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This is a discussion on Goal : 300whp and keep it safe for daily driving! within the Engine Modifications forums, part of the Tech & Modifying & General Repairs category; Originally Posted by T0rque you will NOT see 300hp out of the stock intercooler and BPV. You may on a ...

  1. #16
    zax
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    Quote Originally Posted by T0rque View Post
    you will NOT see 300hp out of the stock intercooler and BPV. You may on a higher reading dyno with injectors and a fuel pump but your pushing the limit of the stock tmic and bpv. Even at stage 2 levels most are close to max on injectors and bpv.
    Ah yes Bo has a point... the BPV will likely become an issue at this point.
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  3. #17
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    Quote Originally Posted by teflon_jones View Post
    Don't you max out the stock injectors before the fuel pump?
    Not from what I've seen in various datalogs from not only my own 2010 but others from 09-11. The fuel pump runs out of steam far before the turbo/injectors do. The injectors probably should be upgraded but why do that and not change the fuel pump? If fuel delivery isnt up to the task the first thing to increase is fuel delivery to the injector. The only reason to upgrade an injector is because over 80% duty cycle they become harder and harder to properly regulate. Not what you want at umptysquat rpm under boost.
    I agree tq is definitely more attainable and useful, but I'd like to see a dyno graph of a 300 whp WRX with only a TBE and tune.
    haha.. search.. they're out there. I'm thinking most I've seen also have the intake done but really that's just semantics. A good tuner can pull quite a bit out of the later cars. Problem I see is that to do that they need to stretch the tune to the point of having very little overhead if something should go wrong. Personally I'd be more comfortable at 280hp/300tq vs attempting to push further. Its far safer in that range on the factory turbo/injectors.

    If you consider a high reading Mustang a reputable dyno then I'm sure you can find a number of them.....
    last one I saw in person was a 2011 sedan on a dynapack reading over 320hp/330tq and had the torque coming on super early with a really nice curve. tbe/tune and drop in filter were the only mods. I was shocked.. but there it was.
    Back in the real world though even with a stage 2 STI (which has a bigger turbo, IC and injectors) it's very hard to get 300 whp.
    The turbo output and efficiency on the STI and WRX from 09 to 12 are exactly the same. The only difference between the vf48 and vf52 is the flange on the compressor housing for the 52 vs no flange for the 48. The intercooler makes a marginal difference unless one goes aftermarket.

    Same turbo.. same injectors... difference in the STI is the ability to tune exhaust cam timing. Which again is leading to huge gains and much broader powerbands.
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  4. #18
    Subie Enthusiast SWPSubie's Avatar
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    Here is a great article about mods.. crawford knows thier shyt and its all around good knowledge

    The Truth Behind The Subaru EJ-Series Engines - Tech-Knowledge - Import Tuner Magazine

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    Administrator RayfieldsWRX's Avatar
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    Quote Originally Posted by teflon_jones View Post
    If you consider a high reading Mustang a reputable dyno then I'm sure you can find a number of them.....
    High reading Mustang? Has the world changed since I got tuned...they were always the low-readers before...:bill:
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    zax
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    Quote Originally Posted by mangostick View Post
    difference in the STI is the ability to tune exhaust cam timing. Which again is leading to huge gains and much broader powerbands.
    To be fair here, Shawn, we're talking about peak horsepower. Normal cam profile already has a fair amount of valve overlap, so the main gains are not in peak power, but ABSOLUTELY in a broader power-band.
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    Master Baiter EJ257's Avatar
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    Quote Originally Posted by RayfieldsWRX
    High reading Mustang? Has the world changed since I got tuned...they were always the low-readers before...:bill:
    You can alter the CF to make it read higher. This is common because people get hung up on the final numbers rather than area under the curve and HP/TQ deltas
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    zax
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    To be honest, I rarely trust a single article published by Import Tuner, but that article is RELATIVELY informative. I just wish that Import Tuner had chosen more respected engine builders (Like MPS) for the article, except of course Crawford Performance.
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    Quote Originally Posted by zax View Post
    To be honest, I rarely trust a single article published by Import Tuner, but that article is RELATIVELY informative. I just wish that Import Tuner had chosen more respected engine builders (Like MPS) for the article, except of course Crawford Performance.
    Not a huge Import Tuner fan myself...but was going by the article..Crawford is a pretty reputible company when it comes to the Subaru. i liked the information given at hand. wasn't AS misleading as most articles.. just some good knowledge for beginner to advanced owner mods. and a lil need to know. i just hate seeing so may people throwing on turboback exhausts and intakes, and then wondering why they are not getting anything from it except a check engine light. Tuning is important when it comes to the subaru turbo family.

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    Registered User cjm1991's Avatar
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    Quote Originally Posted by RayfieldsWRX View Post
    High reading Mustang? Has the world changed since I got tuned...they were always the low-readers before...:bill:
    Your correct Ray, 90% of mustang dynes give lower, more realistic numbers. I think he was implying the tuner purposely made his read a tad higher.
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  12. #26
    zax
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    OP, FYR, this was the link that was posted earlier:

    The Truth Behind The Subaru EJ-Series Engines - Tech-Knowledge - Import Tuner Magazine

    It's a decent article, though as is the case with all of Import Tuner's articles, take it with a grain of salt.
    2015 CWP WRX STi ... But how did I get roped back into an EJ motor?!
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    I made 300whp/330tq on just Invidia N1 cat less tbe cobb SF intake and ebcs with Protune in my 09 wrx..DynoJet Dyno

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    Quote Originally Posted by maus View Post
    SICK BUMP
    You may want to get that checked out.

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    Quote Originally Posted by Drews View Post
    You may want to get that checked out.
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