2003 OBW, 2.5 l, auto, Dyno readings

Missing? It was never there.... these imaginary specs of 250-300BHP are just that..a dream.... Not ONE of them has a dyno run sheet to PROVE it....

hmm, that could be right depending on how your results are supposed to be interpreted since Subaru power/torque specs are reported at the flywheel not the road, and you lose about 15% through the drivetrain.

AS wrote:

I would be a little suspect of your software's readings. While I don't have any data in front of me, from memory most manufacturers quoted h/power is at the flywheel and the only way of getting an accurate measurement would be using a 'rolling road' dynomometer.

Secondly most torque is usually developed at a lower RPM than max HP.

You might enjoy searching/posting your question at the Proven power forum at

Carl

Carl, great suggestion, thank you.

Thanks to all others for the comments and suggestions.

Alex

Carl 1 Lucky Texan wrote:

I'm guessing the tool measures power at the wheels, since that would make physical sense... in that case, your numbers look really damn good. Most people only manage to get low 130's at the wheels, even with a manual transmission.

You are comparing apples and oranges.

You are measuring "chassis" horsepower or "on the ground"; Subaru's measuring it at the crankshaft. The difference is used up in mechanical losses in the transmission, differentials, CV joints, wheel bearings, rolling resistance of the tires etc and etc. Don't forget the alternator and possibly the water pump.

As you already noticed, the AC takes 4 horses to run.

Also be aware that *any* horsepower measuring device is only as good as its calibration. Most folks who deal with either engine dynamometers, chassis dynos and accelerator gauge/software dynos only use them for estimates. Their value is showing how much (and where) the horsepower and torque changes with tuning and modification.