Walbro 255 fuel pump - Subaru WRX Forum
 
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post #1 of 8 Old 06-02-2011, 09:00 AM Thread Starter
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Walbro 255 fuel pump

If installing a Walbro 255 fuel pump will I be ok using the 440cc stock injectors?
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post #2 of 8 Old 06-02-2011, 09:52 AM
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probably not man. i would at least jump to sti pinks. a little more detail on the other mods would be good to know. stock turbo? stock IC? you have a turboback im assuming?


ps. i have stock injectors in mine and just with the stock pump running a stage 2 ots map i see mid 90s on my IDCs so that pump put on a car even like mine with pretty basic mods and i wouldnt be doing myself any favors. just maxing my injectors.

Kevin.
Cobb ap stage 2 ots, catless uppipe, catless turboback, Cobb Sf intake.

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post #3 of 8 Old 06-02-2011, 10:03 AM
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I think he asked if he installs a walbro, would his injectors/fuel system be ok. <--- Yes if so.

But Kevin is right if you are installing other shtuff.

Paul
2002 WRX Sold
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post #4 of 8 Old 06-02-2011, 10:29 AM
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^Yep, fuel pump has no effect on how much fuel comes out of the injectors. A bigger pump can just run more fuel to the injectors, and whatever they don't use (ECU controlled) just gets returned to the fuel tank through the fuel pressure regulator.

-Chris
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post #5 of 8 Old 06-02-2011, 10:57 AM Thread Starter
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The upgrades are apexi cat back exhaust, turbo xs fmic, turbo xs boost controller, aem intake, apexi afc. I am planning on putting putting sti pink injectors in within the next two months, just after installing the fmic the car is running lean so i've had to up the fuel using the afc, and was hoping the 255 pump would be enuff to hold me over til I get the sti pinks.
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post #6 of 8 Old 06-02-2011, 11:53 AM Thread Starter
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The upgrades are apexi cat back exhaust, turbo xs fmic, turbo xs boost controller, aem intake, apexi afc. I am planning on putting putting sti pink injectors in within the next two months, just after installing the fmic the car is running lean so i've had to up the fuel using the afc, and was hoping the 255 pump would be enuff to hold me over til I get the sti pinks.
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post #7 of 8 Old 06-02-2011, 12:04 PM
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For my power and IDC my stocks are doing ok at 565cc and 94%. I do have a pump and I think it's helping because I've seen stage 2 tunes as high as 110%.

Scott-2011 WRX 335HP 394TQ 93 VF52!
http://www.wrxtuners.com/forums/f121/2011-wrx-build-31226/
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post #8 of 8 Old 06-02-2011, 11:16 PM
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My injectors were over 100% before I upgraded to the new turbo and injectors. My tuner said it'd be ok as long as they don't stay that way forever because it will shorten the life span of the injectors because they will be over worked.

Kirt
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"When in doubt...flat out" - Colin McRae
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