C32 AMG, C55 AMG (W203) 2001 - 2007

How does C63 get 50+ hp from an ECU Reflash?

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Old 10-25-2012, 07:31 PM
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05 C55 AMG
How does C63 get 50+ hp from an ECU Reflash?

Can someone explain this to me? Did Mercedes intentionally de-tune the crap out of this engine from the factory?

Where does the extra power come from in the tune?
Old 10-25-2012, 08:31 PM
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Probably, needed to save some difference for the bigger cars.
Old 10-25-2012, 08:32 PM
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It is super under tuned from the factory.
Old 10-25-2012, 08:51 PM
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w203 m112
Originally Posted by AMG3.2
It is super under tuned from the factory.
this. The other NA 63 motors push out lots more power right from the factory. Same motor.... different tune.
Old 10-25-2012, 08:52 PM
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05 C55 AMG
Is the m113 engine in the C55 really that much worse than the 6.3? K&N filters, no second cat, and a tune will net you approx 400bhp...correct me if I am wrong. Same mods on a 6.3 you will get around 530bhp.

The new engine makes roughly 10 more hp per liter.

I was able to find a write-up and I guess they are a lot different... I did not know that. 3 valves per cylinder to 4, SOHC to DOHC, increased rpm, twin throttle bodies...

Ok it all makes sense now.

Last edited by Quickvr4; 10-25-2012 at 09:03 PM.
Old 10-26-2012, 12:03 AM
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I understand that the C63 WOT tuning leaves the throttle body butterfly at only 50% compared to the same motor in the bigger cars. Aftermarket tunes solve that fairly easily apparently.
Old 10-26-2012, 12:39 AM
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C63 AMG, P30
Originally Posted by Saaboteur
I understand that the C63 WOT tuning leaves the throttle body butterfly at only 50% compared to the same motor in the bigger cars. Aftermarket tunes solve that fairly easily apparently.
Holy crap, that's some serious de-tuning.
Old 10-26-2012, 01:25 AM
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Good thread, no one really answered the question why Mercedes did it yet though. Marketing for people to still buy the E class?
Old 10-26-2012, 01:51 AM
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Exactly, they have to differentiate their products somehow.
Old 10-26-2012, 02:34 AM
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I thought there were some minor mechanical differences also. Doesn't the E63 have slightly higher compression than the C63 also?

Yes, there is no point spending millions on R&D for a new engine when you can detune your current performance one from the parts bin and use that. So yeah they made it crappier to differentiate the C class from the E and S, in my opinion of course. The ecu tune on the C63 and E63 come out about the same afterwards. The C gains 50hp, the E gains 10hp.
Old 10-26-2012, 04:43 AM
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C55 AMG T with Kleemann K2 and some stuff: 414 hp and 576Nm :-)
As mentioned, the C63 throttel doesn´t open full at "wot", it´s limited by
the ECU. Another thing is that the headers are smaller on the C63 to fit
in that small enginebay.
Old 10-26-2012, 06:56 AM
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The C and E 63 both have 11.3:1 compression ratio. Its the C and E 55 that have different compression ratios.
Old 10-26-2012, 12:10 PM
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w203 m112
The m113 was first released in 98! Its amazing the m113 has stuck around till 06 when the m156 started showing up. Its just a HUGE different in technology that makes the new motor an absolute beast and makes m113s look dated.
Old 10-29-2012, 01:53 PM
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Originally Posted by michael kuzni
Good thread, no one really answered the question why Mercedes did it yet though. Marketing for people to still buy the E class?
I think it has more to do with the C55 MAF (not on the 63) than the tune itself. The C55 is NOT a very tunable car with the MAF. We are going to get rid of the MAF on my Kleemann so a "real tune" can be done.
Old 10-29-2012, 05:56 PM
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05 C55 AMG
Does the 63 use MAP?
Old 10-29-2012, 06:08 PM
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Originally Posted by Newzchspy
I think it has more to do with the C55 MAF (not on the 63) than the tune itself. The C55 is NOT a very tunable car with the MAF. We are going to get rid of the MAF on my Kleemann so a "real tune" can be done.
And just use the MAP sensor? That would be interesting. Are you going to post up any information about this process?
Old 10-29-2012, 06:22 PM
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Originally Posted by TruTaing
The m113 was first released in 98! Its amazing the m113 has stuck around till 06 when the m156 started showing up. Its just a HUGE different in technology that makes the new motor an absolute beast and makes m113s look dated.
This +1

Its like saying how the hell does some turbo 4-banger has more power than some big displacement v8. One word: technology.
Old 10-30-2012, 09:19 PM
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02 CLK 55 AMG,09 C63 loaded with P30
Not all cars are created equal. Check this out between my OE-tuned C63 vs a Eurocharged tune C63..

Old 10-30-2012, 10:11 PM
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Originally Posted by Jons95c36amg
Not all cars are created equal. Check this out between my OE-tuned C63 vs a Eurocharged tune C63..

http://www.youtube.com/watch?v=rmRtj...layer_embedded
Correction, not all hand built vehicles/engines are made the same. I had someone I know do a dyno run with his stock C55 at the same place I had my C55 dyno'd at long before I had mine done. When I did my first base run, I made 10 more RWHP than he did, and we were both stock. Mine was a bit higher than many stock C55's before I even got the tune, and I still got 20 more RWHP after the tune.
Old 10-30-2012, 10:39 PM
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Some cars are factory freaks.
Old 10-31-2012, 05:49 AM
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Well if this is true, this just about seals my next car choice. I was toying with the idea of trading the C55 for a P-Car or going Audi S-line, but you cannot argue with effin 530 hp in a 4 door everyday runabout. That's what I LOVE about the C55, such an easy and pleasant car to drive around every day to do errands and a real beast when you step on it. The C63 should be even better! 530 HP, ****!
Old 10-31-2012, 09:01 AM
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Originally Posted by xxaarraa
Well if this is true, this just about seals my next car choice. I was toying with the idea of trading the C55 for a P-Car or going Audi S-line, but you cannot argue with effin 530 hp in a 4 door everyday runabout. That's what I LOVE about the C55, such an easy and pleasant car to drive around every day to do errands and a real beast when you step on it. The C63 should be even better! 530 HP, ****!
Yeah man, I hear that. I'm just itching to grab a C63, just want the prices to drop some more ad I'm too cheap (and with too much other debt and priorities!) to buy one now. And it's supposed to get even 'stupider', the next generation C63 is supposed to be using a derivative of the twin turbo V8. Exhaust + tune = rear tires turned into smoke very easily...
Old 10-31-2012, 02:41 PM
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Originally Posted by 91RS
And just use the MAP sensor? That would be interesting. Are you going to post up any information about this process?
Its been done. Rudy has done it several times on C55s using a E55 ECM and basically doing away with the MAF. Its a rewiring of the E55 ECM to make it work on the C55.

Its near impossible, as many have learned, to tune a NA C55 with the limitations of the MAF. Using a new ECM makes all the difference in the world for tuning and this will be my winter project with the boys at Speedriven in Palatine.

Last edited by Newzchspy; 10-31-2012 at 02:45 PM.
Old 10-31-2012, 02:46 PM
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Originally Posted by Saaboteur
Yeah man, I hear that. I'm just itching to grab a C63, just want the prices to drop some more ad I'm too cheap (and with too much other debt and priorities!) to buy one now. And it's supposed to get even 'stupider', the next generation C63 is supposed to be using a derivative of the twin turbo V8. Exhaust + tune = rear tires turned into smoke very easily...
The ONLY C63 I'd be interested in is the P30 with the Limited slip or a P31. These are still fetching in the 40s (or more) and the prices have seemed to leveled off recently.
Old 10-31-2012, 02:48 PM
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Originally Posted by Saaboteur
Yeah man, I hear that. I'm just itching to grab a C63, just want the prices to drop some more ad I'm too cheap (and with too much other debt and priorities!) to buy one now. And it's supposed to get even 'stupider', the next generation C63 is supposed to be using a derivative of the twin turbo V8. Exhaust + tune = rear tires turned into smoke very easily...


and being FI, much easier to "tune."


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