Looking for 250whp

[m3f_Sirius_880bd69485]

Which would be the most accurate?

[m3f_CMT_50ca834bd5]

Which would be the most accurate?





Too many conflicting thoughts on that one to qualify with a definitive answer.



Dynos are great to get a baseline when stock, and to return to once mods have been made. It is generally adviseable to keep returning to the same dyno to effectively gauge performance mods as jumping from dyno to dyno really gives little real idea of a mods' worthiness due to the natural variance from dyno to dyno - Even two of the same dynos, for instance two Dynapacs on either side of town, are likely to give two different numbers on the same day under the same weather conditions.



I do know that the more accurate dynos are the Dyno Dynamics and the Dynapac, but to be honest my knowlege of specific dynamometers is terribly limited.

[m3f_Sirius_880bd69485]

I would just average them personally.

[m3f_nmaino_c8ba8e1c71]

Using the average seems good to me as well, but I would try to go to a shop that places a load on the vehicle when it is on the dyno (not simply a "rolling road"). Most dyno places will give you deals if you keep coming back to them.

[m3f_M3AN_5f4dc0ba80]

Mine was done on a Dyno Dynamics dyno in 5th gear on a summer day and the numbers are consistent with other Euro dyno results. It is also consistent with results from a US engine on a Dyno Dynamics dyno (see CMT's post).



My DynoJet results are in the region of 280 rwhp but I do not consider this to be a credible type of dyno for measuring absolute power (relative power, yes, absolute power, no).



My web research shows the following:



Stock US E36 M3

DynoJet = 215 - 230 rwhp

Dyno Dynamics = 175 - 190 rwhp



Stock Euro E36 M3

DynoJet = 270 - 285 rwhp

Dyno Dynamics = 235 - 250 rwhp



And this is consistent with the graphs in the sticky in this forum.



Anyway, I was too overwhelmed by my torque numbers to worry about the Hp...

[m3f_CMT_50ca834bd5]

Believe it or not, a stock US M3 varies in whp anywhere from 185 whp 210 whp stock on a Dynojet. I have watched countless stock examples run on this setup and there is a considerable variation not only from dyno to dyno, but from M3 to M3 as well. I have never seen a stocker put down over 215 whp.



I am not surprised at all that your reading is from a Dyno Dynamics dyno.