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Exact hp

Discussion in 'General Tech and Maintenance' started by ThatGuy4life, May 30, 2007.

  1. ThatGuy4life

    ThatGuy4life The Riced Sleeper

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    So I'm sitting here at work, and I start wondering about if there is an exact hp calculation. As in for honda motors, is there a typical percentage of hp to the wheels as to what's rated at the crank? Example: Let's take a JDM itr motor, it's rated 205-210 now to get how much of that power is actually going to the wheels, would you subtract 10%, 20%, or 30%?


    Just one of those random questions.
     
  2. get_nick

    get_nick These snozzberries taste like snozzberries... VIP

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    i have heard 15-20% on fwd and 30% on awd.
     
  3. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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  4. jamesA

    jamesA Well known pissed off telephone guy VIP

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    I've always wondered how much is lost prior to the drivetrain. You only hear about drivetrain loss.

    What about the torque produced that goes into spinning the weight of the crank, rods, fly, clutch, etc too.

    Too bad earth sucks, can't ever have 100% efficiency.
     
  5. get_nick

    get_nick These snozzberries taste like snozzberries... VIP

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    well, this is why you get a light flywheel and all that stuff done. try to get as much hp to the ground as possible.
     
  6. jamesA

    jamesA Well known pissed off telephone guy VIP

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    Yeah that's my three year plan... if the engine don't blow up.

    but i was just wondering what kind of losses were there. I know I've seen stock 99-00 Si's dyno 145ish to the ground, so 15 hp drivetrain loss isn't that bad at all.
     
  7. eg6sir

    eg6sir Supa Mod Moderator VIP

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    after i get my shit painted the next mods i'm doing are lightweight flywheel and Stg1 Exedy.. .. possibly a CTR N1 crank pulley.. i dont use the other belts anyways so why not..
     
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