Regarding the 4.3L V8...
#1
Senior Member
Thread Starter
Join Date: May 2010
Posts: 364
Likes: 0
Received 5 Likes
on
4 Posts
22 X3, 21 330e, 97 M3, 97 C36 (sold), but on the hunt for a clean, low-mile C43!
Regarding the 4.3L V8...
I've always wondered about this, and just now realized I've never brought it up here, so here goes...I recall that the W210 offered a 4.2L 32-valve V8 for one (or two?) model year before changing to the 4.3L 24-valve V8. This always seemed like a step back in technology to me (from a 4- to 3-valve)...anyone know why MB did this? Had they not done that, all you C43 owners would be driving C42s instead, which I think has more potential for top-end power. Just my 2 cents...
![nix](https://mbworld.org/forums/images/smilies/nixweiss.gif)
Last edited by siideways; 05-18-2011 at 03:38 PM.
#2
MBWorld Fanatic!
Join Date: Mar 2010
Location: Land of mountains, cheese, chocolate and watches
Posts: 5,686
Received 261 Likes
on
221 Posts
12' W204 C63 AMG coupe "T-Rex", 12' W451 Smart Fortwo Pulse (99' W202 C43 AMG sold)
Thanks to MarcusF and his great articles. Check this: http://www.marcusfitzhugh.com/CLK/engd.html
#3
Senior Member
Thread Starter
Join Date: May 2010
Posts: 364
Likes: 0
Received 5 Likes
on
4 Posts
22 X3, 21 330e, 97 M3, 97 C36 (sold), but on the hunt for a clean, low-mile C43!
Thanks to MarcusF and his great articles. Check this: http://www.marcusfitzhugh.com/CLK/engd.html
![EEK!](https://mbworld.org/forums/images/smilies/eek.gif)
![thumbs](https://mbworld.org/forums/images/smilies/thumbsup.gif)
#5
MBWorld Fanatic!
this explains the "kick" @ 3,700 RPM:
Aside from being lightweight, the intake manifold on normally aspirated M113 V8 has the longest intake runners in the industry. Under hood space was saved by casting the manifold so that the long intake passages spiral around to each cylinder. Internally, the intake manifold has eight valves built into it. These valves are closed below 3,700 RPM, directing the intake air across the long intake path. That's because when an intake stream follows the long route, pressure waves develop that result in an improvement in low and mid-range torque. Unfortunately, this long path becomes a detriment at higher RPMs. In the M113, above 3,700 RPM the valves open and the intake air follows a much shorter route. This shorter route dramatically increases high speed efficiency, resulting in a substantial increase in horsepower. These ECU controlled valves create an environment in which the engine can breathe at maximum efficiency throughout the rev range.
I LOVE THAT "KICK"!!!
Aside from being lightweight, the intake manifold on normally aspirated M113 V8 has the longest intake runners in the industry. Under hood space was saved by casting the manifold so that the long intake passages spiral around to each cylinder. Internally, the intake manifold has eight valves built into it. These valves are closed below 3,700 RPM, directing the intake air across the long intake path. That's because when an intake stream follows the long route, pressure waves develop that result in an improvement in low and mid-range torque. Unfortunately, this long path becomes a detriment at higher RPMs. In the M113, above 3,700 RPM the valves open and the intake air follows a much shorter route. This shorter route dramatically increases high speed efficiency, resulting in a substantial increase in horsepower. These ECU controlled valves create an environment in which the engine can breathe at maximum efficiency throughout the rev range.
I LOVE THAT "KICK"!!!
![thumbs](https://mbworld.org/forums/images/smilies/thumbsup.gif)
#7
MBWorld Fanatic!
Trending Topics
#10
MBWorld Fanatic!
THREAD JACK!!
Like hoontastic said:
(O)regon (A)MG (O)wners (C)lub
I have started a club for owners of AMG's that live in Oregon, currently we have 6 members including myself as well as 2 members pending. We are ALWAYS looking for more members so if you own an AMG and live in Oregon PM me and we can get you in.
I am currently working on starting the Washington chapter as I have had several forum members from Washington express interest in joining but unfortunately it is only for residents of Oregon. Then I got an idea, why not start a Washington chapter???
I am putting together our first meetup which will be in July. It will start with a meet up at a local coffee shop or breakfast spot then it will be on to the 35th annual historic races @ PIR. There will be vintage race cars on display and RACING!!! Not to mention a hot rod show as well as an autocross event. We will finish it all off with a 1.5 hour cruise on a route I have designated that has plenty of twisties as well as it's fair share of straight aways
![Big Grin](https://mbworld.org/forums/images/smilies/biggrin.gif)
If you live in Oregon or Washington and are interested in joining PM me
Jason
#11
MBWorld Fanatic!
#12
Senior Member
Join Date: Sep 2010
Location: Central NJ
Posts: 378
Likes: 0
Received 0 Likes
on
0 Posts
335i
this explains the "kick" @ 3,700 RPM:
Aside from being lightweight, the intake manifold on normally aspirated M113 V8 has the longest intake runners in the industry. Under hood space was saved by casting the manifold so that the long intake passages spiral around to each cylinder. Internally, the intake manifold has eight valves built into it. These valves are closed below 3,700 RPM, directing the intake air across the long intake path. That's because when an intake stream follows the long route, pressure waves develop that result in an improvement in low and mid-range torque. Unfortunately, this long path becomes a detriment at higher RPMs. In the M113, above 3,700 RPM the valves open and the intake air follows a much shorter route. This shorter route dramatically increases high speed efficiency, resulting in a substantial increase in horsepower. These ECU controlled valves create an environment in which the engine can breathe at maximum efficiency throughout the rev range.
I LOVE THAT "KICK"!!!![thumbs](https://mbworld.org/forums/images/smilies/thumbsup.gif)
Aside from being lightweight, the intake manifold on normally aspirated M113 V8 has the longest intake runners in the industry. Under hood space was saved by casting the manifold so that the long intake passages spiral around to each cylinder. Internally, the intake manifold has eight valves built into it. These valves are closed below 3,700 RPM, directing the intake air across the long intake path. That's because when an intake stream follows the long route, pressure waves develop that result in an improvement in low and mid-range torque. Unfortunately, this long path becomes a detriment at higher RPMs. In the M113, above 3,700 RPM the valves open and the intake air follows a much shorter route. This shorter route dramatically increases high speed efficiency, resulting in a substantial increase in horsepower. These ECU controlled valves create an environment in which the engine can breathe at maximum efficiency throughout the rev range.
I LOVE THAT "KICK"!!!
![thumbs](https://mbworld.org/forums/images/smilies/thumbsup.gif)
#13
MBWorld Fanatic!
#14
MBWorld Fanatic!
I've always wondered about this, and just now realized I've never brought it up here, so here goes...I recall that the W210 offered a 4.2L 32-valve V8 for one (or two?) model year before changing to the 4.3L 24-valve V8. This always seemed like a step back in technology to me (from a 4- to 3-valve)...anyone know why MB did this? Had they not done that, all you C43 owners would be driving C42s instead, which I think has more potential for top-end power. Just my 2 cents...![nix](https://mbworld.org/forums/images/smilies/nixweiss.gif)
![nix](https://mbworld.org/forums/images/smilies/nixweiss.gif)
![Big Grin](https://mbworld.org/forums/images/smilies/biggrin.gif)