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Author Topic: Fuel Prressure questions  (Read 2982 times)

Offline Da67goatman

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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)
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<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 VileZambonie

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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?  ???
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Offline Da67goatman

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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?
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<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

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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.
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