STFT -25 now +25 WTF? - Page 3

Clark Turner · 10-22-2012, 10:09 PM

You can rent a gauge from Vatozone for free. Just need a deposit. Hook it up and set pressure. I guess thats what you are asking. Most of the time, I run 45 psi and then hook up the line. If I need more pressure and run out of injector, I might run 50. A single walbro wont support big boost which translates into big fuel pressure on top of the high base pressure. They will hit 65 yo 70 peak and then fall. So if you are at 50 thats 20 psi. Past that, You have to use IDC to make up the lack of pressure/flow.

C

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spoolinsti05 · 10-23-2012, 12:12 AM

Quote:

Originally Posted by Clark Turner

You can rent a gauge from Vatozone for free. Just need a deposit. Hook it up and set pressure. I guess thats what you are asking. Most of the time, I run 45 psi and then hook up the line. If I need more pressure and run out of injector, I might run 50. A single walbro wont support big boost which translates into big fuel pressure on top of the high base pressure. They will hit 65 yo 70 peak and then fall. So if you are at 50 thats 20 psi. Past that, You have to use IDC to make up the lack of pressure/flow.

C

Ok makes sense I'm gonna pull the pump out and inspect my fuel filter make sure it's not cracked somehow. Then mod my walbro255 for now by closing the pressure relief valve until i can get the walbro450 and install it for the re tune. And I'm actually using a snap-on oil pressure gauge that comes in a test kit. I'm running 42psi base id2000 inj. so 21psi boost It should be around 63-65psi when it get's in this range on the gauge psi start's to bounce back and forth around 50-60psi and just's jump's back and forth during a pull. I just wanted to try and solve this before my retune.

I know it can be one or some of these issues.

Fuel pump (old)
Fuel filter (old)
Voltage ? didn't check assume it's good.
FPR witch is new aeromotive compact efi

spoolinsti05 · 10-31-2012, 08:39 PM

Ok well probably didn't help that my sti radiator cap was shot. Thank god it was free compliments of 5 star subaru in Oneonta. But I'll stick with the normal pressure

My car actually warm's up in a decent time now.

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10-22-2012, 10:09 PM	#51
Clark Turner NASIOC Vendor Member#: 178047 Join Date: Apr 2008 Chapter/Region: SWIC Location: AZ/Vegas Vehicle: 02 WRX STI Spec C Black	You can rent a gauge from Vatozone for free. Just need a deposit. Hook it up and set pressure. I guess thats what you are asking. Most of the time, I run 45 psi and then hook up the line. If I need more pressure and run out of injector, I might run 50. A single walbro wont support big boost which translates into big fuel pressure on top of the high base pressure. They will hit 65 yo 70 peak and then fall. So if you are at 50 thats 20 psi. Past that, You have to use IDC to make up the lack of pressure/flow. C * Registered users of the site do not see these ads.

10-31-2012, 08:39 PM	#53
spoolinsti05 Scooby Specialist Member#: 108051 Join Date: Feb 2006 Chapter/Region: Tri-State Location: NY Vehicle: 2005 TickingTimeBomb Jr tuned TT Sleeved	Ok well probably didn't help that my sti radiator cap was shot. Thank god it was free compliments of 5 star subaru in Oneonta. But I'll stick with the normal pressure My car actually warm's up in a decent time now.