Theoretical Top Speed for C63
07-15-2009, 11:29 AM
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2009 C63 AMG / 2009 Nissan GT-R / 1988 Ferrari 328 / 1977 Maserati Bora
Theoretical Top Speed for C63
There was a thread some time ago regarding the top speed of a C63. It got me thinking and I compiled some data using some admittedly gross assumptions.
Using a GTR because I have one and MT has data on the car, I extrapolated the required crank HP required for me to achieve a particular top speed in my C63.
AERO HP drag = Cd * FA * V^3 / 150,000
Admittedly here are the flaws...
The frontal area and Cd are known for the GTR. For the C63 I obtained a twice printed C63 Cd and estimated the Frontal Area using a telephoto lens took a picture of my C63 in comparison to a picture of my GTR. The results are not particularly sensitive to FA, so the results shouldn't be way off.
The driveline losses are estimated. I used 15% for the RWD C63 and 17.5% for the AWD GTR. Most HP numbers are my own car / MT tests.
Biggest weakness is that I estimated the Other Losses to plug for the GTR crank HP and then used that number for the C63 to get crank HP.
However, if my math is right I'm not far off IMHO.
DISCLAIMER...
I own and love both cars, make no representations regarding stability at any such speeds. Additionally, I endorse a "take to the track you idiot" mentality.
Regards and let the flames begin,
Ron
Using a GTR because I have one and MT has data on the car, I extrapolated the required crank HP required for me to achieve a particular top speed in my C63.
AERO HP drag = Cd * FA * V^3 / 150,000
Admittedly here are the flaws...
The frontal area and Cd are known for the GTR. For the C63 I obtained a twice printed C63 Cd and estimated the Frontal Area using a telephoto lens took a picture of my C63 in comparison to a picture of my GTR. The results are not particularly sensitive to FA, so the results shouldn't be way off.
The driveline losses are estimated. I used 15% for the RWD C63 and 17.5% for the AWD GTR. Most HP numbers are my own car / MT tests.
Biggest weakness is that I estimated the Other Losses to plug for the GTR crank HP and then used that number for the C63 to get crank HP.
However, if my math is right I'm not far off IMHO.
DISCLAIMER...
I own and love both cars, make no representations regarding stability at any such speeds. Additionally, I endorse a "take to the track you idiot" mentality.
Regards and let the flames begin,
Ron
07-15-2009, 12:32 PM
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R8
Thanks for doing all that work, Ron.
Very interesting data indeed. I wonder if the drivetrain loss you're using for both the C63 and the GT-R might be a bit off. I recall most of us here are accepting 17% or even 18% as the drivetrain loss for the C63, and I would suspect the drivetrain loss on an AWD car like the GT-R might be even upwards of 20%, although I could be wrong about that.
In any case, an excellent topic for discussion.
Very interesting data indeed. I wonder if the drivetrain loss you're using for both the C63 and the GT-R might be a bit off. I recall most of us here are accepting 17% or even 18% as the drivetrain loss for the C63, and I would suspect the drivetrain loss on an AWD car like the GT-R might be even upwards of 20%, although I could be wrong about that.
In any case, an excellent topic for discussion.
07-15-2009, 12:39 PM
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2014 CTS-V (6spd, phantom grey), 2010 Cadillac Escalade ESV (black raven)
Has anyone de-limited their C63? Is this even available?
If so, go to an airfield and find out...
If so, go to an airfield and find out...
02-07-2010, 10:32 PM
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M156 and LS7
02-07-2010, 10:39 PM
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2011 GLK 350, 2013 GT-R, & 2013 RAM 1500
The Lorinser C LV8 (a 500-hp Mercedes-Benz C63 AMG) reached 194.6 mph in last year's Nardo High-Performance Event.
Article here -> http://www.motortrend.com/features/p...t/results.html
Article here -> http://www.motortrend.com/features/p...t/results.html
02-08-2010, 01:15 AM
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02-08-2010, 11:14 AM
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08 C63, 07 ML63, 92 500E, 70 300SEL 6.3, 63 220 SEB Conv. Sold 02 G500, 97 E50,92 C280,71 280SE 4.5
I did this 8 days ago, car had an ECU flash/delimit from upsolute dyno showed a modest 10 to 15 RWHP increase. Thanks
02-08-2010, 02:38 PM
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who took the pic?
02-08-2010, 07:39 PM
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2014 Audi RS7
You will need far more than an airfield. You can only reach 165 to 170 within one mile from a stand still. If the car is heavily modded you can reach the 180's but in order to reach a top speed you are going to need a long straight road. Be safe!!
02-09-2010, 08:11 AM
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08 C63, 07 ML63, 92 500E, 70 300SEL 6.3, 63 220 SEB Conv. Sold 02 G500, 97 E50,92 C280,71 280SE 4.5
Actually I did take the picture myself. There is a brand new highway here that is trully world class, and on a sunday morning its pretty empty. It's also a testament as to how stable a car this is at speed 
Did this too with my ML and My E50 before I sold it.
Did this too with my ML and My E50 before I sold it.
02-09-2010, 06:52 PM
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RS4 B5-C63 amg-SL 63 amg
