Stock Dyno results - over 315HP?

[igor@af]

Hey guys,

I dynoed my car at Horse Power House in Lexington, KY the other day and we got some funky results.



It was done on a Mustang AWD Dyno (MD-AWD-500-SE ) which is an EDDY current dyno.

I was wondering if anyone else had dynoed theirs on an EDDY current dyno so we can compare the results.

As you can see, there is absolutely no HP drop. We took it to 6500RPM and stopped, due to the rev limiter.

I was offered an estimated conversion formula to figure out what the car is producing at the crank:

229.6 * 1.17 (difference between EDDY current and inertial dynos) / 0.85 (15% drivetrain loss) which comes out to around 316 hp. How accurate that is however, I am not sure.

But, we also dynoed a 2000 Eclipse GT (3.0 liter V6) that is rated at 210hp stock. This one had 157.5hp but had the following mods:
AEM CAI, Unorthodox underdrive pulley, Fidanza flywheel, Magnagor plug wires, and Magnaflow muffler.
By applying the same formula:
157.5 * 1.17 / 0.85 we arrive at around 220hp, which is a reasonable 10hp gain from the mods listed. However, the Eclipse is obviously FWD and so drivetrain loss is probably less.

What do you guys think?
I'd love to hear some analysis from people that are familiar with EDDY current dynos as I am told these results are very high for a stock Z, not to mention the HP does not drop anywhere at the top.

[z33guy]

the highest stock dyno ive seen is 244hp and 245tq, ill try and find out what kind of dyno these numbers were obtained on. But everyone agreed it was borderline factory freak. This is the same car that ran 13.66@101 stock except for some stickier tires.

[igor@af]

I am very interested in finding a dyno near my that's inertial, to compare the results.

[DoubleJ16]

i'm guessing the eclipse was automatic(sportronic)?