dd_kota

variable valve timing, 4 valves per cylinder etc? Seems to me there's lots of extra power there! Anyway, just put my C32 up for sale to get an 04 E55. Saw an article in a recent car magazine that 04' MB's with V8's will have a new 7 speed auto that'll take .03 second off 0-60 times. Asked my dealer if the AMG's will get this and he said, "they make a 7 speed???" anyone have any info. TIA.

kaneman

I sold my '02 C32 for an '03 E55... realize that the E55 isn't tossable like the C32 was. It's a VERY different driving experience. But, I love it and would NEVER want to go back, it's an incredible car. The 7G tranny will only be in the non-AMG E classes, you'll still get the 5 speed.

sf49ers79

which one better? dohc or sohc?

Klint

Depends on the engine....SOHC is getting outdated. But has some tuning potential, DOHC is more modern and allows more efficient breathing of the engine, which SOHC can't provide.

Emissions is something else that affects which one is better.

Manoj

Kaneman where did you get ur signature from I would like to have one its cool

MB AMG

Mercedes says that their SOHC engines are lighter, more fuel efficent, and cheaper to build.

ntguru

I know this is a bit off topic, but kaneman, what did you get for your C32, if you don't mind my asking? DD_Kota, what are you going to ask for yours? I'm looking to sell my '03 and am trying to get a feel for where the market on C32s is.

TIA!

scorchie

Mercdes has had DOHC, 4 valves per cylinder, variable valve timing, etc.

The new modular V6/V8 are more fuel efficient, lighter, and lower emissions, while still providing power comparable to the older engines with DOHC/4 valves.

Compare:

M104, 3.2 litre, 24 valve, DOHC, variable valve timing: usually around 215 hp (depends on application)

M112, 3.2 litre, 18 valve, SOHC x2, variable intake runners: usually around 215 hp (depends on application)

M119, 5.0 litre, 32 valve, DOHC x2, variable valve timing: usually around 315 hp (depends on application) ... 347 torque

M113, 5.0 litre, 24 valve, SOHC x2, variable intake runners: usually around 302hp (depends on application) ... 339 torque

So you can see, they are pretty comparable. The lighter M113 engine pretty much made up for the difference in power from the M119 engine.

-s-

kaneman

I got 42k for it with 20k miles on it. And the signature came from Danasoft... all I do is link to the sig on their server. Right click on it and check the properties, you can do the same.

norb

MB still makes 4 cylinder DOHC engines for the 230's.

Steve Clark

currently use 3 valves per cylinder,SOHC.The paired intakes flow as well as a conventional 4-valve head. As much as I love high-revving DOHC 4-valvers,the rationale used for the current 3 valve
engines makes sense to me.
The single exhaust valve puts heat downstream faster to light off the catalysts quicker,and without such a low-emission design we wouldn't have the high torque powerplants we've become accustomed to.The extra valvegear of 4-valve DOHC would add a few pounds for each cylinder w/o much of a torque improvement.
With an engine designed to make HP by high rpm,there's not as much room for improvement as you have with a blown engine.The
high-revver is probably already flirting with it's mechanical limits, but the supercharger has no such worries.Just add boost.

Bob718

The new gearbox is called 7G-Tronic, and its supposed to be on most of the '04 V8s (CL500, SL500, S500, S430, E500.) I'm not sure if its going to be on the AMGs.