Need advice!!
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This is a discussion on Need advice!! within the Engine Modifications forums, part of the Tech & Modifying & General Repairs category; I currently have a 2011 WRX with catless down pipe, vf52, catback exhaust, AEM CAI, and tuned. I wanna push ...

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    Registered User 11wrxCO's Avatar
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    Need advice!!

    I currently have a 2011 WRX with catless down pipe, vf52, catback exhaust, AEM CAI, and tuned. I wanna push 300whp sticking with the Vf52. I was gonna upgrade to fmic or TMIC, 800cc injectors, fuel pump, and run E85, would it be possible to achieve 300whp?

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    The Jedi Ninja TownLine500's Avatar
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    It depends on the dyno.
    Mine is rated at 291whp, but that can vary.
    You have a solid plan, but let me make a couple suggestions.
    Get a Process West TMIC or the Verticooler TMIC.
    ID 1000s are the popular choice for injectors. Those are what my tuner recomended.
    The DW65 fuel pump is also very popular, and used by a lot of our members.
    Adding an external wastegate will also be beneficial to you.
    I would also do the headers, Killer B makes an awesome product.
    Once your done you will also need a retune. It's probably worth your while to have an E85 tune and a pump gas tune. I stick to 93 pump gas preferably Shell, this is a personal preference. We don't have E85 near where I live.

    Also upgrading bushings and brakes will also make sense for your build. Stainless steel lines are a smart investment. And change over to dot 4 brake fluid.
    If you don't have them already, upgrade your swaybars and endlinks. This will give you a well balanced upgrade.
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    Registered User 11wrxCO's Avatar
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    Thank you for the advice. Im trying to build on a budget lol. I would rather prefer to go fmic consider I plan on doing 18g turbo. But I do know a TMIC is better with a vf52. And I have E85 everywhere here in Colorado. But I was also told that doing 850cc injectors is worthless with a vf52 is this true?

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    The Jedi Ninja TownLine500's Avatar
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    I haven't heard that, though I do know mutch about the 850cc.
    Keep in mind that a FMIC has a lot more plumbing.
    That will affect it's spool time.
    Is this your daily driver?
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    MAINEiac 11blackSTi's Avatar
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    Quote Originally Posted by 11wrxCO View Post
    I currently have a 2011 WRX with catless down pipe, vf52, catback exhaust, AEM CAI, and tuned. I wanna push 300whp sticking with the Vf52. I was gonna upgrade to fmic or TMIC, 800cc injectors, fuel pump, and run E85, would it be possible to achieve 300whp?
    You'll definitely want something bigger than 800cc injectors if you are going to be running E85. As suggested, 1000cc at least. You can run safer with E85 due to the high octane, so you can push a more aggressive tune. I like the suggestions of the equal length headers, TMIC and EWG as suggested. No need for a front mount on the stock turbo set up. Running a more aggressive tune, you will want to consider getting a replacement by pass valve (such tail or forge fully recirculating). You shouldn't have a problem hitting 300 WHP properly set up on the stock turbo with E85.

    Might want to consider some braking, suspension mods as well to compliment the power.

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    Village Idiot McBill's Avatar
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    Here is my suggestion:

    New TMIC
    new BPV
    1000cc Injectors, at minimum (for the e85)
    Fuel pump
    you already have the intake
    you already have the downpipe
    EWG
    new up pipe to fit your EWG
    equal length header
    and a new 3 port electronic boost control solenoid

    300whp is easily achievable with the stock turbo and this list will probably put you right around 320whp and 350ft-lbs of torque. EDIT: 320 and 350 on pump fuel. on e85 you should be able to do well over those numbers.
    Last edited by McBill; 02-11-2015 at 07:28 AM.
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    Registered User 11wrxCO's Avatar
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    This is my daily driver so I wanna be able to switch back and forth from e85 to 91. And McBill I might go that rought.

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    Village Idiot McBill's Avatar
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    Quote Originally Posted by 11wrxCO View Post
    This is my daily driver so I wanna be able to switch back and forth from e85 to 91. And McBill I might go that rought.
    Switching back and forth may not be that easy unless you have an SI drive, which you don't. Plus you'd have to purge the tank every time you wanted to switch from e85 to 91. But that can be solved with the installation of a purge valve somewhere in your fuel line. You could see if your tuner would be willing to do two separate maps and let you keep one on your AP to reflash to the computer when you wanted to switch, but a tuner may be reluctant to do this. Having said all of that, I would say pick one and stick to it.
    Last edited by McBill; 02-11-2015 at 07:33 AM.
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    zax
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    There are ways to use flexfuel and ethanol scaling, Bill.

    Most options require a piggyback ECU management system with ECA input for scaling timing and fueling.
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    Village Idiot McBill's Avatar
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    Quote Originally Posted by zax View Post
    There are ways to use flexfuel and ethanol scaling, Bill.

    Most options require a piggyback ECU management system with ECA input for scaling timing and fueling.
    Interesting. Is there a way to easily do it with the AP? Also, what about switching fuel. could you just go nearly empty on one and fill up the tank with another? Most of the people I've seen switch have some sort of way to drain the tank completely.
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    OMG WTF MainFrame's Avatar
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    Quote Originally Posted by McBill View Post
    Is there a way to easily do it with the AP? Also, what about switching fuel. could you just go nearly empty on one and fill up the tank with another? Most of the people I've seen switch have some sort of way to drain the tank completely.

    Cobb is working on flex fuel support for the AP.. last I saw Lance said they're close (at least for GR models.. unfortunately for some of us they haven't decided whether or not to work on it for 16-bit ECUs yet).


    You can just run it down to almost empty before switching.. that's what most people do, but that can also get you in trouble if you don't run it down enough. Ethanol is pretty forgiving detonation wise. If you're tuned for e85, you have two gallons of e10 91 octane left in the tank, and fill up with e85 that's still around 75% ethanol.. which is higher than some winter blends, and should be okay as long as the tune isn't supper aggressive. It will run richer with less ethanol, so that helps as well. Switching the other way may not be as forgiving, since running two gallons of e85 on a 91 octane tune will lean out AFRs.. but at the same time the additional ethanol should provide some detonation resistance, and one would hope a 91 octane map is already pretty conservative on the timing.

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    OMG WTF MainFrame's Avatar
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    Quote Originally Posted by 11wrxCO View Post
    I would rather prefer to go fmic consider I plan on doing 18g turbo.

    An 18g is hardly bigger than a vf52.. people run turbos twice that size with a TMIC and it's fine. BUT, if peak power and drag times are what you're after, FMIC may be the better choice.

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    Registered User 11wrxCO's Avatar
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    So its isn't a good idea to run straight E85?

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    zax
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    Quote Originally Posted by 11wrxCO View Post
    So its isn't a good idea to run straight E85?
    Where on earth did you get this?


    I ran a TMIC with an 18G for a long time
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    What is a good BPV?

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