Turbo c350
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Joined: Sep 2008
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From: Delaware
2004 Mazda6, 1993 RX7
If it's a rear mounted turbo then theoretically you can piece a kit together relatively cheap. Most time consuming aside from tuning would be making all the pipe work.
Also, given the placement of the TB, I imagine that's why the engine bay looks like that. It's possible to remount the TB I think but I guess the owner just didn't worry about it too much......
Also, given the placement of the TB, I imagine that's why the engine bay looks like that. It's possible to remount the TB I think but I guess the owner just didn't worry about it too much......
Most of the $8K is the labor in making a custom kit. If you have the time and capability to make all those mitered bends, and select the proper scavenger pump, yes, you could save a lot.
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From: Acapulco Mexico
2010 C300 Sport
The turbo FI solution seems counterproductive for the M272 engine, as the 3.5L compression ratio is already at 10.7:1, which limits turbo boost to a max of 7 PSI.
A supercharger would be a better solution, as ALL the boost of 7 PSi is available ALL of the time, giving instant throttle response vs. turbo lag where only about half the boost could eventually be used.
Most turbo conversions with this high a compression ratio require rebuilding the engine with a new crankshaft, shorter rods and new pistons to bring the ratio down to under 10.0:1, some even down to 7.0:1 to take advantage of the eventual spooled-up 14 PSi of boost. This is VERY EXPENSIVE, you can check Brabus' prices. Better just to trade your C350 for a C63. Or go the supercharger route which is far less expensive.
A supercharger would be a better solution, as ALL the boost of 7 PSi is available ALL of the time, giving instant throttle response vs. turbo lag where only about half the boost could eventually be used.
Most turbo conversions with this high a compression ratio require rebuilding the engine with a new crankshaft, shorter rods and new pistons to bring the ratio down to under 10.0:1, some even down to 7.0:1 to take advantage of the eventual spooled-up 14 PSi of boost. This is VERY EXPENSIVE, you can check Brabus' prices. Better just to trade your C350 for a C63. Or go the supercharger route which is far less expensive.
MBWorld Fanatic!
Joined: Sep 2008
Posts: 1,331
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From: Delaware
2004 Mazda6, 1993 RX7
The turbo FI solution seems counterproductive for the M272 engine, as the 3.5L compression ratio is already at 10.7:1, which limits turbo boost to a max of 7 PSI.
A supercharger would be a better solution, as ALL the boost of 7 PSi is available ALL of the time, giving instant throttle response vs. turbo lag where only about half the boost could eventually be used..
A supercharger would be a better solution, as ALL the boost of 7 PSi is available ALL of the time, giving instant throttle response vs. turbo lag where only about half the boost could eventually be used..
Most turbo conversions with this high a compression ratio require rebuilding the engine with a new crankshaft, shorter rods and new pistons to bring the ratio down to under 10.0:1, some even down to 7.0:1 to take advantage of the eventual spooled-up 14 PSi of boost. This is VERY EXPENSIVE, you can check Brabus' prices. Better just to trade your C350 for a C63. Or go the supercharger route which is far less expensive.
.
Last edited by kevink2; Oct 18, 2012 at 03:07 PM.
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From: Acapulco Mexico
2010 C300 Sport
Why bother with the HUGE expense of a turbo which can produce 14 PSI, with all the engineering, intercooler, intake manifold, exhaust rework, the list is long, when a supercharger and manifold rework makes things simple and inexpensive, and STILL provide the 7 PSi boost all the time?
So please go ask for a quote from Brabus that does customer turbo work on Benz, then ask for a SC quote from a quality tuner. Better results from a SC with far less cost.
So please go ask for a quote from Brabus that does customer turbo work on Benz, then ask for a SC quote from a quality tuner. Better results from a SC with far less cost.
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From: Delaware
2004 Mazda6, 1993 RX7
@Bill: I've looked at both kits for other applications. The cheaper centrifugal supercharger kits for BMW's were being installed in a "european performance" shop 10 miles away. The twin screw, one-off's are expensive, as a custom interface is needed, from the bottom of the SC, to the lower manifold.
In this Whipple(efficient but noisy) on a Vett example of a developed kit, the SC output goes through an A/L IC and then into a big cast aluminum plenum.
http://www.shopsupercharger.com/c-13...rger-kits.aspx
Still unanswered: [ No idea where you are only getting "only half the boost could eventually be used" ?? ]
Still politely asking, and not arguing
.
In this Whipple(efficient but noisy) on a Vett example of a developed kit, the SC output goes through an A/L IC and then into a big cast aluminum plenum.
http://www.shopsupercharger.com/c-13...rger-kits.aspx
Still unanswered: [ No idea where you are only getting "only half the boost could eventually be used" ?? ]
Still politely asking, and not arguing
.
Last edited by kevink2; Oct 18, 2012 at 05:13 PM.
Member
Joined: Mar 2008
Posts: 105
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From: Seattle
2001 R129 SL500, '08-'20 W204 C350
There's this Dutch company, Mosselman (sp?) that made turbo kits for C-Class. I did call a Cali shop once, quoted 5-8k installed.
Last edited by Bobby204; Oct 21, 2012 at 05:34 PM.
Senior Member
Joined: May 2011
Posts: 306
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From: Socal, USA
2008 C350 Benz, GLA250 4matic
I emailed pro charger about the application I say a bunch of you guys do it to, It would work perfectly for our cars without having to be so expensive... They don't have any plans to make one because there hasn't been enough inquiries sent in... I was thinking of retrofitting an application for my vehicle the only thing I would need done that I can do myself is an ECU tune
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Newbie
Joined: Oct 2012
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2009 C-300
I emailed pro charger about the application I say a bunch of you guys do it to, It would work perfectly for our cars without having to be so expensive... They don't have any plans to make one because there hasn't been enough inquiries sent in... I was thinking of retrofitting an application for my vehicle the only thing I would need done that I can do myself is an ECU tune
Senior Member
Joined: May 2011
Posts: 306
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From: Socal, USA
2008 C350 Benz, GLA250 4matic
Sent them a request and they are sending information on what set up would be best with my engine. They don't know exact specs but are sending a general configuration for a 250-300hp stock internal V6
Newbie
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2009 C-300
Post what they reply. I know that the the cylinder head ports are the same size as my 3.0l
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Joined: Sep 2008
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From: Delaware
2004 Mazda6, 1993 RX7
The centrifugal supercharger is usually the easiest to fit in, vs turbo and "twin screw" superchargers. They are not considered optimal by car manufacturers, since you rarely/never see them as oem. Here are the supercharger basics:
howstuffworks: superchargers
The ProCharger is used for mustang upgrades that are linked with Ford. Several manufacturers out there.
The 3.0 and esp the 3.5 V6's go well with the centrifugal superchargers since they make good power to start with, with good low end torque curves.
.
howstuffworks: superchargers
The ProCharger is used for mustang upgrades that are linked with Ford. Several manufacturers out there.
The 3.0 and esp the 3.5 V6's go well with the centrifugal superchargers since they make good power to start with, with good low end torque curves.
.
Newbie
Joined: Oct 2012
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2009 C-300
Dumb question but why is a roots style blower out of the question? With the cylinder head ports being the same for all for both the 3.0 and 3.5. A kit would be able to work for everyone. Though you won't see as much hp gain, a well designed kit would be easier to install and you wouldn't have to worry about crazy charge piping since the engine bay is a little tight. I was looking at vortech and trying to figure out where I can mount the supercharger, intercooler and charge piping but I feel it may be difficult.
Senior Member
Joined: May 2011
Posts: 306
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From: Socal, USA
2008 C350 Benz, GLA250 4matic
They have one for the w203 but and the 07 C350 is supposedly the same M272 but its 10G for the kit and not for the W204, I have a shop in riverside ca that I run with my dad, we do repair and performance work, hopefully we will be able to put some type of procharger style kit together but it's hard when the companies that sell them are I no help. They don't see us as a big enough customer base to but the time into it...I've emailed a good 9 shops who specialize in turbos and superchargers and they just say "bring it in for a one off build" and want to do turbo and charge 8Gs for it...I think it's because they make more off parting together a turbo kit than a procharger style one...but hopefully like I said we can figure one out ourselves.
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From: Acapulco Mexico
2010 C300 Sport
@hotcorner216, the standard 10:5 compression is fine for 7 PSI boost. No more though. This is easily obtainable at ALL RPMs with a supercharger. A turbo however needs to spool even for these modest amounts of boost.
MBWorld Fanatic!
Joined: Oct 2010
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From: Acapulco Mexico
2010 C300 Sport
@kevink2: I agree, to get a truly professional result in either FI format, considering a trade-in for a C63 can be a cost'effective options, in addition to perhaps 100 HP or more than either solution of adding this boost.
Senior Member
Joined: May 2011
Posts: 306
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From: Socal, USA
2008 C350 Benz, GLA250 4matic
I would trade for a C63 since the price is going down for 08 or I was considering an E55 but I purchased my C350 last year for 25k and a 4k mod would still keep my insurance where it's at and still better fuel than a V8, not the 455+hp but ill be happy in the 360-380 hp range...def sleeper compared to other cars in our category.
MBWorld Fanatic!
Joined: Oct 2010
Posts: 1,128
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From: Acapulco Mexico
2010 C300 Sport
Was offered a full-option-modified Kleeman E55 for $24,000 (basically a trade for the W204), which does 0 to 60 in about 4 seconds, a truly awesome vehicle. Maybe, maybe...
Senior Member
Joined: May 2011
Posts: 306
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From: Socal, USA
2008 C350 Benz, GLA250 4matic
I've seen a few on craigslist around that price some of them supercharged but I don't want anything modified, I'm very much so A DIY kind of person... If not done myself i like to know where it was done who did the work and what not. Don't get me wrong I'd love a modded E55 but I'd get a stock one personally.
