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Fuel Fuel Pump upgrade on mild 5.0L

  • Thread starter Thread starter breth3
  • Start date Start date Dec 5, 2020
  • Tags Tags
    1990 mustang 5.0 lx 5.0 fox aeromotive fuel lines fuel pump sve

breth3

Member
Aug 6, 2020
14
3
13
Detroit
Dec 5, 2020
#1
  • Dec 5, 2020
  • #1
Hey guys,

I need to replace the rusty fuel lines on my 1990 5.0L notch. SVE makes a decent fuel line/system upgrade kit. The kit has 3/8" delivery lines and stock return lines and it comes with a 340 LPH Aeromotive fuel pump which supports gas/E85. I have a BBK adjustable fuel pump regulator on the rails.

My question is if I upgrade my car with this kit is the 340 lph pump too big? I plan on building a 408w in the future and that will be swapped in. For the time being though, is a 340 lph ok on a mild 5.0L?


SVE Mustang High Performance Fuel Line Kit w/ Fuel Pump (86-93)

Use this SVE high performance fuel line kit to get your 1986-1993 Mustang motor the fuel it needs!
lmr.com
 

Dan02gt

mazing how much gas smell came from that tiny hole
20+ Year Stangneter
Mar 2, 2003
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Greenville, NC
Dec 5, 2020
#2
  • Dec 5, 2020
  • #2
I wouldn’t get that kit. The stock 1/4” return line it really not large enough for a 340 lph pump. Pro M makes a upgraded fuel pump hanger that allows the use of a 3/8” return line for dealing with all the fuel that large of a pump returns. Check it out here:

High Flow Fuel Pump Hanger for 1986 – 1997 Mustangs

Pro-M Racing High Flow Fuel Pump Hanger for 1986 – 1997 Mustangs! Finally, a real solution to the Mustang fuel pump hanger problem! The aftermarket has been selling high volume fuel pumps for Mustangs for many years. But until now, no one has addressed the other half of the problem... The 1/4”...
www.promracing.com
 
Reactions: General karthief

Decipha

Active Member
Aug 22, 2007
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New Orleans, LA
Dec 5, 2020
#3
  • Dec 5, 2020
  • #3
genera rule of thumb is your return should be the same size as your feed if they are the same length

all the fuel systems i do i mount the regulator next to the tank so the return line is very short. But that requires an aftermarket regulator.
 
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