Turbo Supporting Mods
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This is a discussion on Turbo Supporting Mods within the Engine Modifications forums, part of the Tech & Modifying & General Repairs category; So I'm thinking my next step in WRX modification will be a bigger turbocharger. Now my questions about supporting mods ...

  1. #1
    Registered User AlexWRX06's Avatar
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    Turbo Supporting Mods

    So I'm thinking my next step in WRX modification will be a bigger turbocharger. Now my questions about supporting mods begin. I'm thinking of upgrading to the vh39(?) so my mods would include 600cc injectors, an STi intercooler takeoff or Godspeed, and a Walbro fuel pump. What's everyone's opinions of those mods? I'm stage 2 right now so I have a 3'' turboback, tune, and intake (i know that's not needed). Also going to heat wrap my downpipe because I hear that's good.

    Any and all constructive advice welcome. Thanks!
    2006 Subaru Impreza WRX
    Obsidian Black Pearl
    CAI, Invidia Turboback, Cobb Accessport, Dipped OEM wheels, Rally Armor mud flaps, chin spoiler, HID headlights, and various other things.

    Love that boxer sound

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  3. #2
    Subaru Newb MainFrame's Avatar
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    I think you mean a used vf39?


    STi intercooler isn't much better than stock.. and Godspeed is worse than stock. The cheapest TMIC I would consider is the TurboXS unit, but make sure you get a genuine one, not a knock off (like the Godspeed). Process West makes an excellent TMIC that comes with the necessary splitter.

    What 600cc injectors are you thinking about getting?



    Along with those things, I would get a 3-port EBCS, and obviously you're going to need a professional tune immediately upon installing the parts.

  4. #3
    Registered User AlexWRX06's Avatar
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    Yes that is what I meant thanks. It will be a good while before I get all of that purchased and added but between now and then I'm studying up big time. Thanks for the intercooler advice and I was looking at a set of injectors from rallysportdirect and the brand is escaping me right now. Trying to draw out a budget right now so I can get a plan rolling. Would you suggest putting all of that on including the turbocharger at one time? Save tuning cost I assume.
    2006 Subaru Impreza WRX
    Obsidian Black Pearl
    CAI, Invidia Turboback, Cobb Accessport, Dipped OEM wheels, Rally Armor mud flaps, chin spoiler, HID headlights, and various other things.

    Love that boxer sound

  5. #4
    Registered User wreckingball man's Avatar
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    Cobb has a vf39 map. That would dictate you injector choice or if you get a pro-tune ask the tuner what injector size they would recommend/be comfortable tuning with. An ebcs 3 port would be a good idea along with a mbc, ask your tuner about their preference with these items too. Instead of wrapping the downpipe it might be more beneficial to wrap the headers/up-pipe instead. Or ceramic coat them.

  6. #5
    Subaru Newb MainFrame's Avatar
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    Quote Originally Posted by wreckingball man View Post
    Cobb has a vf39 map. That would dictate you injector choice or if you get a pro-tune ask the tuner what injector size they would recommend/be comfortable tuning with. An ebcs 3 port would be a good idea along with a mbc, ask your tuner about their preference with these items too. Instead of wrapping the downpipe it might be more beneficial to wrap the headers/up-pipe instead. Or ceramic coat them.


    I wouldn't use an OTS map for a turbo swap, but I guess some people do.


    It would be best to wrap headers, uppipe, AND downpipe.. and get a turbo blanket.

  7. #6
    Registered User AlexWRX06's Avatar
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    Thanks guys. Turbo blanket and downpipe wrap will be soon. When I get a little more time I will do the uppipe and headers.
    2006 Subaru Impreza WRX
    Obsidian Black Pearl
    CAI, Invidia Turboback, Cobb Accessport, Dipped OEM wheels, Rally Armor mud flaps, chin spoiler, HID headlights, and various other things.

    Love that boxer sound

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