W211 AMG Discuss the W211 AMG's such as the E55 and the E63
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What does the w211 really produce at the crank? 493hp?

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Old 06-21-2004, 11:58 AM
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2014 E63S; AMS 100 octane ecu tune; edok tcu tune; BB intakes; dyno tuned
What does the w211 really produce at the crank? 493hp?

I've heard and read differing opinions on this. Some say it's underrated, whilst others think it's dead-on.
Old 06-21-2004, 01:21 PM
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Re: What does the w211 really produce at the crank? 493hp?

Originally posted by PeterUbers
I've heard and read differing opinions on this. Some say it's underrated, whilst others think it's dead-on.
Several dyno tests have shown that E55 motor is producing upwards of 500 crank hp most showing around 520.
Old 06-21-2004, 01:54 PM
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Mine did 400rwh with a bad water pump.
400x1.2=480 to the crank, I am not sure about the conversion. But it's what I've heard.

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Old 06-21-2004, 02:49 PM
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Originally posted by E55 POWER
Mine did 400rwh with a bad water pump.
400x1.2=480 to the crank, I am not sure about the conversion. But it's what I've heard.

Regards,
E55 POWER
Multiplying RWHP * 1.2 is not the correct form of conversion considering 20% drivetrain loss. The correct way to convert RWHP is this: RWHP / .80

Evosport dyno'd a stock E55 - there's a thread about it on the forums about it - I believe they dyno'd at around 520 crank.
Old 06-21-2004, 05:02 PM
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Evosports dyno numbers tend to be a little higher than seen on other dynos. The E55's produce around 15rwhp less than the S/SL55's on average from what I have seen. I think the numbers are dead on.
Old 06-22-2004, 12:23 AM
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2004 E55
Originally posted by stephens
Evosports dyno numbers tend to be a little higher than seen on other dynos. The E55's produce around 15rwhp less than the S/SL55's on average from what I have seen. I think the numbers are dead on.
Most E55's dyno around 405RWHP or slightly more in stock form. Assuming 20% drivetrain loss, that's 506 HP at the crank. If you assume 18% drivetrain loss as some have stated that Mercedes claims, then it's 493.9 HP at the crank, exactly the same as they claim for the SL55.
Old 06-22-2004, 12:27 AM
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Click here for a very conservative estimate469 but it keeps the rustangs from tailgate en.
Old 06-22-2004, 12:32 AM
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Old 06-22-2004, 12:36 AM
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Originally posted by stephens
Evosports dyno numbers tend to be a little higher than seen on other dynos. The E55's produce around 15rwhp less than the S/SL55's on average from what I have seen. I think the numbers are dead on.
I have actually had my CLK dyno'd by Evosport and 2 other independent shops. The other shop using a Dynojet netted almost the exact same numbers. The other shop that used a Dynapak dyno netted 3 hp less at the rear wheel.

As for what the E55 really puts out at the crank.... all that matters is what it puts out the rear wheel. Pick a drivetrain loss % and you can pretty much make it whatever you want. I usually use 15 - 17%, but I don't think anyone on this board knows what it really is
Old 06-22-2004, 12:41 AM
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amg told me over the phone that its 18% loss.
Old 06-22-2004, 11:07 AM
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2014 E63S; AMS 100 octane ecu tune; edok tcu tune; BB intakes; dyno tuned
It's very impressive, nonetheless.

Thanks for the informative replies.
Old 06-23-2004, 03:45 PM
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Originally posted by dgussin1

Is this dyno sheet for a stock E55K? The torque is 586 lb/ft when converted to crank, using 18%. Is the torque that underrated, too?
Old 06-23-2004, 03:52 PM
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2004 E55
Originally posted by Micah
Is this dyno sheet for a stock E55K? The torque is 586 lb/ft when converted to crank, using 18%. Is the torque that underrated, too?
Yes.
Old 06-23-2004, 03:58 PM
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2003 CL55 AMG
Using a 18% loss factor,

422.7 RWHP equates to 515 Crank HP.

481.3 RWTQ equates to 586 Crank TQ.


RWHP / 82 * 100 = x



I have been told DynoJet's sometimes show approx 10% greater #'s than in reality.

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