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boxboss
06-22-2009, 04:53 PM
http://www.bmwblog.com/2009/06/20/new-information-on-the-next-f10-bmw-m5/

It has been some time since we have seen some spy photos of the next generation F10 BMW M5 and so far the details on this new M have been very sketch, partially because the car is not due until late 2011. But today, courtesy of BMW’s own Scott27, we are returning with some new information, which allow me to call them, very intrigued.

The drivetrain of the F10 BMW M5 will feature a similar KERS system as the one found in the Formula 1 monoposts which will offer fuel savings technologies as well the ability to shut down cylinders while city driving. The KERS will also feature a boost button imported from the F1 cars that will allow the driver to unleash all the energy stored up.

Even though BMW was looking forward to be the first auto manufacturer to feature the kinetic energy recovery syste(KERS) in road cars, Ferrari will most likely be the one to launch a similar system first.

As expected and announced by us several times before, the new V8 twin-scroll turbo engine from the X5M/X6M models is being considered for the new M5, but…..here comes the intrigue part, BMW is also evaluating an experimental V10 turbo engine based on the V8 with two extra cylinders added.
Obviously the ability to turn automatically turn off individual cylinders will make the new M5 even more efficient than the current model and it will also align with the company’s efforts to promote their fuel savings technologies.

Two gearboxes are being considered, an updated 8-speed dual-clutch gearbox (DCT) or a more advanced 8-speed SMG. As our German editor at BimmerToday points out, people looking for more comfort in the new M5, will favor the M-DCT gearbox, but we’ll refrain from speculations at this point.

Now the question remains if the new 2012 BMW M5 engine will be able to surpass the 550 horsepower found in the X M vehicles and also, do we really need more horsepower?

NoM6D
06-22-2009, 05:15 PM
http://www.bmwblog.com/2009/06/20/new-information-on-the-next-f10-bmw-m5/


Interesting... Personally (as I've voiced too many times), I'd rather have more low end grunt at the expense of high end speed. I guess this can be accomplished through gearing, but I'm thinking the more cylinders and potentially less individual cylinder displacement lowers the torque curve or at least pushes the peak into the higher RPMs.

(I'll let you guys know when Munich asks for my advice on engine design. :mrgreen:)

boxboss
06-22-2009, 05:45 PM
Interesting... Personally (as I've voiced too many times), I'd rather have more low end grunt at the expense of high end speed. I guess this can be accomplished through gearing, but I'm thinking the more cylinders and potentially less individual cylinder displacement lowers the torque curve or at least pushes the peak into the higher RPMs.

(I'll let you guys know when Munich asks for my advice on engine design. :mrgreen:)
The rub (tradeoff) has always been high torque v high rpm. If the engine is built to handle high torque, it has too much mass to rev at the upper limits. Probably due to it's F1/autobahn heritage, BMW has favored the high rev option.

Keep in mind that torque is the ability to do work and hp is the ability to do work over time. So, a high hp/low torque engine can deliver the said torque for a longer period of time than a high torque/lower hp engine. When the lower rev limit engine upshifts, it drops to a lower torque level than the other motor that can rev higher and deliver it's peak torque longer.

(I'll let you guys know when MIT asks me to lecture on hp v torque.)

NoM6D
06-22-2009, 06:56 PM
I found this link pretty helpful (read it a few years ago, iirc).

All you wanted to know about HP and Torque, but were afraid to ask:

http://www.vettenet.org/torquehp.html

NoM6D
06-22-2009, 07:30 PM
Certain effects, such as improved acceleration from a full stop and less frequent shifting, are the result of a comparatively flat, uniform spread of engine output, starting at comparatively low engine speed.

Expanding on what I've said earlier - I encounter several stop signs around where I live, and usually there isn't too much traffic, so I could take advantage of the better acceleration at lower speeds. Maybe I'll get a Vette until I get it out of my system... :mrgreen:

ThebmwM
06-22-2009, 08:47 PM
If it does not have 550+ horsepower I won't even consider it.

m630
06-23-2009, 03:38 AM
Sounds like more bs...I don't want turbos and I don't need 8 gears!!! Give me NA period, I'll even take 8 cyliders if its NA :electric:

bdaw
06-23-2009, 07:16 AM
Sounds like more bs...I don't want turbos and I don't need 8 gears!!! Give me NA period, I'll even take 8 cyliders if its NA :electric:

my Prius doesn't have any turbos or gears. :mrgreen:

And if I get another one then I'llhave 8 cyls.

BHR4CE1
06-23-2009, 07:20 AM
And if I get another one then I'llhave 8 cyls.

Another one? :scared:


Why would ANYBODY have two of the same cars?????



:hiding:

Enigma
06-23-2009, 09:27 AM
Another one? :scared:


Why would ANYBODY have two of the same cars?????



:hiding:
Why not? He's getting ready for our 3rd Anniversary. Need a bigger car, to fit people in, when two are put together (am I right B?)... :mrgreen:

<E>

ZCP///M3
06-23-2009, 10:09 AM
http://www.bmwblog.com/2009/05/28/if-the-next-generation-2012-bmw-m5-looks-like-this/

http://www.bmwblog.com/wp-content/uploads/2012-bmw-m5-rendering-photoshop.jpg