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power to weight ratio

Discussion in 'The Garage' started by dirtwarrior17, Aug 5, 2005.

  1. dirtwarrior17

    dirtwarrior17 Banned

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    How do you calculate your power to weight ratio?

    Do you take the weight and divide by the hp or the tq... or both added together?
     
  2. sled_dog

    sled_dog 1 ton status

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    weight divided by hp, that would be lbs per hp.

    hp divided by weight, that would be hp per lbs. Forget which is used...
     
  3. ntsqd

    ntsqd 1/2 ton status

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    Power/weight = HP/lbs.
     
  4. BranndonC

    BranndonC 3/4 ton status

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    is 13.75 to 1 good? for a truck that is
     
  5. sled_dog

    sled_dog 1 ton status

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    that would mean you would have 68,500 HP.... I screwed up, ntsqd is right, as usual...
     
  6. Greg72

    Greg72 "Might As Well..." Staff Member Super Moderator

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    So I guess the answer is "YES"... :D



    There's a lot more to performance than a power/weight ratio, but as a general measuring stick it can be somewhat relevant. Take a look at vehicles with in the 20lbs/HP range, then in the 15lbs/HP range....and on and on.

    The "hot" cars might have a ratio in the low-teens.....crotch-rocket bikes are something like 3Lbs/Hp.

    If you know your vehicles ratio you can get a REASONABLE idea of the performance by comparing it to other vehicles with similar ratios. The things that make direct comparisons tricky are: overall gear ratio, gear spacing in tranny, available traction, frontal area, etc.

    I'd like a K5 in the 10Lbs/Hp range..... I think that would be a fun toy. A motor with around 500Hp would pretty much cover it. :usaflag:
     
  7. pismorat

    pismorat 1/2 ton status

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    Mine is 11.2lbs/hp. :saweet: Thats 475hp in my 5300 lb. :truck: I haven't gotten a chance to open her up yet...but I can't wait!!
     
  8. DavidB

    DavidB 1/2 ton status

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    :bow:
     
  9. DavidB

    DavidB 1/2 ton status

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    I"m curious...I have a dodge ram with a cummins diesel...say i hopped it up to 500hp and 1000 ft/lbs...seems like hp/weight numbers would make it seem slow (weighs 7400 lbs)...but the tq makes it faster. like was said, there's a lot more than hp/weight, i guess.
     
  10. dirtwarrior17

    dirtwarrior17 Banned

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    15.76... not bad but still a long way to go.

    by the end of next year it will be more around 13.00 when i get some darts and a good cam.
     
  11. CyberSniper

    CyberSniper 1/2 ton status Premium Member

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    Anything that isn't 10lbs/hp or less isn't considered to be "performance". 20 is on the slow side. 15 is good.

    20 is average for a pickup.
     
  12. dirtwarrior17

    dirtwarrior17 Banned

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    Tell that to civic owners...... :haha: :haha: :haha: :rotfl:
     
  13. CyberSniper

    CyberSniper 1/2 ton status Premium Member

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    They're usually happy if they can break the tires loose with the parking brake... or if they have a hint of torque steer. :haha:
     
  14. DavidB

    DavidB 1/2 ton status

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    :haha: :bow: :p:
     

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