GruppeM Intake for C63 - Taking orders now!
MBWorld Fanatic!
Joined: Aug 2005
Posts: 2,207
Likes: 2
From: North Jersey
2012 CTS-V
I might be in on a group buy if I can save about 20% off
of the current price.
...but I have two problems with this system:
1. Price
2. The right side intake is somewhat obstructed by the oil filler cap.
I wonder how much this affects airflow?
To me it looks like the left side will be receiving more air than the right
side, will the computer compensate for this?
Might the computer sense a leaner condition on one side vs. a richer
condition on the other, depending on airflow?
Am I off base with these assumptions or are these legitimate concerns?
of the current price.
...but I have two problems with this system:
1. Price
2. The right side intake is somewhat obstructed by the oil filler cap.
I wonder how much this affects airflow?
To me it looks like the left side will be receiving more air than the right
side, will the computer compensate for this?
Might the computer sense a leaner condition on one side vs. a richer
condition on the other, depending on airflow?
Am I off base with these assumptions or are these legitimate concerns?
MBWorld Fanatic!
Joined: Aug 2005
Posts: 2,207
Likes: 2
From: North Jersey
2012 CTS-V
^Based on the design it doesn't look like there was much
they could do about the filler cap.
Obviously, this system looks like it will flow more air than
stock but my main concern is the amount of airflow from
one side as opposed to the other.
I think dyno numbers won't tell the complete story but
I would like to see real world 1/4 mile track testing.
Same day track testing would be prefered. Make a couple
of stock intake runs to get a baseline, swap to the Gruppe M
and make a few more runs.
I would gladly be the guinea pig in testing this intake at a
nice discount.
they could do about the filler cap.
Obviously, this system looks like it will flow more air than
stock but my main concern is the amount of airflow from
one side as opposed to the other.
I think dyno numbers won't tell the complete story but
I would like to see real world 1/4 mile track testing.
Same day track testing would be prefered. Make a couple
of stock intake runs to get a baseline, swap to the Gruppe M
and make a few more runs.
I would gladly be the guinea pig in testing this intake at a
nice discount.
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W211 E500 Estate
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MBWorld Fanatic!
Joined: Sep 2008
Posts: 2,177
Likes: 14
From: Central Florida
2014 Audi RS7
Its a great looking piece and I would love to have a better intake set up. However, this one leaves some questions on the table and the price is not reasonable. 
How about creating a C/F ram air hood that would feed back into the stock air boxes? It couldn't cost any more and will certainly show more gains. I know some of you wouldn't like a ram air hood because its a Mercedes but I believe it could be done in an appropriate manner to compliment the car and its potential.
You can do a complete 100 shot nitrous set up that WILL show up on the dyno for the same money.
How about creating a C/F ram air hood that would feed back into the stock air boxes? It couldn't cost any more and will certainly show more gains. I know some of you wouldn't like a ram air hood because its a Mercedes but I believe it could be done in an appropriate manner to compliment the car and its potential.
You can do a complete 100 shot nitrous set up that WILL show up on the dyno for the same money.
MBWorld Fanatic!
Joined: May 2005
Posts: 2,925
Likes: 170
From: Naples FL
2021 Porsche TTS
even if it were to give you $15hp which we all know this cannot be 
, it is still highway roberry
. People have to come to their senses and not buy from a suppliers that dare price their parts like this.
, it is still highway roberry. People have to come to their senses and not buy from a suppliers that dare price their parts like this.
Super Moderator Alumni
Joined: Dec 2009
Posts: 2,189
Likes: 6
From: USA
2011 GLK 350, 2013 GT-R, & 2013 RAM 1500
Original discussion here -> https://mbworld.org/forums/c63-amg-w...ntake-box.html
More info here -> http://gruppem.co.jp/news/item_172.html
I'm still not convinced of the quoted power gains. I'd love to know more about the dyno test (setup, conditions, etc.) or see some independent results.
More info here -> http://gruppem.co.jp/news/item_172.html
I'm still not convinced of the quoted power gains. I'd love to know more about the dyno test (setup, conditions, etc.) or see some independent results.
MBWorld Fanatic!
Joined: Dec 2007
Posts: 1,237
Likes: 2
From: Miami, FL
C63 AMG(sold), 2009 CL550, 2010 S550 Majestic Black, 2010 ML550, 2006 C230, 2009 Venza
Wow we have a C63 but we getting charged for aftermarket parts as if we owned a 65. I really have no clue what goes on with this companies charging $2800 for an intake?
.... Not to mention 7k for LT headers and 4k for an ECU tune
...I hope really some reputable company stands up one day and offers quality products at reasonable, fair prices for all C63 owners.
.... Not to mention 7k for LT headers and 4k for an ECU tune...I hope really some reputable company stands up one day and offers quality products at reasonable, fair prices for all C63 owners.
MBWorld Fanatic!
Joined: Aug 2005
Posts: 2,207
Likes: 2
From: North Jersey
2012 CTS-V
Original discussion here -> https://mbworld.org/forums/c63-amg-w...ntake-box.html
More info here -> http://gruppem.co.jp/news/item_172.html
I'm still not convinced of the quoted power gains. I'd love to know more about the dyno test (setup, conditions, etc.) or see some independent results.
More info here -> http://gruppem.co.jp/news/item_172.html
I'm still not convinced of the quoted power gains. I'd love to know more about the dyno test (setup, conditions, etc.) or see some independent results.
It looks like the ECU was stock based on the translation. They made
+15HP on a stock ECU which obviously limits the throttle bodies from
opening up fully. So, if these gains are real an ECU tuned C63 could see
much greater gains.
Senior Member
Joined: Aug 2008
Posts: 272
Likes: 1
From: South Africa
2008 C63 AMG
Besides, it is near impossible to calculate flywheel power on a dyno.
What are the rwhp / rwkw gains on an accurate dyno?
MBWorld Fanatic!
Joined: Aug 2005
Posts: 2,207
Likes: 2
From: North Jersey
2012 CTS-V
on a wheel dyno. It's extremely difficult to simulate the wind speed
but I would think it's possible to see some gains just on the increase
in air volume alone.
This looks like a promising piece. I would like to see someone with
a Renntech air box add this piece.
MBWorld Fanatic!
Joined: Nov 2006
Posts: 9,137
Likes: 4
From: California, USA
E63 P30, CL500 Sport
I was thinking the same thing. The ECU will definitely adjust when it senses a leaner condition on one side than the other, and the bad news is, the ECU may actually work against you in this case and reduce power to minimize the difference. My guess is if it actually made 15 hp with this current setup, it could have actually made more power had that cover not been an obstacle.
MBWorld Fanatic!
Joined: Aug 2005
Posts: 2,207
Likes: 2
From: North Jersey
2012 CTS-V
I was thinking the same thing. The ECU will definitely adjust when it senses a leaner condition on one side than the other, and the bad news is, the ECU may actually work against you in this case and reduce power to minimize the difference. My guess is if it actually made 15 hp with this current setup, it could have actually made more power had that cover not been an obstacle.
Also, it seems the ECU was stock and it made 15HP. So a tuned
ECU could make much more.
MBWorld Fanatic!
Joined: Feb 2003
Posts: 5,983
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From: Vegas and Vancouver, BC
.
How about creating a C/F ram air hood that would feed back into the stock air boxes? It couldn't cost any more and will certainly show more gains. I know some of you wouldn't like a ram air hood because its a Mercedes but I believe it could be done in an appropriate manner to compliment the car and its potential.
