• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech

stock fuel pump ok with 24lbers & H/I/C?

  • Thread starter Thread starter staticc
  • Start date Start date Dec 24, 2003
S

staticc

Founding Member
Sep 28, 2002
234
0
0
Jupiter, FL
Dec 24, 2003
#1
  • Dec 24, 2003
  • #1
i know i SHOULD upgrade my fuel pump at the same time as the 24lb injectors and mass air.. but, lack of money. so

will it be ok to run the 24lb setup, with my H/I/C engine?
 

TIMMY2734

Founding Member
May 17, 2002
1,330
1
36
Queens, NY
Dec 24, 2003
#2
  • Dec 24, 2003
  • #2
You may be able to, but i would get a new pump if i were in your shoes.Youve spent over $1000 on your combo, find another 100 bucks and get it done with
 

5spd GT

"the 5.0 owns all"
Founding Member
Aug 7, 2002
9,516
6
99
Arkansas
Dec 24, 2003
#3
  • Dec 24, 2003
  • #3
You're fuel pump will be fine....just set your fuel pressure a bit higher.....
 

Michael Yount

Mustang Master
Apr 10, 2002
9,039
6
79
Charlotte, NC
Dec 24, 2003
#4
  • Dec 24, 2003
  • #4
How in the world did you get a GT40 upper to work with a stock lower? The runner shapes are entirely different.

Sorry - can't help you with your fuel pump question. Although I always find it amusing that my stock Volvo fuel pump designed for a 122 cubic inch Volvo 4 cyl. will support 300-400HP without changing anything. Overdesigned I guess.
 

BlackFox5.0

Founding Member
Aug 7, 2000
3,514
1
0
Massachusetts
Dec 24, 2003
#5
  • Dec 24, 2003
  • #5
I think he means he has the stock gt40 lower

I would get a fuel pump, you might really lean out....

Look on ebay you can get them brand new for under $100
 
S

staticc

Founding Member
Sep 28, 2002
234
0
0
Jupiter, FL
Dec 24, 2003
#6
  • Dec 24, 2003
  • #6
BlackFox5.0 said:
I think he means he has the stock gt40 lower

I would get a fuel pump, you might really lean out....

Look on ebay you can get them brand new for under $100
Click to expand...

actually, im not sure if the lower is stock, or gt40
 

Michael Yount

Mustang Master
Apr 10, 2002
9,039
6
79
Charlotte, NC
Dec 24, 2003
#7
  • Dec 24, 2003
  • #7
If it's a GT40 upper, it's a GT40 lower; same lower is shared by the GT40, Cobra and Explorer uppers.
 

cevtv

Founding Member
Sep 15, 2002
1,113
0
37
Massachusetts
Dec 24, 2003
#8
  • Dec 24, 2003
  • #8
Stock on top, GT40/Cobra on the bottom.......

 
S

staticc

Founding Member
Sep 28, 2002
234
0
0
Jupiter, FL
Dec 24, 2003
#9
  • Dec 24, 2003
  • #9
Michael Yount said:
If it's a GT40 upper, it's a GT40 lower; same lower is shared by the GT40, Cobra and Explorer uppers.
Click to expand...

well im positive the upper is a GT40, theyre easy to spot. ill take pictures tomorrow
but bottom. cant tell
unless it just wont fit the stock lower.
 

Michael Yount

Mustang Master
Apr 10, 2002
9,039
6
79
Charlotte, NC
Dec 25, 2003
#10
  • Dec 25, 2003
  • #10
staticc - see the pics above - the stock and GT40 pieces don't mix; if you've got the GT40 upper, you've got the GT40 lower too.
 
S

staticc

Founding Member
Sep 28, 2002
234
0
0
Jupiter, FL
Dec 25, 2003
#11
  • Dec 25, 2003
  • #11
Michael Yount said:
staticc - see the pics above - the stock and GT40 pieces don't mix; if you've got the GT40 upper, you've got the GT40 lower too.
Click to expand...

i wouldnt doubt whoever had my car before me of mixing the two.
they were dumb enough to not match the cylinder numbers on the sparkplug wires. so the lengths were all wrong. and he burned many of the boots. one is just beind held together by duct tape..... not to mention he tied them up with plastic ties.. tieing 4 plug wires as close as possibly =

oh well. i redid them all when i got it. and im ordering a whole new ignition system and 24s... ill take care of this car the right way
 

BlackFox5.0

Founding Member
Aug 7, 2000
3,514
1
0
Massachusetts
Dec 25, 2003
#12
  • Dec 25, 2003
  • #12
It's psychically impossible to mount a GT40 upper to a Stock lower, unless he made some kind of adapter, which would just be morally wrong and defeat the purpose of having a GT40 Upper, If you are positive you have a GT40 upper, then you DEFINATELY have the GT40 lower as well, period.
 

Michael Yount

Mustang Master
Apr 10, 2002
9,039
6
79
Charlotte, NC
Dec 25, 2003
#13
  • Dec 25, 2003
  • #13
Thanks Black Fox - that's what I was trying to say, but I guess he saw something different in the picture than I did. The bolt patterns don't line up.
 
You must log in or register to reply here.

Similar threads

T
Fuel Looking for a little guidance
  • Tufgriz
  • Sep 11, 2025
  • Fox 5.0 Mustang Tech
Replies
9
Views
368
Fox 5.0 Mustang Tech Sep 12, 2025
Noobz347
T
  • Locked
Digital Tuning A9l issue or something else
  • Tufgriz
  • Sep 11, 2025
  • Fox 5.0 Mustang Tech
Replies
2
Views
292
Fox 5.0 Mustang Tech Sep 11, 2025
Noobz347
1
Engine 91 mustang 302 Low acceleration car backfires pops and acts like it doesn’t want to take fuel
  • 1991Fox5.0
  • Oct 4, 2025
  • Fox 5.0 Mustang Tech
Replies
16
Views
1K
Fox 5.0 Mustang Tech Oct 6, 2025
1991Fox5.0
1
Engine Popping noise in the intake. Frustrated still.
  • esteban31065
  • Apr 6, 2025
  • Fox 5.0 Mustang Tech
Replies
15
Views
1K
Fox 5.0 Mustang Tech May 23, 2025
gkomo
F
2004 Mustang GT – Fuel Pump Not Priming
  • Fayio
  • Apr 22, 2026
  • SN95 4.6L Mustang Tech
Replies
7
Views
327
SN95 4.6L Mustang Tech Apr 27, 2026
n0v8or
N
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 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?