Regarding the 4.3L V8...
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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...
Last edited by siideways; May 18, 2011 at 03:38 PM.
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From: Land of mountains, cheese, chocolate and watches
12' W204 C63 AMG coupe "T-Rex", 12' W451 Smart Fortwo Pulse (99' W202 C43 AMG + Ultima Can-Am sold)
Thanks to MarcusF and his great articles. Check this: http://www.marcusfitzhugh.com/CLK/engd.html
Thread Starter
Senior Member
Joined: May 2010
Posts: 369
Likes: 5
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
Talk about epic overkill in answering my question! Well, at least that now finally puts my question to rest! 
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From: PDX
1999 C43, 2008 P30 E63, 2014 SQ5, 2024 Model Y Performance
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"!!!
Thread Starter
Senior Member
Joined: May 2010
Posts: 369
Likes: 5
22 X3, 21 330e, 97 M3, 97 C36 (sold), but on the hunt for a clean, low-mile C43!
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1999 C43, 2008 P30 E63, 2014 SQ5, 2024 Model Y Performance
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From: Land of mountains, cheese, chocolate and watches
12' W204 C63 AMG coupe "T-Rex", 12' W451 Smart Fortwo Pulse (99' W202 C43 AMG + Ultima Can-Am sold)
OK, off topic perhaps but what is this? OAOC FOUNDER/MEMBER #1
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From: PDX
1999 C43, 2008 P30 E63, 2014 SQ5, 2024 Model Y Performance
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
If you live in Oregon or Washington and are interested in joining PM me
Jason
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Joined: Sep 2010
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From: Central NJ
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"!!!
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"!!!
MBWorld Fanatic!
Joined: Apr 2010
Posts: 4,437
Likes: 43
From: PDX
1999 C43, 2008 P30 E63, 2014 SQ5, 2024 Model Y Performance
MBWorld Fanatic!
Joined: Apr 2010
Posts: 4,437
Likes: 43
From: PDX
1999 C43, 2008 P30 E63, 2014 SQ5, 2024 Model Y Performance
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...
