turbo upgrade
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This is a discussion on turbo upgrade within the New Member Hangout forums, part of the Community - Meet other Enthusiasts category; I am thinking of upgrading my turbo but i have alot of questions about it. i was looking at the ...

  1. #1
    Registered User abhold87's Avatar
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    turbo upgrade

    I am thinking of upgrading my turbo but i have alot of questions about it. i was looking at the IHI VF34 or the IHI VF43(i think its the VF43 that came out on the 08 or 09 sti). they will help me gain power but not be absolutely huge because its for a daily driver. my questions though are am i goin to have to buy all new engine internals( cams, pistons, etc.) because i have a 02 wrx ej20? and its an automatic so will the transmisson be able to handle more power like that? reading about it i think it said up to 290whp with that turbo

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    Registered User NjBuGeyEdWRX's Avatar
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    the vf 43 is from the 07 STi. you wont need to build your motor or tranny for either turbo. youll need injectors and an STi tmic and maybe a fuel pump depending if ur tuner wants one or not.
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    Registered User abhold87's Avatar
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    with the vf34 or vf39 should i get a stand alone engine management or a piggyback. and do i still need to get a boost controller with a engine management unit. i was lookin into the greddy profec b spec II.

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    Registered User Pactin's Avatar
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    Quote Originally Posted by abhold87 View Post
    with the vf34 or vf39 should i get a stand alone engine management or a piggyback. and do i still need to get a boost controller with a engine management unit. i was lookin into the greddy profec b spec II.
    People tend to go with getting protuned with the stock ecu. Boost controller isn't really necessary either.
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    Registered User Micah's Avatar
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    Quote Originally Posted by NjBuGeyEdWRX View Post
    the vf 43 is from the 07 STi. you wont need to build your motor or tranny for either turbo. youll need injectors and an STi tmic and maybe a fuel pump depending if ur tuner wants one or not.
    +1

    I have and love the vf34. It's a safe amount of power for the stock ej205. You should be able to tune it to around 250-270whp around 18-20psi. I think the auto trans is gonna have higher drivelosses, which is why I'm only guessing in that horsepower range.

    As much as I love my WRX, I'm sometimes jealous of my younger brothers awd dsm with upgraded turbo dog box trans and other goodies. While my car has been much more reliable, his was picked up for a song and when it's running is a good bit faster than my car.

    It makes me think of switching to a bigger turbo, but I'll probably wait until I swap to an ej257. Just figured I would point that out since I think it's a likely feeling for a vf34 owner. Good turbo, spools quick - but is still a relatively smaller turbo despite what a step up it is from the stock td04.
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