Can someone explain me the dyno runs results?

[tybo]

Hello all,

I am sorry but I am not really an expert into the dyno results, and I am a little bit surprised about the results of dyno runs of Mustang S550 GT ...

In Europe the car is given to be 410bhp or 421 ch (DIN norm) , but all the dyno results are really less than that : between 380 and 390 hp ...

So, the Mustangs are not delivering all their power? or their is a ratio between the dyno results one can see on youtube and the bhp or ch ?

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[Dusten]

Hello all,

I am sorry but I am not really an expert into the dyno results, and I am a little bit surprised about the results of dyno runs of Mustang S550 GT ...

In Europe the car is given to be 410bhp or 421 ch (DIN norm) , but all the dyno results are really less than that : between 380 and 390 hp ...

So, the Mustangs are not delivering all their power? or their is a ratio between the dyno results one can see on youtube and the bhp or ch ?

The rated horsepower is at the crankshaft. There is loss between the transmission, driveline, rear diff, half shafts and tires.

 

[tybo]

Mmm I see.
And to havve the 435 hp announced by Ford ( for a North American S550 2015-2017), what would be a correct crankshaft value?

 

[Dusten]

Mmm I see.
And to havve the 435 hp announced by Ford ( for a North American S550 2015-2017), what would be a correct crankshaft value?

435. All us cars are rated at the crankshaft.

Ie the 2018 is rated at 460. They typically dyno at 420-430. Typically drivetrain loss is 10-12% in a modern car. 15-18% in an older automatic.

My 2001 ford lightning was rated at 380 and made 352 stock.

 

[tybo]

ok, so when dyno running , for example in the steeda video, from which part of the powertrain came the 372 hp value?

And what would be a proper value for a 2015-2017 model?

 

[Dusten]

ok, so when dyno running , for example in the steeda video, from which part of the powertrain came the 372 hp value?

And what would be a proper value for a 2015-2017 model?

That video is an chassis dyno. That is what we refer to as rear wheel horsepower. The amount of power actually being put to the pavement. The only accurate way to measure engine power is on an engine dyno, which is how auto manufacturers do it, using SAE standards.

2015-2017s typically make 375ish stock.
The older 2011-2014 made 350-360

 

[tybo]

And so do european ones, which are given to have the numbers of the latest S197 Coyote. so 360 rwhp are realistic...
Thanks you for your answer all is clear now

 

[Anthony 05 GT]

Yes, and dyno results will vary depending the dyno itself, temperature, humidity, and altitude, etc. The industry standard is pretty much a Dynojet with SAE corrected numbers which pretty much is the program software set to correct numbers based on temperature, altitude and other conditions. My blown '05 was on 2 different dynos in one day with exact conditions and I had a 50 hp difference between the 2. I hang my hat on the Dynojet SAE corrected numbers which were the lower numbers of the 2 dyno runs.

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