until the end

i fined it 2 months ago on auction and they righting in the details mechanical dameg
i think the auction name is Manheim

kevink2

If done carefully, moving the TB would help cleanup the engine. I also know that they could use SS or CS tubing bent to shape, with rolled ends and perhaps an extra rubber joint to eliminate the 100 welds needed for the prototype, but I doubt if they kept some dimensions.

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.

.

Acapulco Bill

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.

kevink2

No idea where you are only getting "only half the boost could eventually be used" ??

Agree on method if you are going for big boost and power. But if the boost is limited to 6-7 psi, I have seen old Saab 900's NA 10.0 CR just bolt on the manifold and turbo from a Turbo model, against my warnings, and run fine off the design safety factor. No ecu changes, and instant boost response. And I think using part of a kit for a rear mount would be less expensive vs a supercharger. Rear mount turbos were used on many camaros and vetts without the super lag you suggested.

.

Acapulco Bill

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.

kevink2

@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

.

Bobby204

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.

hotcorner216

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

hotcorner216

Can't do myself*

focituner2

what particular application did you have in mind?

hotcorner216

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

focituner2

Post what they reply. I know that the the cylinder head ports are the same size as my 3.0l

kevink2

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.

.

hotcorner216

Would we have to lower our compression To fit 7 pounds of boost out of a SC?

Knightmare69

I know on my C200 CGi the compression is something like 9:3:1, I think c300 is 11:3:1 so yes, I would lower it alot more to run 7lbs safely.

hotcorner216

Acapulco bill says 10.7:1
But I'm not sure

Knightmare69

I'm pulling from the 2011 c300 specs. He might have the up to 2010 specs.

focituner2

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.

hotcorner216

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.

Acapulco Bill

@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.

Acapulco Bill

@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.

hotcorner216

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.

Acapulco Bill

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...

hotcorner216

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.

W204Man

Sorry to bring up a old topic but I was looking at supercharging my C300. Trying to figure out a safe boost PSI? Looks like 7 PSI is the max, can anyone confirm that? Maybe more maybe less?