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05-02-2013, 10:28 AM | #1 |
Scooby Newbie
Member#: 150696
Join Date: Jun 2007
Chapter/Region:
South East
Location: Miami
Vehicle:2005 WRX white |
correct fuel pressure??
so looks like someone messed around with fuel pressure regulator when doing my clutch job,because it was at 20 lbs @ idle and running like crap.i cant localize my tuner,but i'm pretty sure he had the fuel pressure in the 40's almost to 50 area.i moved it up to 45 psi @ idle,car runs and feels great since i moved it.I'm running 650cc injectors,255 walbro and a big 16g with meth injection. Car made 330whp/330trq.
what should my fuel pressure be at? thanks nasioc
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05-02-2013, 12:53 PM | #2 |
Scooby Specialist
Member#: 131432
Join Date: Nov 2006
Chapter/Region:
Tri-State
Location: Lehigh Valley PA
Vehicle:2004 WRX on Ignite E Gtx3076 - 07 6mt |
Base pressure on a stock system is 43psi with oem fpr, you should be fine at 45, as thats not too much of a jump.
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05-02-2013, 02:25 PM | #3 |
Scooby Guru
Member#: 32669
Join Date: Feb 2003
Chapter/Region:
SCIC
Location: Woodland Hills
Vehicle:2007 2.34LR, EFR7670 LINK G4+ hybrid STi |
Do you know how to set base fuel pressure? Base is 43 psi but you won't read 43 at idle. If you do you set it wrong.
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05-02-2013, 03:41 PM | #4 |
Scooby Guru
Member#: 4414
Join Date: Feb 2001
Location: Dublin, CA
Vehicle:2002 WRX Sedan Midnight Black |
Fuel pressure is referenced to the intake manifold. Idle fuel pressure will be much closer to 35 psi than 45psi.
The best way to set an aftermarket FPR is to pull the reference line from the intake manifold and adjust until it's ~43psi (or your desired fuel pressure)... then put the reference line back. If your tuner tuned with a different fuel pressure than stock, you need to find out what fuel pressure that was. Like now. |
05-02-2013, 04:53 PM | #5 |
Scooby Guru
Member#: 32669
Join Date: Feb 2003
Chapter/Region:
SCIC
Location: Woodland Hills
Vehicle:2007 2.34LR, EFR7670 LINK G4+ hybrid STi |
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05-02-2013, 08:29 PM | #6 |
Scooby Specialist
Member#: 239162
Join Date: Feb 2010
Chapter/Region:
BAIC
Location: Sacramento, CA
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stock fuel pump kinda sucks
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05-03-2013, 01:38 PM | #7 |
Scooby Newbie
Member#: 150696
Join Date: Jun 2007
Chapter/Region:
South East
Location: Miami
Vehicle:2005 WRX white |
ok,gonna try to find out then,but if i cant then what should i set it to??
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05-03-2013, 02:29 PM | #8 |
Scooby Guru
Member#: 32669
Join Date: Feb 2003
Chapter/Region:
SCIC
Location: Woodland Hills
Vehicle:2007 2.34LR, EFR7670 LINK G4+ hybrid STi |
43 psi is the default base fuel pressure.
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05-03-2013, 06:47 PM | #9 |
Scooby Specialist
Member#: 13530
Join Date: Dec 2001
Chapter/Region:
NWIC
Location: Cascadia
Vehicle:EA63 , EA81T, EJ20G, EJ205 |
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