M5 vs E63s drag/rolling and brake test

vtknight · 03-29-2018, 03:48 PM

Quote:

Originally Posted by Goonba

Just wanted to add to this as there is a similar mechanic in the e63s.....

In the e63s you can manually increase the revs for launch by clicking the "UP" paddle (i.e. mash the throttle and break and click the paddle). The revs will increase +500rpm to 4,000rpm. This results in much more aggressive launch and 10.9 1/4 is easily achievable. What is surprising is that no journalist in the Western world has done this, but every journalist in Russia has. It will probably result in a much worse beating for the M5.

The guy in the video below does this procedure and is able to do 11 flat all day on a terrible surface (I have been there, exotic RWD just cannot launch there).

https://www.youtube.com/watch?v=s41BKOFgb3Y

These are fair points. I don't know if the M5 is capable of adjusting its launch control?

What I do find important is the tire differences. The PS4's would make a sizable difference - especially for crappy surfaces. One to one testing is needed to get one to one results.

I am still betting that the Motortrend comparo will show the F90 slightly quicker to 60 and through the 1/4. E63S has the superior roll/top end.

onfireX5 · 03-29-2018, 10:09 PM

Quote:

Originally Posted by Goonba

Just wanted to add to this as there is a similar mechanic in the e63s.....

In the e63s you can manually increase the revs for launch by clicking the "UP" paddle (i.e. mash the throttle and break and click the paddle). The revs will increase +500rpm to 4,000rpm. This results in much more aggressive launch and 10.9 1/4 is easily achievable. What is surprising is that no journalist in the Western world has done this, but every journalist in Russia has. It will probably result in a much worse beating for the M5.

The guy in the video below does this procedure and is able to do 11 flat all day on a terrible surface (I have been there, exotic RWD just cannot launch there).

https://www.youtube.com/watch?v=s41BKOFgb3Y

Hmmmmm

vtknight · 03-29-2018, 11:03 PM

Quote:

Originally Posted by onfireX5

Hmmmmm

Well well well...

AD18 · 03-30-2018, 10:20 AM

I think the CarWow video was a pretty good test of both cars, same track conditions, same time etc.
I'm not surprised the times he was posting on a hot racetrack are faster than a cold damp UK runway, and nor should anyone else be. If the blue M5 he tested was a BMW press car it would only raise my doubts about the times, imo. Would it really be a 100% standard car, who knows.
Two production customer cars on the same track at the same time would be the best comparison videos and I'm sure more will be coming out in the near future. Nevertheless, before watching this video i was expecting the M5 to be the faster car.

MTHX · 03-30-2018, 11:24 AM

Questiin, for the Break-in period is 2000 km or 2000 miles?

Phatcat · 03-30-2018, 01:01 PM

Quote:

Originally Posted by MTHX

Questiin, for the Break-in period is 2000 km or 2000 miles?

1200 miles or 2000 km, just depends on which country you are in.

F85FTW · 03-31-2018, 12:03 AM

Quote:

Originally Posted by onfireX5

Hmmmmm

This only works for the m4 and e63s because there transmissions have clutches. Dual clutch in the m4 and multi clutch in the e63s this allows you to disengage the trans to freely rev the motor. They then drop the clutch to let the surge of power through while gradually slipping the clutch to keep wheel spin down. The F90 has a torque converter automatic which makes this impossible. The F90’s launch control isn’t a real launch control it just has a higher stall torque converter that allows some more revs before moving the car. You can not increase the rpm in the f90 as that would cause the car to move. It’s just like doing a “brake torque” launch with your foot on the gas and brake at the same time it’s just better controlled by the F90 “launch control” computer.

frankchn · 03-31-2018, 01:38 AM

True, though I am not sure why that doesn’t allow adjusting rpms before launch as long as you are not loading the driveline too much. I assume the car will go out of launch control mode (and into limp mode) if it detects high temperatures in the torque converter to protect itself.

The ZF8 box should be perfectly capable of decent launches whatever the internals, given that it is used in the Dodge Demon as well.

03-30-2018, 10:20 AM	#48
AD18 Lieutenant 351 Rep 521 Posts Drives: Azurite Black E92 335i DCT Join Date: May 2015 Location: UK iTrader: (0)	I think the CarWow video was a pretty good test of both cars, same track conditions, same time etc. I'm not surprised the times he was posting on a hot racetrack are faster than a cold damp UK runway, and nor should anyone else be. If the blue M5 he tested was a BMW press car it would only raise my doubts about the times, imo. Would it really be a 100% standard car, who knows. Two production customer cars on the same track at the same time would be the best comparison videos and I'm sure more will be coming out in the near future. Nevertheless, before watching this video i was expecting the M5 to be the faster car.
	Appreciate 0 Quote

03-30-2018, 11:24 AM	#49
MTHX First Lieutenant 233 Rep 354 Posts Drives: 335XI MPerformance edition Join Date: Jun 2015 Location: Québec Province iTrader: (0) Garage List 2018 F90M5 [0.00]	Questiin, for the Break-in period is 2000 km or 2000 miles?
	Appreciate 0 Quote

03-31-2018, 01:38 AM	#52
frankchn First Lieutenant 288 Rep 371 Posts Drives: F90 M5 Join Date: Aug 2015 Location: Bay Area iTrader: (0)	True, though I am not sure why that doesn’t allow adjusting rpms before launch as long as you are not loading the driveline too much. I assume the car will go out of launch control mode (and into limp mode) if it detects high temperatures in the torque converter to protect itself. The ZF8 box should be perfectly capable of decent launches whatever the internals, given that it is used in the Dodge Demon as well.
	Appreciate 0 Quote