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Original HP on a 86

Discussion in 'The Garage' started by MountainMan, Feb 6, 2004.

  1. MountainMan

    MountainMan Registered Member

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    Anyone know what the stock HP of a 86 K5 would be (5.7 350) ?

    and if you know that one, how much power degade might be average for one with 135K miles? (i know thats a tough one, but some guesses would be interesting)

    /forums/images/graemlins/k5.gif
     
  2. Fubeca

    Fubeca 1/2 ton status

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    I'm having a hard time reading it (http://coloradok5.com/brochures/1986/blazer7.jpg) but it looks like 166hp at 3800 rpm and 275 ft-lbs at 1600 rpm.
    If the motor is totally stock with 135k it wouldn't surprize me to be as low as 100hp but who knows. /forums/images/graemlins/dunno.gif
     
  3. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    165 hp and 285 lbs of torque...(as near as I can remember)

    Real world numbers at the rear wheels depends on a ton of things, and how much loss you're seeing due to wear would be impossible to even guess at. Manual tranny trucks would see more power at the wheels for example.

    Rene
     
  4. MountainMan

    MountainMan Registered Member

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    Thanks guys! thats helpful, i think it says 166 also

    ... take care ... /forums/images/graemlins/k5.gif
     
  5. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

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    You aren't putting anywhere near that much to the ground though. I have a built 406 with 9K on the odometer. I just had it dyno'd and it put 215HP and 296ft pounds of torque to the ground. /forums/images/graemlins/yikes.gif /forums/images/graemlins/eek.gif /forums/images/graemlins/yikes.gif /forums/images/graemlins/mad.gif Oh well. /forums/images/graemlins/frown.gif

    With my old 350 that had 80,000 miles on it, true dual exhaust, no converters, and a K&N...I put 120 HP to the ground at 3000 and 3,500 RPM's.

    We loose a lot of power with 4x4's by the time it goes through the t-case, big rearends, and larger tires. The dyno shop told me I was probably loosing at least 30%. /forums/images/graemlins/yikes.gif Also, th700's have a LOT of paresetic drag compared to a th350 or something.
     
  6. Fubeca

    Fubeca 1/2 ton status

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    My '84 6.2L put a peak of 56HP to the ground /forums/images/graemlins/rotfl.gif.
     
  7. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

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    [ QUOTE ]
    My '84 6.2L put a peak of 56HP to the ground /forums/images/graemlins/rotfl.gif.

    [/ QUOTE ]
    Holy crap! /forums/images/graemlins/eek.gif
    Horsepower hog! /forums/images/graemlins/rotfl.gif
     
  8. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Wow, your 6.2 must have some issues.

    Here is the chassis dyno sheet for project Blazer (peterson's)

    [​IMG]

    As you can see the new baseline after all the little problems were taken care of was 114 hp and 329 lbs/ft at the rear wheels.

    Rene
     
  9. Blue85

    Blue85 Troll Premium Member

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    That explains a lot.
     
  10. R72K5

    R72K5 Banned

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    stock hp you could find out by getting stamping code off front of engine deck and looking it up at nastyz28.com, there were several 5.7L engines for any given year, all with different ratings, all depend son what vehicle and what engine vin code digit too.
     

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