C32 AMG, C55 AMG (W203) 2001 - 2007

Can anyone help me make heads or tails of this???

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Old Oct 13, 2008 | 01:37 PM
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Can anyone help me make heads or tails of this???

Had an AMG Dyno day in Stuttgart today. There were about 7 or 8 cars including: 2 x C32, 1 X CLK55, 2 X C63, G Wagon, and 1 x E55 cant remember the rest. Awesome cars and awesome folks. Thanks Ralf (German32er) for setting it up. That being said, I cant for the life of me figure out what im looking at. If someone can help with a URL to a conversion chart or tell me RWHP and RWTQ. Also how does my A/F look? Temps were about 71 Deg.
Thanks in advance.
Attached Thumbnails Can anyone help me make heads or tails of this???-dyno1-13-oct-08.jpg   Can anyone help me make heads or tails of this???-dyno-13-oct-08.jpg  

Last edited by mdncn2762; Oct 13, 2008 at 01:47 PM. Reason: added pics
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Old Oct 13, 2008 | 01:57 PM
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C55,SL55,C63
Originally Posted by mdncn2762
Had an AMG Dyno day in Stuttgart today. There were about 7 or 8 cars including: 2 x C32, 1 X CLK55, 2 X C63, G Wagon, and 1 x E55 cant remember the rest. Awesome cars and awesome folks. Thanks Ralf (German32er) for setting it up. That being said, I cant for the life of me figure out what im looking at. If someone can help with a URL to a conversion chart or tell me RWHP and RWTQ. Also how does my A/F look? Temps were about 71 Deg.
Thanks in advance.
Looks like your torque is in Newton Meters and HP is in Killowats

If your KW is 290 that means you have 388HP

1HP = 0.7456KW

Not sure that the newton meters are to torque but its much less than 525
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Old Oct 13, 2008 | 02:02 PM
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It looks like 392 hp and 393 ft/lbs of torque, calculated from the 398 DIN and 534 Nm values in you graph.

IIRC, the multiplier for NM to Ft/lbs is 0.7376 and DIN to SAE divisor is 1.013

Healthy numbers. Who tuned your car?
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Old Oct 13, 2008 | 02:06 PM
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Originally Posted by ChicagoX
It looks like 392 hp and 393 ft/lbs of torque, calculated from the 398 DIN and 534 Nm values in you graph.

IIRC, the multiplier for NM to Ft/lbs is 0.7376 and DIN to SAE divisor is 1.013

Healthy numbers. Who tuned your car?
i came up with 387tq as well but I thought my math was wrong guess not.

How much HP and tq you have will be based on a solid number So I was just ballparking from the graph.
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Old Oct 13, 2008 | 02:08 PM
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Jerry/ LET tuned it. Are we talking to the wheels here? It seems high to me but im not complaining.. Should I subtract 17% for the drivetrain?
Originally Posted by ChicagoX
It looks like 392 hp and 393 ft/lbs of torque, calculated from the 398 DIN and 534 Nm values in you graph.

IIRC, the multiplier for NM to Ft/lbs is 0.7376 and DIN to SAE divisor is 1.013

Healthy numbers. Who tuned your car?

Last edited by mdncn2762; Oct 13, 2008 at 02:44 PM.
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Old Oct 13, 2008 | 03:05 PM
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From: FT POLK LOUISIANA
1992 Toyota Corolla, 1994 Chevy C1500, 2002 C32, 2012 Prius, 2013 Toyota Sienna
Past Dyno

So....Old Dyno with non-LET tune and same mods made Max 316 RWHP/ 331 RWTQ.
New Dyno with LET tune and same MODS made 325.9 RWHP and 326.87 RWTQ assuming 17% drivetrain loss.
I lost some TQ and gained some HP? Is this a DynoJet VS Superflow Dyno thing? Weather/ Temp maybe.
Attached Thumbnails Can anyone help me make heads or tails of this???-old-dyno.jpg  

Last edited by mdncn2762; Oct 13, 2008 at 03:09 PM.
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Old Oct 13, 2008 | 05:17 PM
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Originally Posted by mdncn2762
Had an AMG Dyno day in Stuttgart today. There were about 7 or 8 cars including: 2 x C32, 1 X CLK55, 2 X C63, G Wagon, and 1 x E55 cant remember the rest. Awesome cars and awesome folks. Thanks Ralf (German32er) for setting it up. That being said, I cant for the life of me figure out what im looking at. If someone can help with a URL to a conversion chart or tell me RWHP and RWTQ. Also how does my A/F look? Temps were about 71 Deg.
Thanks in advance.
http://www.onlineconversion.com/torque.htm

http://www.onlineconversion.com/power.htm

Sorry bud, I can't figure out that dyno graph for the life of me... but it does appear that you're at 393 hp (292.8 kW) and 394 tq (534 Nm).

If that's at the wheels, you have one of (if not the) strongest "all-motor" C32's in the world. Could their software have been performing a "crank-conversion" calculation?
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Old Oct 13, 2008 | 11:48 PM
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LET C32 2002
To my understanding those numbers are for the rear wheel so add 17% to find out crank HP/TQ...very healthy
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Old Oct 14, 2008 | 08:27 AM
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Originally Posted by c32used
To my understanding those numbers are for the rear wheel so add 17% to find out crank HP/TQ...very healthy
But if the only power-producing mods are ASP pulley and LET tune, don't the numbers seem a tad high for rwhp/rwtq?
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Old Oct 14, 2008 | 09:16 AM
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I've seen C32's dyno over 400 at the wheels.

Mark - What kind of fuel is in the car?
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Old Oct 14, 2008 | 10:43 AM
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Originally Posted by mdncn2762
Had an AMG Dyno day in Stuttgart today. There were about 7 or 8 cars including: 2 x C32, 1 X CLK55, 2 X C63, G Wagon, and 1 x E55 cant remember the rest. Awesome cars and awesome folks. Thanks Ralf (German32er) for setting it up. That being said, I cant for the life of me figure out what im looking at. If someone can help with a URL to a conversion chart or tell me RWHP and RWTQ. Also how does my A/F look? Temps were about 71 Deg.
Thanks in advance.
Hello Mark,

seems you had a very good time at Hennies. Maybe the next time I will come too, when I am not so busy at work.

Chicago X and C32 AMG-DTM converted the HP correctly. The Graph shows 292 DIN-KW (398 HP at the crank/motor) and 534 NM (398 Lbft) at the crank. And Lambda 0,83 is approx. 12,09 A/F.

Regards Bruno

Last edited by AMG-Driver; Oct 14, 2008 at 10:52 AM.
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Old Oct 14, 2008 | 12:09 PM
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LET C32 2002
Originally Posted by c32AMG-DTM
But if the only power-producing mods are ASP pulley and LET tune, don't the numbers seem a tad high for rwhp/rwtq?
Yes correct............but there are variable so I'm going by that
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Old Oct 14, 2008 | 01:05 PM
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From: FT POLK LOUISIANA
1992 Toyota Corolla, 1994 Chevy C1500, 2002 C32, 2012 Prius, 2013 Toyota Sienna
Normal 93 octane (American not German). DynoFlow All Wheel Dyno. 71 Deg. Dyno Mode. Massive fan.
Originally Posted by LETMotorsports
I've seen C32's dyno over 400 at the wheels.

Mark - What kind of fuel is in the car?
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Old Oct 14, 2008 | 01:10 PM
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From: FT POLK LOUISIANA
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Yes next time. I want to see what your slk32 is putting down. Isnt there a Dyno near Nurnberg? Its 2 hours to drive to Henniesy(Stuttgart) for me.

Originally Posted by AMG-Driver
Hello Mark,

seems you had a very good time at Hennies. Maybe the next time I will come too, when I am not so busy at work.

Chicago X and C32 AMG-DTM converted the HP correctly. The Graph shows 292 DIN-KW (398 HP at the crank/motor) and 534 NM (398 Lbft) at the crank. And Lambda 0,83 is approx. 12,09 A/F.

Regards Bruno
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Old Oct 14, 2008 | 01:16 PM
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From: FT POLK LOUISIANA
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All

Is it safe to say that I dynoed at 325.9 RWHP and 326.87 RWTQ?
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Old Oct 14, 2008 | 02:55 PM
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Originally Posted by mdncn2762
Is it safe to say that I dynoed at 325.9 RWHP and 326.87 RWTQ?
From Bruno's comments, I'd say that's safe to say.

If the dyno was somehow adding in a driveline loss assumption, you'd have to take that back out to get the numbers at the wheels.

398/398 at the crank would be 326/326 @ the wheels, assuming 18% driveline losses
398/398 at the crank would be 330/330 @ the wheels, assuming 17% driveline losses

healthy numbers either way - I'm only putting down a bit higher, and I have a similar (or same) tune, 181mm crank pulley, and headers.
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Old Oct 15, 2008 | 11:32 AM
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I was hoping for 350 RWHP. 350 was the trigger on getting new brakes, wheels and tires. Now I have to wait on the brakes, wheels and get a larger pulley. What else can I do but get a larger pulley?
Originally Posted by c32AMG-DTM
From Bruno's comments, I'd say that's safe to say.

If the dyno was somehow adding in a driveline loss assumption, you'd have to take that back out to get the numbers at the wheels.

398/398 at the crank would be 326/326 @ the wheels, assuming 18% driveline losses
398/398 at the crank would be 330/330 @ the wheels, assuming 17% driveline losses

healthy numbers either way - I'm only putting down a bit higher, and I have a similar (or same) tune, 181mm crank pulley, and headers.
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Old Oct 15, 2008 | 06:25 PM
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Originally Posted by mdncn2762
I was hoping for 350 RWHP. 350 was the trigger on getting new brakes, wheels and tires. Now I have to wait on the brakes, wheels and get a larger pulley. What else can I do but get a larger pulley?
The only other major alternative is to slap a smaller S/C pulley on, ideally with a belt-wrap kit. Might require a retune for the added boost, but should place you at (or above) your 350 rwhp goal. Appears to be some conjecture on MBW that C3P will have the items you seek in short order... might want to PM Aaron or Brandon.

Other things to consider would be addressing bottlenecks on the intake and/or exhaust side...

GL mdncn... I'll probably be pursuing similar mods in the near future; will let you know my results if/when I do.
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Old Oct 15, 2008 | 06:41 PM
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LET C32 2002
I say play it safe and get a 185mm pulley maybe headers also and I can see based off your dyno that 350 whp will be very possible...I read Jerry(LET) say that the 181/185 he will try hard to keep alive..also the headers.....

VRP is selling headers right now for $899.
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