2009 C350 305 hp ?
M
I will keep my fingers crossed.... 300hp
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Last edited by 451/443=EW; Jul 12, 2008 at 03:14 PM.

I am leaning towards it myself but until I see some type of document on this forum or in person I will remain hopeful and optimistic.

I thank you all for your input
The CGI engines provide improved specific fuel consumption, that is less fuel used in providing a given level of power for a given period of time. So, a CGI operating at the same HP level as a conventional engine will consume less fuel per unit of time. But MB instead has choosen to increase the peak HP, torque and, most significantly, the RPM at which the increased power is produced. Consequently at 300-305 HP CGI can and will often use more net fuel that the conventional 268 HP engine IF YOU TAP THAT POWER. The specific consumption advantage of CGI is not enough of an improvement to compensate for the higher power and operating RPM.
It will also idle smoother due to the more precise pulses of fuel and have a little less carbonization over time. A downside is the uncertain reliability of the high pressure piezo-injectors and the need to use a fuel cooler/interchange gizmo that taps either the water or, better yet, the AC coolant to drop the temperature of the pressurized fuel.
All of that aside, more power on tap is probably a big plus for many potential buyers.....and it will be cutting edge technology.
The 2010 Cs will show a 15% improvement in fuel efficiency, and produce more power also. Look at the new 911 (it gets better mileage then a C300) as an example of a DFI application to cover both bases.
I agree with you on the complex technology for DFI - Audi is way ahead, the first MB DFI engines will be "interesting" from a reliability standpoint.
The 2010 Cs will show a 15% improvement in fuel efficiency, and produce more power also. Look at the new 911 (it gets better mileage then a C300) as an example of a DFI application to cover both bases.
I agree with you on the complex technology for DFI - Audi is way ahead, the first MB DFI engines will be "interesting" from a reliability standpoint.
I am familiar with the Audi system, but the MB system runs at higher pressures (needs more fuel cooling) and combines microsecond duration injection pulses (14-19 short per pulses per cylinder per intake stroke), variable pulse width, and variable pulse timing. It is an engineering tour de force. I sure hope they got a chance to fully develop this before they spring it on the public. However, I am hopeful for MB as they have used very similar injectors and control loops in their exotic diesel systems. If they offered it on the 2009 C350 I would probably be game to try it out.
Last edited by TRauppius; Jul 13, 2008 at 10:31 PM.
http://www.emercedesbenz.com/Feb06/2...sCLS30CGI.html
This engine is different than what will be offered in the 2009 SLK350. It does not take advantage of CGI technology, but will produce 300hp.
http://www.emercedesbenz.com/Feb06/2...sCLS30CGI.html
This engine is different than what will be offered in the 2009 SLK350. It does not take advantage of CGI technology, but will produce 300hp.
It is a known via published road tests and MB literature/websites that 2009 SLK350 is non CGI and has been tweaked to higher HP primarily through sustaining useful torques level up to an extended (higher) RPM level.
In any event it does not appear that there will be any 2009 C Class power boost, CGI or otherwise.




