Sti Turbo Upgrade
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This is a discussion on Sti Turbo Upgrade within the Engine Modifications forums, part of the Tech & Modifying & General Repairs category; i have a 2002 subaru wagon outback, i work as a technician at aldermans chevy and due an extensize amount ...

  1. #1
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    Sti Turbo Upgrade

    i have a 2002 subaru wagon outback, i work as a technician at aldermans chevy and due an extensize amount of work on the turbo diesels there. I have an sti turbo and top mount intercooler, my question is what else do i need to modify or fabricate to make this turbo upgrade work. I'm aiming for 250+ power, whats the best way to get there

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  3. #2
    Subaru Newb MainFrame's Avatar
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    So you have an outback, not a WRX? If so, you will pretty much need a new engine, all new wiring, new ECU, new exhaust, etc. The N/A 2.5L that comes in the Outback is not designed for boost, and neither is the computer it uses.


    It would be cheaper, easier, and MUCH more reliable for you to just sell the Outback and buy a STi..

  4. #3
    Luke Skywalker Mikie13's Avatar
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    ^This.


    You're looking at WAAAAAAAAAAAY much more work. At any rate, the least you will need is a new engine designed to handle that boost. The compression ratio of that engine will be much too high to work with the boost that the VF39 puts out. Thing will go pop in no time. The least you will need would be a full WRX engine swap, including everything that Robin said above. You're better off swapping cars instead of a turbo.
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