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Horse Power

Discussion in 'The Garage' started by MEPR, Feb 2, 2003.

  1. MEPR

    MEPR 1/2 ton status

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    About how much HP do you think a 327 punched out to 331 whith 10:1 pistons and a 650cfm carb and headers would make. Nothing realy special, i have thought and i think i need to tone down down the v-8 for my luv if i whant to be able to control it off road.
     
  2. Judd

    Judd 1/2 ton status

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    Hard to answer, not enough info on the set-up. If it is stock except for what you have said. Hmmmmm, maybe something like 150-200 RWHP.
     
  3. MEPR

    MEPR 1/2 ton status

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    yeah thats my set up all stock exept for the above mentioned. What do you think fly wheel horse power is (brake hp).
     
  4. Judd

    Judd 1/2 ton status

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    Just guessing mind you, maybe 200-250. It all really depends on how they are dynoing it. Remember the Gross HP rateings of the 60s? They came up with that number with the motor on a stand, with headers, no air cleaner and no accessories like alternator, power steering ect. The way they do it now is alot more realistic. It's called SAE HP, it's dynoed exactly like it's installed in the car.
    BTW, you might want to pick up a copy of Desktop Dyno. It's actually pretty accurate, close enough anyway. It was within 20 HP of one of my friends alcohol big blocks once he engine dynoed it.
     
  5. Triaged

    Triaged 1/2 ton status

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    Somewhere around 300lb*ft of torque and 200hp at the crank.
     
  6. heavy4x4

    heavy4x4 1/2 ton status

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    I ran those figures through Desktop Dyno - had to guess/auto-calculate some figures, but here are the numbers it figured:
    Peak HP: 235 at 4000rpm /forums/images/graemlins/smile.gif
    Peak Torque: 357 at 2000rpm /forums/images/graemlins/shocked.gif
    Both figures are estimates at the flywheel.
     
  7. MEPR

    MEPR 1/2 ton status

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    well hey thanks guys i think i may have to pick up a copy of Desktop Dyno.
    Hey could one of you guys run my luvs motor through the dyno heres the specs.
    110 cubic inches
    bored 40over
    380cfm webber
    header
    electronic ignition
    the rest is stock.
    THANKS! /forums/images/graemlins/thumb.gif
     
  8. heavy4x4

    heavy4x4 1/2 ton status

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    Well - had to do quite a bit of guessing/assuming. I used a Nissan 1.8L (110 cubic inches), bored it .040 over, gave it stock heads and valve sizes, said the compression ratio is 9.5 /forums/images/graemlins/confused.gif, used 350 cfm carb (don't have the one you said) and a single plane manifold, gave it small tube headers, and said it had a hydraulic cam /forums/images/graemlins/confused.gif with auto-calculated lift. Here's what Desktop said...are you ready for this:
    Peak HP: 89 at 4500 rpm
    Peak Torque: 116 at 3500 rpm
    Both figures at the flywheel.
     
  9. MEPR

    MEPR 1/2 ton status

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    power is way low thats not much higher than stock for an isuzu 1.8L, stock they make 85hp and 95lbs'. I was guessin about 120lbs' and at least 110hp. Bah oh well its an econo rig i dont expect it to make power. Oh one last thing isuzu motors tend to make more power becouse they use hemi heads believe it or not.
     
  10. heavy4x4

    heavy4x4 1/2 ton status

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    Isuzu isn't an option on Desktop Dyno - that's why I had to go with the Nissan.
     
  11. MEPR

    MEPR 1/2 ton status

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    grrrrrrrrrrr!!!!!! /forums/images/graemlins/mad.gif
    Isuzus kick arse, better nissan! /forums/images/graemlins/rotfl.gif /forums/images/graemlins/truck.gif
     
  12. Triaged

    Triaged 1/2 ton status

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  13. BigBurban350

    BigBurban350 1/2 ton status

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    I plugged that information in with low perf ported heads w/ 2.08 intake valves and a performance cam produced 480 hp @ 6500 RPM and 437 ftlbs @ 5000
     

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