2.5 subaru, what size turbo for aircraft use?

Discussion in 'Subaru' started by slociviccoupe, Jan 10, 2012.

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  1. Jan 10, 2012 #1

    slociviccoupe

    slociviccoupe

    slociviccoupe

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    So everyone knows that the stock subaru automotive turbo is inadequate of the continuous duty use in an aircraft, but what size compressor, turbine, and what ar housings would be suited for a 2.5 subaru? Ive read everything from a 60-1 from garrett or precision, to the gt28rs, the gt35r, the gt42, and a few others. Noticed few have used turbonetics turbo's i prefer to stay away from them as they are unreliable and not a true dual ball bearing turbo. Most likely going to stick to garrett, airesearch, precision, or borg warner.
    things like stainless steel exhaust housings, water/oil cooled center cartridges, billet compressor wheels, and inconel exhaust wheels. there should be a turbo that will be sized correctly for aircraft use. I can look at compressor maps and size one but i don't know what altitude and lower density air does and how it affects the compressor map.

    here is the last honda my friend david and I built making some really good hp. turbo is a borg warner sc372. 72mm compressor on a 2.0 liter honda @35 psi of boost. Tuned by CMB tuning out of central florida.
    http://www.youtube.com/watch?v=CjMBolbo1UA
    I know how to make good power with boost and fuel, but now have to learn and scale it back for continuous duty and for altitude correction.


    just in need of some insight and hopefully get the sizing of the turbo right for an ej25 sohc subaru. and about only 10psi of boost for takeoff and boost in cruise at altitude for compensation. boost will be regulated by an electronic boost controller through the ecu and an external wastegate.
     
  2. Mar 8, 2012 #2

    dirk_D

    dirk_D

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    These motors are pretty good stock, trim of all the fat (iron brackets), lighten it up, after market ecu.
     
  3. Feb 12, 2017 #3

    MacPara

    MacPara

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    Did you ever solve this problem? I am around the same stage in determining what would be a good turbo for this continuous, light boost application with the very same 2.5l/SOHC EJ257 configuration.
     
  4. Feb 12, 2017 #4

    rv6ejguy

    rv6ejguy

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    We've used a Garrett TO4E, -50 compressor trim, Stage 3 T3 turbine with .82 A/R, integral wastegate on 3 different turbo Subes. All worked very well.
     
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  5. Feb 13, 2017 #5

    mcrae0104

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    Is there a SOHC version of the EJ257?
     
  6. Feb 13, 2017 #6

    rv6ejguy

    rv6ejguy

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    No, but you can fit SOHC heads and save about 12 pounds of weight.
     
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  7. Feb 15, 2017 #7

    MacPara

    MacPara

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    Thanks Ross,that gives me an idea what size to use!
     

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