I know the question has been raised on occasion about how the American dynos vary compared to the Dyno Dynamics dynos in use in Australia.

As luck would have it, I managed to come up with a couple of threads where unmodified Z06 Corvettes were dyno'd. These involved various vehicles, but they were unmodified. I have seen that stock cars on a dynojet 248c vary no more than about 10HP. Low being in the 350 range, and the highest I have ever seen was 363. After adding all the folks who participated in the "Post you stock dyno" thread we came away with an average of 352.759RWHP

The Mustang dyno is known to be a bit lower than the DynoJet, but the only two folks to post stock dyno sheets showed close results. So, I may have to dig for a few more sheets. Anyhow, the Dyno Dynamics came up with 323 and 329 for a stock Z06. That is about a 9% differnence vs a 248C. So, in looking at that lets assume 330RWHP on a DD vs 360 on a 248C. That would indicate roughly .91666.


So, in the case of the car I am driving currently it is 503RWHP / 455lb ft Tq on a 248C. That is roughly 461.07998 RWHP on a DD dyno which is (HP to Kw= HP*.746) 343.96 kw and I don't know what y'all rate torque in, so I don't know what to convert it to...

Kw to HP= Kw*1.341

Mustang
350/350
348/345

Dynojet
356.74/350.66
359.27/349.72


356 and 359 are stock. 372 is with the airbox lid taken off...

owner avg of polled Z06 owners -352.759


Dyno Dynamics
323.7 = 241.4802 rwkw
329.9 = 246.1054 rwkw

Here is a DynoDynamics run from a Z06 Vette with a edited PCM:

329.9whp recorded on a modified 405bhp car (which is more than likely making about 420+bhp)


Same here, look at stock numbers: 323.7whp (20% loss)



Info was taken from the following threads

http://www.z06vette.com/forums/showthread.php?p=710401
https://ls1tech.com/forums/showthread.php?t=180894


So anyway, looks like a rule of thumb is to add or subtract about 9-10% when converting from Australian to U.S. dyno and vice versa...

 

There is a Dyno Dynamics Dyno about 3 miles from me. I've noticed that the conversion math to a Dynojet isn't always correct. The owner of the Dyno Dynamics one told me a close guess would be The power you got multiplied by 1.17

XXX * 1.17 = Power on Dynojoet.

Is that correct?