walbro fuel pump
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This is a discussion on walbro fuel pump within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; I have a 2006 wrx i have a vf39, header, uppipe, downpipe, intake, and turbo xs delta would it be ...

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    walbro fuel pump

    I have a 2006 wrx i have a vf39, header, uppipe, downpipe, intake, and turbo xs delta would it be good if i get one, my tuner says i should just have to ask to make sure.

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    Registered User Black X Dahlia's Avatar
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    your going to need bigger injectors for the bigger turbo, and the walbro helps.
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    They told me that my stock injectors are fine for the power i am running and i should get the fuel pump right?

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    Registered User Black X Dahlia's Avatar
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    i believe your car comes stock with 440cc injectors, the STi comes stock with 550cc or so. If you putting in a VF39 you should put 550 inj. It will be too much strain on the 440's. By the way a performance fuel pump only increases the flow of fuel, not the amount being sprayed into the cylinders by the injectors. Talk that over with your mechanic
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    Registered User JMack's Avatar
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    Injectors (STi pinks would be fine, but if you're gonna go for more power get the bigger injectors now) and a 225Lph will suit you fine. The 225Lph pump will last you thru most of what you can throw at that motor.
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    Master Baiter EJ257's Avatar
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    Quote Originally Posted by Black X Dahlia
    i believe your car comes stock with 440cc injectors, the STi comes stock with 550cc or so. If you putting in a VF39 you should put 550 inj. It will be too much strain on the 440's. By the way a performance fuel pump only increases the flow of fuel, not the amount being sprayed into the cylinders by the injectors. Talk that over with your mechanic
    Wrong. 2.5L come with blue injectors which flow ~ the same as STi ones.

    You'll be fine with the stock injectors, but you should get a Walbro - <$100 insurance.
    2005 WRX STi (Mods | Virtual Dyno)

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    Registered User Truckster27's Avatar
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    Agreed. You should probably get the Fuel Pump as insurance, but do not need to upgrade the injectors in a 2006 wrx. They upgraded the injectors to a side-mount injector. (I don't even know if the 2005-earlier "pink" sti injectors will work in a 2.5 wrx, never really researched it, but wouldn't think so). The wrx's that are 2005 and earlier are a 2.0L motor, and would required bigger injectors then the stock ones provided. How do i know? I Have 2 wrx's:

    -a 2006 with an STi TMIC, Turboxs stealthback into a prodrive oval-tip axleback, STi turbo (vf-39) and warblo fuel pump.

    -a 2004 with a FMIC, Garret turbo (18G), D-Works injectors, warblo fuel pump, Cobb UP, and Turbo-Back exhaust.

    Both run on Cobb AP version II tunes. I've no fuel-related issues thus far.

    Movn' on up to an '06 WRX
    Vf-39 all the way!

    Love to build 'em, just to ship 'em out and start all over!

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    Master Baiter EJ257's Avatar
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    Quote Originally Posted by Truckster27
    (I don't even know if the 2005-earlier "pink" sti injectors will work in a 2.5 wrx, never really researched it, but wouldn't think so)
    The only STi injectors that would work in a WRX would be those from '07, because they're top-feed ('02-'07 WRX utilize top-feed).
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    Registered User Black X Dahlia's Avatar
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    Quote Originally Posted by idipskoalmint View Post
    Wrong. 2.5L come with blue injectors which flow ~ the same as STi ones.

    You'll be fine with the stock injectors, but you should get a Walbro - <$100 insurance.
    Oh i thought he had an 02 Rex for some reason, thx for the fix idipskoalmint
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