Best way to launch the M5 According to AutoBild Sportscars: - DSC OFF, S3-mode - Left foot on the brake, right foot builds up the revs a bit - Release the brake - Quick-shift to 2nd gear at 4000 rpm - Be gentle with the throttle The result is 3,9 s 0-100 kph, a few tenths faster than Launch Control. :t-cheers:
I found the same thing with the M3, I was quicker doing it myself than using launch control. Kind of odd when it's suppose to be thing to yield the best results.
This is true for the MCT-AMGs as well. Their Race Start function is only good for managing factory-times, with a sensible right foot all of them is quicker. The E63 PP did 4,4 s in Sport Auto with a "nearly perfect launch control", while the guys at AutoBild Sportscars did 4,1 s with launching from 1800 rpm.
3,9 sec!!!!!!!!! What about the M3?????? It will be faster than a 911 Carrera S! I hate it, with turbos it is just so easy!
^ But that would be pointless, as you test the wheel horsepower with a dyno. You can read the manual for the crank, I can't see a way to simply test that? I think it's at the wheels, there's more torque too... How, if you want to make it 3.9 secs?
^I meant they measured the WHP and added some standard "loss factor" and stated the calculated HP at the crank.
Yeah, that could have been the case...which makes me wonder, how does one calculate this 'loss factor'? It must be different for ever model/brand.. But the latest trend in BMW dyno tests result in underpowered figures by BMW on quite a few occasions, which is why I thought it could very well be at the wheels. Nevertheless, I guess we have to wait for DeDe for a verdict on that one But going by the vid? WHP...
There is no way around it, 1st gear, DSC off and full throttle is just another way of making a fast U-turn.
I really want to. I have promised Nas to take some fotos but got overwhelmed with work, I barely sleep last 3 days. I promise soooooon.
Not whp, guaranteed. The torque number would be insanely high using even low loss ratings (707rwnm ~ 806fwnm with only 14% loss). Those numbers are at the crank.
Not sure if I understand that one, but you are clear. So this one has 3 more hp, and like 25 more Nm compared to factory times. It will be interesting to see a few more M5s on the dyno, for sure!
Forget model/brand, it even varies car to car based on mileage, run in, manufacturing tolerance. Heck, it even changes across the rev range, as at higher speeds the frictional loss is higher. So, no, the 'loss factor' is not an accurate figure, just a very rough approximation. Of course, bigger shops have a engine dynos where you can measure the torque at the crank directly.
This one isn't. Seen another review of a russian guy where it put out 560hp. It makes what BMW says it makes, give it or take it couple hp.
[video=youtube;V2_FvUTddgw]http://www.youtube.com/watch?feature=player_embedded&v=V2_FvUTddgw#![/media]
Just for comparison, here's the CLS63 AMG with Performance Package on the same dyno. What a torque! I think these are crank-figures. Model: M5 F10 vs. CLS63 AMG PP Power: 563 hp / 6283 rpm vs. 533 hp / 5129 rpm Torque: 707 Nm/ 4845 rpm vs. 783 Nm / 4090 rpm
