« previous next »
Pages: [1]   Go Down

Author Topic: Fuel Prressure questions  (Read 2853 times)

Offline Da67goatman

  • Site Supporters
  • Junior Member
  • ******
  • Posts: 758
  • Burban
Fuel Prressure questions
« on: November 02, 2010, 09:36:30 pm »
Where is the factory fuel pressure regulator?  What is proper pressure for a tbi 350?  Why would the factory put 3/8" fuel lines on my 350 TBI?  These are the things i need help with.  Thanks for your assistance.  (pictures help I'm a visual learner)
Logged
<Pitcrew>
1989 R2500 Suburban mild 350 TBI 700r4 10.5" 14bolt 4.10 w/ 33s
1992 fullsize Blazer 4x4  35s no lift, 4.10s, Hella driving lights, TJ Flares, Huge bumpers, Snorkel, custom interior

Online VileZambonie

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 19182
Re: Fuel Prressure questions
« Reply #1 on: November 02, 2010, 10:58:31 pm »
It's in the tbi unit. 13psi is ideal. Why wouldn't they use a 3/8" line?  ???
Logged
,                           ___ 
                         /  _ _ _\_
              ⌠ŻŻŻŻŻ'   [☼===☼]
              `()_);-;()_)--o--)_)

74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline Da67goatman

  • Site Supporters
  • Junior Member
  • ******
  • Posts: 758
  • Burban
Re: Fuel Prressure questions
« Reply #2 on: November 03, 2010, 06:04:10 pm »
It just seems large for the small output of the throttle body.  Can I remove that diaphragm and just use an aftermarket adjustable regulator?
Logged
<Pitcrew>
1989 R2500 Suburban mild 350 TBI 700r4 10.5" 14bolt 4.10 w/ 33s
1992 fullsize Blazer 4x4  35s no lift, 4.10s, Hella driving lights, TJ Flares, Huge bumpers, Snorkel, custom interior

Offline TexasRed

  • Junior Member
  • ***
  • Posts: 727
Re: Fuel Prressure questions
« Reply #3 on: November 03, 2010, 10:51:03 pm »
TBI is fairly low pressure fuel injection. There's a difference between pressure and volume. Close off some of a water hose, the pressure shoots up but the volume goes down.
Logged
Pages: [1]   Go Up
« previous next »