• Mustang Forums
  • 1965 - 1973 Classic Mustangs -General/Talk-
  • Classic Mustang Specific Tech

Fuel system upgrade

  • Thread starter Thread starter Max Power
  • Start date Start date Feb 25, 2006

Max Power

Active Member
Jul 31, 2003
1,774
1
36
St Paul
Feb 25, 2006
#1
  • Feb 25, 2006
  • #1
I have a 69 fastback with a fresh 393 stroker with the Edelbrock RPM package. While driving it on the freeway last fall, it seems I am running the bowls dry when running down the freeway for a length of time. When pulling off the road, the bowls of course catch up and the car starts running again.

I rpelaced the filter, which had some resistence, but not bad, and put away the car for the winter. As spring is just around the corner, I think it is time for a fuel system upgrade. First thing to note; when getting all my parts for the complete build, I went with a stock pump, and the stock pump looks like it was for a 302 rather than a 351. The diaphragm was smaller that the previous 351 pump I had in there, and it matched the 302 pump in my Maverick. That could be problem number one.

In upgrading, I have read that engines making over 400 HP heed a larger diameter fuel line than the 5/16ths from the factory. The problem is that the system can only flow as well as it's smallest restriction, and the outlet from the fuel gauge assembly in the tank has a 5/16th outlet that would be tough to change without some custom welding.

I would like to stick "bolt-on", and I would like to stick mechanical, if possible.

What are you guys with similar applications using in your set-ups?
 
5

5.0ina66

Member
Jun 6, 2003
664
0
16
Ohio
Feb 25, 2006
#2
  • Feb 25, 2006
  • #2
V8 Mustangs post-1968 went to 3/8" so no worries there. A Carter Street-Strip pump at about $60 should do nicely.
 
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-
  • 2
Replies
23
Views
600
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Jul 5, 2026
Ryu
M
01 mustang 3.8 fuel pressure issue
  • Mhaley2006
  • May 29, 2026
  • 1996 - 2004 SN95 Mustang -General/Talk-
Replies
0
Views
170
1996 - 2004 SN95 Mustang -General/Talk- May 29, 2026
Mhaley2006
M
C
98 gt fuel pressure issues
  • chasecollier1984
  • Jun 2, 2026
  • SN95 4.6L Mustang Tech
Replies
0
Views
93
SN95 4.6L Mustang Tech Jun 2, 2026
chasecollier1984
C
F
2004 Mustang GT – Fuel Pump Not Priming
  • Fayio
  • Apr 22, 2026
  • SN95 4.6L Mustang Tech
Replies
7
Views
319
SN95 4.6L Mustang Tech Apr 27, 2026
n0v8or
N
A
Fuel Capable fuel system for +600hp
  • Avia.tuned
  • Feb 24, 2026
  • SN95 4.6L Mustang Tech
Replies
1
Views
108
SN95 4.6L Mustang Tech Feb 24, 2026
squeak93
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1965 - 1973 Classic Mustangs -General/Talk-
  • Classic Mustang Specific 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?