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    • Mustang versus Dynojet dyno results courtesy of a VAC Motorsports built E92 M3 S65 V8

      All dynos are not created equal. One 'rule of thumb' so to speak on automotive forums is that the Mustang dyno reads lower than the Dynojet. In most cases, that is absolutely true. Take this E92 M3 modified by VAC Motorsports for instance. The car has an Active Autowerke tune, Fabspeed cat bypass, Fabspeed X-pipe, and Fabspeed mufflers. What does it put out on VAC's Mutang Dyno? 334 horsepower to the wheels. And on a Dynojet? 390 wheel horsepower in STD correction.


      That's a spread of 56 wheel horsepower for the same car with the same mods, significant. Just changing the correction on the Dynojet to SAE changes the numbers to 378 horsepower to the wheel. 12 horses less than in STD correction on the same dynojet and 44 horsepower more than on the Mustang dyno. The next time one is comparing dyno results remember that the numbers can very based on the dyno, conditions, and correction and the same car and show very different numbers due to this.

      Additionally, the Mustang Dyno does not always read low. This is commonly cited but AMS showed recently how Mustang numbers can be manipulated rather easily. Dyno numbers are just part of a picture but more often than not used for bragging rights. One thing is certain, it's easier to skew dyno numbers than a timeslip.

      Power mods:
      Active Autowerke Software
      Fabspeed primary catbypass
      Fabspeed non-resonated x-pipe
      Fabspeed MaxFlo mufflers

      VAC Mustang:
      334hp 247tq

      Dynojet SAE:
      378hp 272tq

      Dynojet STD:
      390hp 280tq






      This article was originally published in forum thread: S65 n/a Dyno Results - Mustang vs. Dynojet started by Mike@VAC View original post
      Comments 24 Comments
      1. inlineS54B32's Avatar
        inlineS54B32 -
        Click here to enlarge Originally Posted by BrenM3 Click here to enlarge
        Read the story of how the dynojet rating of HP was started back when they were created and you will see how drastically unscientific it was.
        I will check this out - didn't even notice this reply for some reason. Interesting to know - will reply when I get a chance to read up
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by inlineS54B32 Click here to enlarge
        I will check this out - didn't even notice this reply for some reason. Interesting to know - will reply when I get a chance to read up
        That story is where the 15% standard was invented.
      1. LostMarine's Avatar
        LostMarine -
        mike AT vac was the DJ at fabspeed, r/t, or the other place who's name escapes me at the moment?
      1. lulz_m3's Avatar
        lulz_m3 -
        Click here to enlarge Originally Posted by LostMarine Click here to enlarge
        mike AT vac was the DJ at fabspeed, r/t, or the other place who's name escapes me at the moment?
        Welcome back.