec 29, 2011
  • #1
I am probably going to have to get a new fuel pump. The stocker will probably not cut it with 36lb injectors. So, I am trying to weigh my options.

Who makes a drop in style fuel pump for an 04 GT Fuel tank? I have heard I can run a walbro gss342 (255lph) in my gt tank with the returnless setup. I know that the aeromotive 340 lph stealth pump (11142) will fit as a direct replacement to a walbro 255 lph. So, other than drilling some holes in my basket, do you think I will run into any issues with anything else?

I am a little uneducated in fuel systems, and I am trying to learn as I go.

As much as I would love to run a return style setup, my budget will not accomodate that. So, I have to come up with something that will work, and still not break the bank. So, realistically, what can I do for under $200. I am currently running a boost-a-pump on stock fuel pump w/ kb 36 lb injectors. Cams are going in when they get here, and the tuner said that the injectors will work if i can get them enough fuel. What do you guys suggest?
 

usaf_branham

15 Year Member
Oct 30, 2008
927
134
84
Boston
Dec 29, 2011
#2
  • Dec 29, 2011
  • #2
wow. i am fairly surprised. no one on this forum has a 98 thur 2004 gt with the returnless fuel system with advice on how to exceed the stock max w/ a boost-a-pump? hmm. ok?!
 

trinity_gt

10 Year Member
Jan 31, 2003
3,125
81
99
Canada
Dec 29, 2011
#3
  • Dec 29, 2011
  • #3
I've got 36# injectors and the OE pump is doing fine with a BAP.

I would look into a Cobra or Ford GT in-tank setup or a Focus SVT pump before looking at something like the '342 which, unless I'm mistaken, is not compatible with the returnless FPDM setup on later GTs.
 

Three50won

10 Year Member
Jul 11, 2010
1,135
64
69
Dec 31, 2011
#4
  • Dec 31, 2011
  • #4
usaf_branham, most companies will point you in the right direction. Call Summit Racing, RPM Outlet, or any of the other numerous companies. You can get a 255 LPH pump for a little over $100. I wouldn't go under a 255 LPH. That should be all you'll need for now. You can get a BAP later if you start making more hp than the 255 can handle.
 

Rick 91GT

Mustang Master
Nov 29, 1999
9,692
95
99
PA
Dec 31, 2011
#5
  • Dec 31, 2011
  • #5
While the pumps you mention will go into the stock hat they require a little grinding as well to make them fit.

If you want a drop in upgrade the single SVT Focus pump kit is 3S4Z-9H307-BC it includes the sender and runs about $250.00, I use this up to about 450-500hp and since you have the Boost-A-Pump you could squeeze a little more out. IF your planning more mods and lots of power then I see a return style system in your future

You can find the pump only on ebay a lot cheaper, the real pump use to be black with a green top...been awhile since I bought one.
 

usaf_branham

15 Year Member
Oct 30, 2008
927
134
84
Boston
Dec 31, 2011
#6
  • Dec 31, 2011
  • #6
Well, after a TON of research, I have decided to drive over to summit racing and pick up an oem replacement motorcraft part for the Ford GT Supercar. It is actually less expensive than the SVT Focus Pump (and I think it flows more). I heard the Focus pump is 255lph and the GT pump is 310lph, although I am not 100% sure about that. The other thing I am not sure of, is if this pump is going to have any issues with my 20 amp boost-a-pump. I have heard the focus pump doesnt like the boost-a-pump. I hope the same doesnt go with the GT pump.

Im going to buy some submersible fuel hose and do a pprv delete while im at it. I also plan to drill holes in the front and bottom of the fuel basket.
 
You must log in or register to reply here.

Similar threads

Fox Fuel Pump Issues After Replacement/Upgrade
  • Ryu
  • Jun 23, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
15
Views
254
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Monday at 9:24 AM
keel
A
Fuel Capable fuel system for +600hp
  • Avia.tuned
  • Feb 24, 2026
  • SN95 4.6L Mustang Tech
Replies
1
Views
85
SN95 4.6L Mustang Tech Feb 24, 2026
squeak93
M
01 mustang 3.8 fuel pressure issue
  • Mhaley2006
  • May 29, 2026
  • 1996 - 2004 SN95 Mustang -General/Talk-
Replies
0
Views
87
1996 - 2004 SN95 Mustang -General/Talk- May 29, 2026
Mhaley2006
M
J
Fuel pump question
  • jay99914
  • Feb 24, 2025
  • SN95 4.6L Mustang Tech
Replies
3
Views
298
SN95 4.6L Mustang Tech Mar 5, 2025
89ripper
B
'03 GT Fuel Pump/Pressure/Delivery Issue
  • Brodach
  • Oct 21, 2025
  • SN95 4.6L Mustang Tech
Replies
8
Views
853
SN95 4.6L Mustang Tech Oct 31, 2025
gkomo
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?