Stock E39 M5 on the KAR Dyno

[ANiMOSiTY]

Thought I'd compare my result at Snails with my results at KAR>
Snails is definitely more stingy than KAR - but my car is running a bit better than a year ago.

Still bone stock - 100% factory standard.

Not too shabby.
(This is power at the wheels, up at altitude)

 

[200ts]

Thought I'd compare my result at Snails with my results at KAR>
Snails is definitely more stingy than KAR - but my car is running a bit better than a year ago.

Still bone stock - 100% factory standard.

Not too shabby.
(This is power at the wheels, up at altitude)

For a stock M5 that's good, but the torque is high for a stock NA at the reef at the wheels.

 

[ANiMOSiTY]

For a stock M5 that's good, but the torque is high for a stock NA at the reef at the wheels.

Here's the Snails one from January 2010:

The only changes since then, have been just regular service items.
The torque figure is a little high - the E39 M5 makes 500NM at the flywheel, stock.

In any event, inertia dynos can't measure torque anyway.
They calculate how quickly the car can accelerate the roller from one speed to another.
It measures power, and then gives a rough calculation of torque.
Turbo cars usually have overly high torque readings up at altitude as well.

 

[netercol]

correction factor is a bit on the high side if you ask me.. kar used 27% , snail used 24%

just fyi, as far as i know, the SAE J1349 spec which is supposed to define how the correction factor is arrived at, sets a upper limit of 10% correction.. ive seen dynosheets with the correction as high as 37% floating around.

not knocking your car or results though, m5 rules :thumbsup:

 

[E39er]

Depends how they are calculating the correction, it depends and ambient temperatures and pressures these change day by day, hour by hour. The percentage correction should therefore change all the time.

 

[200ts]

Congrats anyway that M5 is a daemon.

 

[netercol]

Depends how they are calculating the correction, it depends and ambient temperatures and pressures these change day by day, hour by hour. The percentage correction should therefore change all the time.

exactly.. which is nowhere near 27% :dunno:

anyways, sorry for the hijack animosity

 

[M3_FTW]

Depends how they are calculating the correction, it depends and ambient temperatures and pressures these change day by day, hour by hour. The percentage correction should therefore change all the time.

exactly.. which is nowhere near 27% :dunno:

anyways, sorry for the hijack animosity

Yes it can be, even higher sometimes. I used the SAE formula to verify it and on that day it was at 27%

Animosity to be honest I wouldnt take that dyno reading as gospel. Normally stock M5's dyno in the 205/206 range as your reading at Snail confirms.