Hey folks.
mbworld flunkee here. not here to cause trouble. nor was i there to do so. i tried to stand up against a moderator who took things way too far. that's neither here nor there... on with the show...
for those who don't know me, heres a breakdown of my daily driver and now officially my project car.
I have the gas powered 272.960 3.5L v6 rated at 268hp and a redline of 6500rpm. This is the same motor designation found in many models, including the 2008-2011 w204. 2012 will bring direct-injection into the equation, and it looks like the 3.5L will also be receiving a bump in power. What many people do not realise is that a version of the 3.5L motor has already recvd the bump in power (minus the direct-inj) to bring it up to over 300hp with a 7200rpm redline in an already existing model, the 08-11 SL350(272.968) and the 09-11 SLK350(272.969). These cars are more well known for the upgrade with the red stripe on the engine cover instead of the silver one. What many more people don't know, is not only what exactly those differences are, but that 90% of the differences between my "regular" c350 and the , for instance, 09+ slk350, can be upgrade to w/o touching the crank case. I realise this sort of venture is "extreme" for most, and "not applicable" to the average reader here. That said, my goal is to not only share this information, but to prove what can be done with a little bit of research, luck, and dedication.
I have already tracked down all of the part numbers, and have access to them a click away via EPC. Essentially, MB did the following to achieve the aforementioned power out of the same 3.5L motor:
82mm throttle body (vs 74mm)
Single-stage runner composite intake manifold (vs dual-stage aluminum)
larger intake and exhaust valves w/ sodium filled stems
conical-shaped hardened valvesprings w/ new rocker arms
more aggressive profile camshaft
11.7 compression ratio via domed pistons (up from 10.7)
All of the above can be essentially swapped into the lower-rated m272 3.5L.
I will be attemtping the swap of all but the pistons. the power difference from the CR is trivial compared to the work involved.
I have thus far acquired the intake manifold and throttle body. suprisingly, none of these parts are unreasonably expensive. for instance, the intake manifold is $220 from a popular OEM parts counter website. these two pieces are slated for install in a little over 2 weeks time by myself.
this weekend OBX headers are going in place (as well as birds eye maple trim from the silver).
To date I have done a few modifications, including an ECU tune and xenon-headlights w/ projectors retrofitted from a honda s2000, a higher quality projector that what the stock MB unit has to offer. OEM MB AMG spoiler. 07 wheels from my wife's c230. authentic brabus mono V 2-piece waiting for the summer. ...blah blah
Thats all for now. Good to be here, as i come to share info. if your ego feels threatened by what im doing or if you think its silly, please keep it to yourself. i bought this car late last year for a steal and can afford to have some fun with it, to go where no one else has gone before. plus, i get to do so with a 6spd
will provide some pics of mods with some simple obersvations. not patient enough to create DIYs but Ill do what I can.
mbworld flunkee here. not here to cause trouble. nor was i there to do so. i tried to stand up against a moderator who took things way too far. that's neither here nor there... on with the show...
for those who don't know me, heres a breakdown of my daily driver and now officially my project car.
I have the gas powered 272.960 3.5L v6 rated at 268hp and a redline of 6500rpm. This is the same motor designation found in many models, including the 2008-2011 w204. 2012 will bring direct-injection into the equation, and it looks like the 3.5L will also be receiving a bump in power. What many people do not realise is that a version of the 3.5L motor has already recvd the bump in power (minus the direct-inj) to bring it up to over 300hp with a 7200rpm redline in an already existing model, the 08-11 SL350(272.968) and the 09-11 SLK350(272.969). These cars are more well known for the upgrade with the red stripe on the engine cover instead of the silver one. What many more people don't know, is not only what exactly those differences are, but that 90% of the differences between my "regular" c350 and the , for instance, 09+ slk350, can be upgrade to w/o touching the crank case. I realise this sort of venture is "extreme" for most, and "not applicable" to the average reader here. That said, my goal is to not only share this information, but to prove what can be done with a little bit of research, luck, and dedication.
I have already tracked down all of the part numbers, and have access to them a click away via EPC. Essentially, MB did the following to achieve the aforementioned power out of the same 3.5L motor:
82mm throttle body (vs 74mm)
Single-stage runner composite intake manifold (vs dual-stage aluminum)
larger intake and exhaust valves w/ sodium filled stems
conical-shaped hardened valvesprings w/ new rocker arms
more aggressive profile camshaft
11.7 compression ratio via domed pistons (up from 10.7)
All of the above can be essentially swapped into the lower-rated m272 3.5L.
I will be attemtping the swap of all but the pistons. the power difference from the CR is trivial compared to the work involved.
I have thus far acquired the intake manifold and throttle body. suprisingly, none of these parts are unreasonably expensive. for instance, the intake manifold is $220 from a popular OEM parts counter website. these two pieces are slated for install in a little over 2 weeks time by myself.
this weekend OBX headers are going in place (as well as birds eye maple trim from the silver).
To date I have done a few modifications, including an ECU tune and xenon-headlights w/ projectors retrofitted from a honda s2000, a higher quality projector that what the stock MB unit has to offer. OEM MB AMG spoiler. 07 wheels from my wife's c230. authentic brabus mono V 2-piece waiting for the summer. ...blah blah
Thats all for now. Good to be here, as i come to share info. if your ego feels threatened by what im doing or if you think its silly, please keep it to yourself. i bought this car late last year for a steal and can afford to have some fun with it, to go where no one else has gone before. plus, i get to do so with a 6spd
will provide some pics of mods with some simple obersvations. not patient enough to create DIYs but Ill do what I can.