M4 dyno test by Sportauto 465hp/577 nm

[Velon]

     Featured on BIMMERPOST.com

No power at all under 2k?

[Just_me]

Source: Sportauto

P-Rad= Wheel HP
P-Mot= Flywheel HP
M-Mot= Torque at the flywheel

P-Schlepp = Drivetrain losses

[ASAP]

That curve looks annoying lol.

[gthal]

Originally Posted by Velon

No power at all under 2k?

That's not how it felt to me from a test drive. There was no lack of power anywhere in the rev range that I could feel.

[nonagon]

Looks like the test car dynoed at 465hp. That's impressive, and more than most people were expecting.

[Phatcat]

A clearer dyno. Test weight is at 1615 KG, some might want to know. But we should all know by now that cars are never as light as the manufacturers claim it to be.

[Velon]

Originally Posted by gthal

That's not how it felt to me from a test drive. There was no lack of power anywhere in the rev range that I could feel.

That´s what I thought. Havent heard anyone complaining about the lowrevpower.

[jc05e46m3]

Originally Posted by Just_me

Source Sportauto

I can't locate this on sportauto! Where did you find it? Link?

[Phatcat]

Originally Posted by jc05e46m3

I can't locate this on sportauto! Where did you find it? Link?

It just came out, you either have to buy the magazine, or like me, subscribe it on iPad. A lot of the stuff is not on their website, if you don't want to pay, wait for people to scan it or take screenshot and post it.

[solstice]

"The S55 has linear power delivery"

[ASAP]

Originally Posted by solstice

"The S55 has linear power delivery"

I think the power delivery is about as linear as possible on a turbo motor that's setup with responsiveness in mind. The tq on the other hand...

I don't even know what to say about that.

[solstice]

Originally Posted by ASAP

I think the power delivery is about as linear as possible on a turbo motor that's setup with responsiveness in mind. The tq on the other hand...

I don't even know what to say about that.

I think it's very cool that they let the engine produce as much power it can at different rpms. This is a turbo car and they act this way. It's just hilarious how it has been quoted as having linear power delivery when you look at this dyno chart It's a wild mix of exponential, linear and flat depending on rpm.

[jc05e46m3]

Originally Posted by Phatcat

It just came out, you either have to buy the magazine, or like me, subscribe it on iPad. A lot of the stuff is not on their website, if you don't want to pay, wait for people to scan it or take screenshot and post it.

ah, I see. Thanks for the heads up- and definitely thanks for sharing!

[ASAP]

Originally Posted by solstice

I think it's very cool that they let the engine produce as much power it can at different rpms. This is a turbo car and they act this way. It's just hilarious how it has been quoted as having linear power delivery when you look at this dyno chart

I dunno why linear power delivery is such a big deal anyways. I was at the track last weekend and had my car tuned for the typical TT feeling with plenty of TQ and typical N54 power curves. I thought it was outstanding and if I had the tq cut out of the bottom, I would have gone crazy.

[Phatcat]

Originally Posted by jc05e46m3

ah, I see. Thanks for the heads up- and definitely thanks for sharing!

Go to the other thread if you want a better dyno picture. The one on nurburgring times.

[jc05e46m3]

Also, for everyones awareness:
P-Rad= whp
P-Mot= bhp
M-Mot= tq (Im assuming before drivetrain losses)

P-Schlepp is worthless if I understand correctly. Looks like towing capacity.

[myzmak]

Originally Posted by jc05e46m3

Also, for everyones awareness:
P-Rad= whp
P-Mot= bhp
M-Mot= tq (Im assuming before drivetrain losses)

P-Schlepp is worthless if I understand correctly. Looks like towing capacity.

helpful. thanks.

[ASAP]

If P-rad is truly WHP... I would like to see who else wants to argue the shift points here. Just like an N54, past 6K rpms... your power is dropping and you will shift around there. Once again, a function of small turbos.

The useless flywheel HP numbers match BMWs charts but the reality is slowly coming out.

[Boss330]

Originally Posted by solstice

"The S55 has linear power delivery"

Who are you quoting?

I don't know that it has been said that "the S55 has linear power delivery"?

I believe that a few reviewers have said however that the power delivery feels linear...

The dyno graph from Sport Auto is in fact much more linear than the BMW cartoonish graphs we've seen previously though. The drop off in torque at 5500rpm isn't as dramatic as in the official dyno graph from BMW for instance. So in that respect the dyno graph is a nice surprice

Also bear in mind that the Prad number at 1500rpm is extremely low (around 5hp), indicating a non full throttle scenario at 1500rpm IMO. This also creates that very steep rise from 1500rpm that you might not see in real world scenarios.

And 465hp/577Nm is also a significant higher number than the adverticed figures.

[Boss330]

Originally Posted by jc05e46m3

Also, for everyones awareness:
P-Rad= whp
P-Mot= bhp
M-Mot= tq (Im assuming before drivetrain losses)

P-Schlepp is worthless if I understand correctly. Looks like towing capacity.

Not quite...

P-Rad= Wheel HP
P-Mot= Flywheel HP
M-Mot= Torque at the flywheel

P-Schlepp = Drivetrain losses

Meaning that:

Pmot - Pschlepp = Prad
Prad + Pschlepp = Pmot

[JRV]

Originally Posted by ASAP

If P-rad is truly WHP... I would like to see who else wants to argue the shift points here. Just like an N54, past 6K rpms... your power is dropping and you will shift around there. Once again, a function of small turbos.

The useless flywheel HP numbers match BMWs charts but the reality is slowly coming out.

+1 I just noticed that....motor keeps making power until 7200 rpm but losing to the wheels by 6k. In any case, impressive numbers and lap time on par with what people suspected for the ring.

[myzmak]

Originally Posted by Boss330

Not quite...

P-Rad= Wheel HP
P-Mot= Flywheel HP
M-Mot= Torque at the flywheel

P-Schlepp = Drivetrain losses

MORE helpful!