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Crazy Torque Figures - Are they right??

Discussion in 'General' started by izedso, Jul 25, 2006.

  1. izedso

    izedso It's not a family wagon!!

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    Hey all,

    Finally got it all going, in 6 week period I went through both an Engine & Auto.
    Engine is now 100,K VT V6, Auto is just a stock reco.
    Took it into Mike's Dyno, due to a metallic rattle in the engine and get a base power figure before any major mods. (Just custom CAI so far)

    I looked on the forums but no-one seems to have any real figures I can compare with.
    The dyno figures have shocked me a bit, I dont know how true they are.
    On paper it pulled 95.4rwkw & 636nm torque (at the treads)
    The power figure seems about right, but the torque seems to be off the chart.
    The torque line actually has its highest point at 59kmh, then goes down:cry:
    Any ideas if this is right or not are much appreciated.

    Any one else had their beast dyno'd latley?? If so what figure did you pull?

    I dont have a scanner, but if someone in the SE Suburbs who does wants to help me get the dyno sheet up, PM me.
     
  2. commod8

    commod8 swim wit da fishes

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    um, i just read 636nm torque!??!? oh my god wtf. i wanna see what the rest have to say about this!
     
  3. 1991_Vn2nV

    1991_Vn2nV New Member

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    Also the rwkw figure seems low for a VT V6... I thought they were normally between 105rwkw-110rwkw stock?
     
    Last edited: Jul 26, 2006
  4. andyman

    andyman The Only 6sp VZ Wagon

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    get it done at another place and you will see
     
  5. greenfoam

    greenfoam New Member

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    That's torque at the wheels, not at the engine. Don't forget the car has a gearbox, diff and wheels on it :)
     
  6. izedso

    izedso It's not a family wagon!!

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    As far as I was aware the VS-VT engine had 147kw at the flywheel from factory, which by my rough euneducated guess 95rwkw is about right(especially for a 100,00k engine) But I dont know what the torque figures should be??
     
  7. Girl Torque

    Girl Torque VL Calais 5L

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    doesn't sound right. My hubby's 502 was 480hp with 550+nm torque.. and she's a bigg motor
     
  8. izedso

    izedso It's not a family wagon!!

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    I agree it doesnt sound right.. As far as I am aware that is the sort of figure a turbo'd beast might pull.
    It does pull damn hard off the line, and traction in the wet is non existant, but 600+nm seems ridiculous.

    Can anyone suggest a second dyno place in SE suburbs??
     
  9. pandaman

    pandaman Aussie Muscle Fan

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    Dude, what is being measured at the rear wheels is not the same as torque at the engine. Greenfoam told you why this happens, just not in a lot of detail. It's called torque multiplication. The gearing of a commodore is such that in top gear the wheels are spinning slower than the engine by a factor of 2.156, in lower gears and with the torque converter unlocked that ratio is higher. So the torque that appears at the wheels will be much higher than it is at the engine. It's a thing called mechanical advantage, kinda like using a lever to lift something heavy.

    95.4kW is actually quite respectable for your vehicle if it's fairly standard. Dunno why you're upset about the torque curve being a little peaky, it's a standard engine FFS. Put a few mods on it get it breathing better and you should see it flatten out quite nicely.
     
  10. shaggerz

    shaggerz New Member

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    He speaks the truth does pandaman :yeah:
     
  11. izedso

    izedso It's not a family wagon!!

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    Thanks Pandaman (& shaggerz).
    That is the sort of info i was after. Much appreciated.
    Only mod so far is a custom CAI, and I cleaned the throttle body and plenum chamber before the dyno.

    Once again, Thanks for your help in understanding this all.
     
  12. pandaman

    pandaman Aussie Muscle Fan

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    Too easy mate, any other questions just post em up. That's the great thing about forums, no matter what the question is, someone will know the answer. :D
     

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