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      09-23-2014, 07:57 AM   #23
dmk08
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Not sure how to extract the video but they ran F80 on a Mustang dyno. Video on front of the page. From what I read Mustang Dyno run about 12% lower than a Dynojet?

https://www.facebook.com/video/embed...29639943877640

Looks like 383whp. I cant make out the tq number but I have bad eyes.

Edit:

Linked video but don't know how to embed FaceBook video.

Last edited by dmk08; 09-23-2014 at 08:48 AM..
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      09-23-2014, 09:59 AM   #24
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Quote:
Originally Posted by dmk08
Not sure how to extract the video but they ran F80 on a Mustang dyno. Video on front of the page. From what I read Mustang Dyno run about 12% lower than a Dynojet?

http://<a href="https://www.facebook...9943877640</a>

Looks like 383whp. I cant make out the tq number but I have bad eyes.

Edit:

Linked video but don't know how to embed FaceBook video.
Thanks for the datapoint.

S65 Dyno database numbers to compare Mustang and Dynojet results:

http://www.s65dynos.com/DynoDB.php?vType=1&dynoID=3

http://www.s65dynos.com/DynoDB.php?vType=1&dynoID=2

Mustang: 301-361whp (stock)
Dynojet: 312-357whp (stock)
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      11-21-2014, 11:31 AM   #25
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A interesting comparison in the last issues of Sport Auto and Auto Bild Sportscars. Sport Auto tests the M5 CP while Auto Bild Sportscars test the M5 30 Jahre.

Both magazines do dyno testing. Sport Auto use MAHA as we have discussed in this thread. Auto Bild use INSORIC, which is not a chassis dynometer, but uses wheel sensors, barometric data, weight of vehicle, tire diameter to measure acceleration and rolling power. The INSORIC has been VERY accurate in testing and has the benefit of testing the car under it's normal conditions. Cooling, air resistance, rolling resistance etc is as under normal everyday driving conditions. I also happen to have the INSORIC test equipment myself (received it about a month ago) and can confirm it's accuracy, even when tested on a wide variety of vehicles.

Noteworthy is it that Sport Auto do not use any correction factor since the DME allready does this correction. Exactly the double dipping effect we discussed in a different thread.

The interesting thing is the difference in measured power on these two dynos...

The M5 CP is supposed to have 575PS / 680Nm
The M5 30 is supposed to have 600PS / 700Nm

M5 CP measured on a MAHA chassis dyno 649PS / 760Nm
M5 30 measured on INSORIC "road" dyno 607PS / 734Nm


The M5 CP apparently makes 74PS / 80Nm more than stated!!! A significant 12,8% more than official numbers!!! This dyno result also implies that the CP actually is 42PS and 26Nm stronger than the supposedly more powerful M5 30 Jahre...

So, could the M5 CP have been a "press car" as Sport Auto discussed in their editorial, or does it really make that much power stock?

Let's look at the acceleration numbers posted in both magazines, that should at least give us a clue as to their relative power level.

M5 CP:

0-100km/h: 4,2s
0-160km/h: 8,4s
0-200km/h: 12,6s

80-120km/h:
5th gear: 4,4s
6th gear: 5,6s
7th gear: 8,5s


M5 30 Jahre:

0-100km/h: 4,0s
0-160km/h: 7,9s
0-200km/h: 11,8s

80-120km/h:
5th gear: 4,2s
6th gear: 5,2s
7th gear: 7,4s


So, in every acceleration test above, the M5 30 Jahre is quicker, as it should be! Between 0,2s to 1,1s quicker than the M5 CP actually.

Considering the M5 CP, according to the MAHA, should have 42PS more than the 30 Jahre, the results doesn't make sense... In fact, what doesn't make sense are the relative dyno results... IMO, the INSORIC result at 607PS seems plausible. It's just 7PS more than BMW claims for the car. The MAHA result on the other hand makes no sense at all in this context... Not only does the MAHA report a massive underrating, it even implies that the 575PS M5 CP is stronger than the 600PS M5 30 Jahre...

This just illustrates the flaws of chassis dynos. Real world acceleration numbers prove the opposite of what the MAHA/INSORIC dyno sheets say. The INSORIC almost measures spot on what BMW claims while the MAHA tells a different story. Regardless of which dyno is correct, the relative measurements are way off...

To me, one more example that dyno measurements are to be taken with many grains of salt
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Last edited by Boss330; 11-21-2014 at 11:57 AM..
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      06-15-2018, 03:18 AM   #26
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M4 2015 complete Stock 102 octan
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      06-15-2018, 03:08 PM   #27
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thread started: 09-18-2014

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