C32 AMG, C55 AMG (W203) 2001 - 2007

HG Motorsports 2006 C55 RACE CAR BUILD**

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Old 03-22-2011, 12:56 AM
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'92 300E, '06 E55
Arrow HG Motorsports 2006 C55 RACE CAR BUILD**

Hello All! This Car has been a build in progress for a long while, and has not posted anywhere. But now that we are nearing completion, I figured that it is time to post up some photos and info of the car. Looking forward to what you all have to say!

The HG Motorsports C55 started off as an innocent sedan which was driven to mostly run errands, and ocassionaly have the gas stepped on to make the hair on your neck rise. But it got into the hands of HGM. Once they received it, there was only one idea in mind with the car. To build the first purpose built road course Mercedes-Benz, and dominate.

The first thing to go was the entire interior. Everything except the dashboard and components were removed. HGM even went the the distance and removed the roof which included the sunroof and installed one off another C-Class model to help lower the center of gravity. Second modification to the car was a complete roll cage. The car was sent off to Technosquare in La. And with their amazing skills, installed a flawlessly clean cage.



After the car was returned, the motor and transmission were removed and sent to Renntech in Florida. Renntech then tore apart the motor and rebuilt with stronger internals, higher compression, and much more. The transmission was also rebuilt to accomodate the increase in power from the new motor. Once the engine and transmission were returned they were installed and the car came back to life!

Once the most time intensive modifactions were finished, it was time to address the other components such as suspension, brakes, wheels, and tires. For the suspesion, KW stepped into the project and the car was then equipped with their Variant 3 coilover system. For the brakes, Brembo stepped in and had their Gran Turismo 6 Piston Front/4 Piston Rear monoblock race brake kit installed. The wheels chosen for the C55 were Renntech's very own 18x8.5 fronts and 18x10.5 rears. And lastly but surely not least were the tires. The tires are on the car at the moment are the Hoosier R6's. 255/30/18 Fronts and 285/35/18 Rears



This particular race car was built to run in the modified class for the time trial events. There are many more things progressing with the car, and there will be more updates as they come. Dyno sheet, full aerodynamics, and weight saving will be coming soon.





Other updates and videos from HG Motorsports will also be available on their website www.hgmotorsports.com and exclusive magazine coverage from Auto Eclectic on their website www.autoeclectic.com

Cheers!

Last edited by Nola; 03-23-2011 at 03:40 PM. Reason: Returned to all its HGMotorsport goodness!
Old 03-22-2011, 12:58 AM
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'92 300E, '06 E55
As it stands, the car is at RennTech in Florida getting the final touches on the tune!

Vehicle Specs:
Modified combustion chamber
Light weight valves
Modified to solid lifters
Weight modified pistons
balanced and blue printed
modified block
12:1 compression ratio
Intake and Exhaust modified and ported
Transmission upgraded with additional clutch packs
Requires 100 octane fuel
Brembo Monoblock 6 Piston Front 4 Piston Rear Big Brake Kit
H&R Springs (KW Triple Adjustable Race Shocks on Way)
Renntech Wheels 18x9.5/18x10.5
Custom Roll Cage by Technosquare

Estimated horsepower 450 or more depending on application and engine management.

The aero that will be added will include a front splitter, to a complete under tray to a diffuser all the way back.

The entire exhaust system will be re-routed once the aero construction takes place.

Last edited by HGMotorsports; 03-23-2011 at 04:00 PM.
Old 03-22-2011, 02:04 AM
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w203 m112
woah! where did this come from? Subscribed!
Old 03-22-2011, 02:08 AM
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06 C55, 09 E350
What's the estimated power it's putting out? I am very intrigued tell us more please.
Old 03-22-2011, 02:38 AM
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Old 03-22-2011, 06:34 AM
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Awesome!
Old 03-22-2011, 06:49 AM
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1992 Toyota Corolla, 1994 Chevy C1500, 2002 C32, 2012 Prius, 2013 Toyota Sienna
This car is so bada$$ it caused HGmotorsports to get put on probation in just 7 posts.....
Old 03-22-2011, 06:53 AM
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a car.
Wow, 6:00am wake up call. I'd never need another cup of coffee if I had something this intriguing to read every morning.
Old 03-22-2011, 07:00 AM
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Wow, nice! Did they supercharge the engine? What was exactly done to it?
Old 03-22-2011, 07:31 AM
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'06 E55 K2
Curious to see the dyno numbers after Renntech's engine mods \ rebuild and also the weight of the car.
Old 03-22-2011, 07:45 AM
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2005 E55 AMG
+ 1 I'm very interested to see where this is going. What did you guys do in order to have those tires fit? I'm sure plenty on here would love to put 285s out back.
Old 03-22-2011, 08:40 AM
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Sweet!!!
Old 03-22-2011, 08:55 AM
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Very cool. Can't wait to see your dyno numbers.

Why does the exhaust on the right looks like it's falling off?
Old 03-22-2011, 08:59 AM
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PLAID
Originally Posted by mdncn2762
This car is so bada$$ it caused HGmotorsports to get put on probation in just 7 posts.....
and they have NO post history other than this???

Pray Tell, what time trials are we talking about here? SCCA??

Last edited by Newzchspy; 03-22-2011 at 11:20 AM.
Old 03-22-2011, 10:55 AM
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CLS, SLK, ETC
Respect!
Old 03-22-2011, 12:41 PM
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w203 m112
Holly crap, i just read that again.

255/30/18 Fronts and 285/35/18 Rears - how the heck did they get these tires to fit?? Especially the front!
Old 03-22-2011, 01:05 PM
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they weren't on probation last night when they posted this. my guess is that they aren't paying for sponsor rights on this forum? free publicity?
Old 03-22-2011, 01:43 PM
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Uhmm.. insane? Love them roll cage!
Old 03-22-2011, 02:48 PM
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I love it, but its hard to believe a purpose built racer would get by with an auto trans.
Old 03-22-2011, 03:53 PM
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Originally Posted by billbillw
I love it, but its hard to believe a purpose built racer would get by with an auto trans.
Very valid point. Still awesome though. I'm looking forward to updates on EVERYTHING.
Old 03-22-2011, 04:41 PM
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still innocent sedan-looking tho, exterior wise, nothing crazy.

was thinking more along this line when i read race car

Old 03-22-2011, 06:42 PM
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Originally Posted by 02C32guy;4584781[B
]Very valid poin[/B]t. Still awesome though. I'm looking forward to updates on EVERYTHING.
Tell that to the guys racing who are using the DSG's. The manual is not dead, BUT its on life support!!

For example, the Corvette auto is quicker than the manual since about 2003 or so.
Old 03-22-2011, 09:13 PM
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Pretty sweet!
Old 03-22-2011, 09:58 PM
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Now that's something you don't see everyday! Good choice on the wheels btw..
Old 03-22-2011, 10:43 PM
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C55 AMG, 135i, 911 GT3, GLE43 AMG
Originally Posted by HGmotorsports
...The C55 started off as an innocent sedan which was driven to mostly run errands, and ocassionaly have the gas stepped on to make the hair on your neck rise. There was only one idea in mind with the car. To build the first purpose built road course Mercedes-Benz, and dominate.

The first thing to go was the entire interior. Everything except the dashboard and components were removed. Even went the the distance and removed the roof which included the sunroof and installed one off another C-Class model to help lower the center of gravity. Second modification to the car was a complete roll cage. The car was sent off to Technosquare in La. And with their amazing skills, installed a flawlessly clean cage.

After the car was returned, the motor and transmission were removed and sent to Renntech in Florida. Renntech then tore apart the motor and rebuilt with stronger internals, higher compression, and much more. The transmission was also rebuilt to accomodate the increase in power from the new motor. Once the engine and transmission were returned they were installed and the car came back to life!

Once the most time intensive modifactions were finished, it was time to address the other components such as suspension, brakes, wheels, and tires. For the suspesion, KW stepped into the project and the car was then equipped with their Variant 3 coilover system. For the brakes, Brembo stepped in and had their Gran Turismo 6 Piston Front/4 Piston Rear monoblock race brake kit installed. The wheels chosen for the C55 were Renntech's very own 18x8.5 fronts and 18x10.5 rears. And lastly but surely not least were the tires. The tires are on the car at the moment are the Hoosier R6's. 255/30/18 Fronts and 285/35/18 Rears

This particular race car was built to run in the modified class for the time trial events. There are many more things progressing with the car, and there will be more updates as they come. Dyno sheet, full aerodynamics, and weight saving will be coming soon....
What an awesome project. For me, building a decent track car for competition/time attack/time trials for road racing/lapping is far more interesting to read about than simply maximizing straight line acceleration. In my opinion, the W203 C55 is a decent, but not ideal platform to start with.

From your description, I guess you are staying naturally aspirated, which I think is a good thing.....adding a supercharger adds weight in all the wrong areas. Maximizing the NA output of the 5.4L V8 with lighter internals, higher compression, ECU tuning (and presumeably header/exhaust work) should yield hopefully > 400-415HP at the crank. That combined with stripping the interior and all unnecessary weight should yield an excellent power-to-weight ratio to maximize acceleration while keeping the more linear throttle response of a NA engine.

I'm also interested to see what was done to the transmission. Hopefully, it's shift speeds have been enhanced, in addition to simply being more robust to handle the increased power.

I'm also curious about whether work was done to increase the negative camber of the front and/or rear wheels and whether you plan or already have installed a mechanical limited slip differential (or whether you think the standard electronic "pseudo limited slip" diff) is good enough for your purposes.

Anyways, I look forward to the updates as they come along.


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