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Author
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Topic: Fuel Pressure?
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Wildfire532FB
CAFords OG
Member # 1482
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posted
 
 
I forgot how much PSI the fuel pressure is supposed to be at for a 5.0L when the vaccuum is disconnected? I could check the Jeeps but its out of gas ![[Frown]](frown.gif)
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68 Fastback
84 CJ7
94 HMMWV
95 GT
03 F350
17 Fusion Hybrid
Posts: 17578 | From: 530 | Registered: Jun 2002
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mtbaughs
Road Racer
Member # 4052
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posted
40 psi
Posts: 2019 | From: Boise, Idaho | Registered: Jan 2004
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Wildfire532FB
CAFords OG
Member # 1482
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posted
ok thats what i thought and thats where i set it at.
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68 Fastback
84 CJ7
94 HMMWV
95 GT
03 F350
17 Fusion Hybrid
Posts: 17578 | From: 530 | Registered: Jun 2002
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Jeff S
¯
Member # 371
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posted
FWIW the pressure that fuel injectors are rated at is 43.5psi.
[ April 11, 2004, 03:51 PM: Message edited by: Jeff S ]
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'90 Mustang LX: 8.53 @ 157.92 w/ 1.33 60' on DR's
'10 ZR1: FOR SALE
'14 E63 S: RENNtech ECU
'04 Gallardo: UGR TTG
Posts: 2121 | From: San Jose, CA | Registered: Aug 2001
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Wildfire532FB
CAFords OG
Member # 1482
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posted
so i could techniquely run them up to 43psi then, cool.
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./_ _ _ ___ __\
(]]]_ _ o _ _[[[)
|\_o_ __ __o_/|
|__|..........|__|
68 Fastback
84 CJ7
94 HMMWV
95 GT
03 F350
17 Fusion Hybrid
Posts: 17578 | From: 530 | Registered: Jun 2002
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Jeff S
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Member # 371
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posted
quote:
Originally posted by Cobra5.0Feep:
so i could techniquely run them up to 43psi then, cool.
Actually what I meant is that at 43.5psi a 42# injector will flow 42lb/hr. At a lower pressure it will flow less and at a higher pressure it will flow more. You can typically run injectors up to 65+psi without issue.
To calculate what an injector wil flow at a pressure different than 43.5psi you need to use the following formula:
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'90 Mustang LX: 8.53 @ 157.92 w/ 1.33 60' on DR's
'10 ZR1: FOR SALE
'14 E63 S: RENNtech ECU
'04 Gallardo: UGR TTG
Posts: 2121 | From: San Jose, CA | Registered: Aug 2001
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