NA SOHC F23A1 Build - DYNO'd!!!

Discussion in 'Engine & Transmission Mods' started by NASOHC, Jun 11, 2009.

  1. NASOHC

    NASOHC Well-Known Member

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    Ok, so this is one of three die-hard "Naturally Aspirated" F23A1-VTEC builds happening through 6GA forum. Everyone has something different they're trying out; thanks to AFAccord again for his feedback & shared info.

    Mine kinda took a different route thanks to "michaelp4283" (200whp or bust) who supplied the piston kit:

    Forged Wiseco 86.5mm (-5) piston and ring kit (custom)
    Compression will be about 10.69:1
    KaizenSpeed "Balance Shaft Eliminator" kit installed.
    Crank was balanced, of course.

    The head is another fresh one I picked up locally:

    No milling
    Ported intake & exhaust to match stock gasket
    Bisimoto Valve spring kit and stock valves and retainers.
    Flow tested head @287cfm.

    I'm also using the same WebCamshaft (custom regrind) that was used to dyno car last time.

    The intake is an F23 ported to match and the upper TB/Housing was also ported to match my 68mm TB.

    Basically, more compression, no balance shafts, home-made intake/head work and spring kit. ???whp - we'll see soon! Updated 2/16/10

    UPDATE: 2/17/2010 - 171wtq/174whp

    For those who still wonder (=200tq/203hp) at 17% drivetrain loss.


    The gain is from the green curve to aqua curve. I gained a bit over 20whp and 18wtq. Basically, my intake is all out of vacuum and restricting flow. My fuel is already at peak so if I change my intake or modify somehow to flow more, I'll need injectors and fuel pump. For now, it is what it is. I/m happy with results. The engine wants more so that's a good thing, more room for improvement.

    Thanks for following up with this thread everyone, I hope it helps shine some light for a few and helps others make other improvements.

    Here's a peek! :)

    http://www.youtube.com/watch?v=R6Z-x0MUc1c

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    Good luck to everyone else trying to pull max ponies out of these motors! :beer:
     
    Last edited: Feb 23, 2010
  2. CG6Lemon

    CG6Lemon Detailing Enthusiast

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    Re: NA SOHC F23A1 Build

    :bowdown:
     
  3. F23A1AT

    F23A1AT Well-Known Member

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    Re: NA SOHC F23A1 Build

    Nice dude GL w/ install and lets see those numbahs ASAP :thumbup:
     
  4. Russianred

    Russianred Snail Spools You!

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    Re: NA SOHC F23A1 Build

    Wow man I can't wait to see the results!
     
  5. venom1

    venom1 New Member

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    Re: NA SOHC F23A1 Build

    goood luck to you man can't wait to see the end results
     
  6. Deshon2688

    Deshon2688 Well-Known Member

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    Re: NA SOHC F23A1 Build

    I love these threads, you and AFAccord lol, and I just stumbled across michaelp4283's today. Good luck to you man.

    I'm going to pick up an h23 IM next week for pretty cheap off craigslist, and hopefully a skunk2 70mm TB along with it. That way, every time I go in my garage I'll have to look at them, thus forcing me to read more of these threads til I'm comfortable enough to do something with them :rock:
     
  7. BadgerType

    BadgerType Resident ***hole

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    Re: NA SOHC F23A1 Build

    good luck

    im sure that either one of you two can get the 200whp n/a
     
  8. CHID0

    CHID0 Well-Known Member

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    Re: NA SOHC F23A1 Build

    Props and good luck achieving your power goals, I'll be following this thread closely....
     
  9. michaelp4283

    michaelp4283 Well-Known Member

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    Re: NA SOHC F23A1 Build

    yeah! looks nice! please do post your head flow numbers.
     
  10. TheHunter

    TheHunter Well-Known Member

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    Re: NA SOHC F23A1 Build

    You better give me a ride!
     

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