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  • 2001 SS Dyno

    2001 SS M6
    Mods: Clear Lid, Smooth Bellow, Magna-Flow cat back exhaust.

    The dyno was a dynapack chassis dynamometer:

    336.6 hp @5199, 369.9 ft-lbs @4175.
    The A/f was 14 @3000 to 13 @5500

    I have a feeling there is something off, the torque seems really high.

    The shop has been open for a year now and specialize in imports; my Camaro got the third highest dyno numbers they have ever had (First Chevy they have done). Not to bad for a mostly stock Camaro with 92xxx miles. The funniest part to me is that they told me their dyno will read 15-25 hp less than a dynojet, seems like ricer math to me.

    Let me know what you think, has anyone else on here run their car on a dynapack?

    My theories as to why it dynoed so high:

    1)Operator Error, something was wrong with their dyno. Does anyone know how much room there is for programming error with the dynapack?

    2)Wrong gearing in dyno, the pull was in 4th, car has stock rearend gears (3.42) but the dyno sheet showed a gear ratio of 3.299. The operator told me that that is the gear ratio with the dynapack gearing taken into account.

    3) UNLIKELY: My car has a cam that i dont know about, it started "breaking up" above 4500-4800 rpm, maybe there was a cam installed (i just bought the car 5000 miles ago) and the motor started pinging before it made its max hp. I dont think this is the case though, the car feels stock to me. (I also have a 1980 Camaro that puts out just over 400 at the motor and that one feels faster.)

    Let me know what you think.
    1980 Camaro w/ ZZ4, most of the info is correct... www.pitt.edu/~hhh1

  • #2
    It is possible that its right.I dont know about the fact that the Dynapack marks low. I know MUstang Dyno's do mark low. Does it seem like It is cam'ed?
    I have seen 320+ from a pretty much stock engine.
    Eddie
    2000 M6 Trans Am
    Tune+exhaust=344WHP

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    • #3
      were they corrected to the old SAE ratings? how about the new ones?. also what was the condition(Air temp, fan/no fan/ humidity/ time of day)
      2009 Honda Civic EX- the daily beater

      old toys - 1983 trans am, 1988 trans am, 1986 IROC-Z, 2002 Ram Off-Road, 1984 K10, 1988 Mustang GT, 2006 Silverado 2500HD

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      • #4
        The car definetly doesnt feel cammed
        My 80 has the hot cam kit, it revs much quicker and is more responsive to little amounts of throttle.

        On the charts they gave me it has "Correction Method: NONE"
        There was a fan placed under the front bumper.
        It was probly in the mid to low 60s with low humidity.
        About 5:30 pm.
        1980 Camaro w/ ZZ4, most of the info is correct... www.pitt.edu/~hhh1

        Comment


        • #5
          Originally posted by zz4camaro1980
          On the charts they gave me it has "Correction Method: NONE"
          they would be lower when corrected. thats how them ricers get those high HP numbers lol
          2009 Honda Civic EX- the daily beater

          old toys - 1983 trans am, 1988 trans am, 1986 IROC-Z, 2002 Ram Off-Road, 1984 K10, 1988 Mustang GT, 2006 Silverado 2500HD

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          • #6
            Dyno Graph

            Here is a printout with info.
            Should be attached.
            Attached Files
            1980 Camaro w/ ZZ4, most of the info is correct... www.pitt.edu/~hhh1

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            • #7
              Horsepower seems right on to me.
              LS15 Power! Another LSx engine coming soon.

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              • #8
                Originally posted by Performin Norman
                Horsepower seems right on to me.
                I agree...lid, bellow and catback. Numbers seem dead on.

                Christopher Teng

                1999 · A4 · 3.73's · Auburn LSD · Whisper Lid · K&N · Pacesetter Headers/Y-pipe
                Magnaflow Cat & Catback · MSD Coils/Wires · Bosch +4 Plugs · EGR Bypass
                B&M SuperCooler · 160* Stat · Descreened MAF · SLP CAI · BMR STB & SFC
                Strano Sways · Eibach Springs · Bilstein HD Shocks · Hawk-Pads · Brembo Blanks
                Speedlines · Nitto 555s · Texas Speed Mail Tune

                Lots of Weight Savings · Stubby Antenna · Corbeau TRS · Zaino · 273K

                F-Body Dirty Dozen

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                • #9
                  correction factor

                  I found this formula online:

                  Cf=1.18((990/Pd)*(Tc+273/298)^.5)-.18
                  Pd=pressure in mb
                  Tc=temp in C

                  Is this all there is to it and does this apply to both hp and torque?

                  According to this my correction factor would be .975 (Pd= 1006, Tc=21.67)

                  Hence, corrected 327 hp and 360 lb-ft.

                  Can anyone confirm if this formula is correct.

                  Thanks!
                  1980 Camaro w/ ZZ4, most of the info is correct... www.pitt.edu/~hhh1

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