W211 AMG Discuss the W211 AMG's such as the E55 and the E63

E55 dyno numbers question, need help

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Old Jul 15, 2013 | 03:10 AM
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W211 E55
Unhappy E55 dyno numbers question, need help


hi guys, i"m new here.
i got a 04 E55 and i just got a cl55 amg engine installed cause i blowed up my stock engine.
i went to a dyno, and get 411.13whp, and 391.81wtq.
i believe that the torque should be higher than the hp.
anybody knows why?
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Old Jul 15, 2013 | 07:31 AM
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you to Hate
Dyno graph?
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Old Jul 15, 2013 | 11:16 PM
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Originally Posted by RedBullJnky
Dyno graph?

Plus what kind of Dyno did you use?
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Old Jul 16, 2013 | 04:06 AM
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W211 E55
Originally Posted by Manuyc

Plus what kind of Dyno did you use?
i use dynojet
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Old Jul 16, 2013 | 04:08 AM
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W211 E55
Originally Posted by RedBullJnky
Dyno graph?
Attached Thumbnails E55 dyno numbers question, need help-large_yjum_7f73000057e8118f.jpg  
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Old Jul 16, 2013 | 10:19 AM
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What's your AF ratio?
What gear did you dyno?
Did you dyno just once or was this a consecutive run?

I can't see the dyno graph - probably blocked here at work.

It sounds to me like the guy running it either a) didn't dyno the car in the appropriate gear (3rd) or b) started too late in the RPM range -remember, these cars make peak torque 2000-3500 range, and then it tapers off as the RPM rises.



EDIT: Something is definitely wrong as a healthy, stock 55K motor should be making 450+ torque at the wheels..

Last edited by ArmoE55; Jul 16, 2013 at 12:14 PM.
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Old Jul 16, 2013 | 11:22 AM
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What rpm did the pull start at? What gear?
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Old Jul 16, 2013 | 12:07 PM
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Originally Posted by gyimeng
If I can assume that the hp and torque cross at 5252, then he started the pull at 4500rpm which will not give you appropriate results. Maximum torque on these cars happens at around 3000-3500rpm.

You may want to look for a better dyno operator since I'm hoping that isn't the only curve you got...
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Old Jul 16, 2013 | 12:16 PM
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Was the car put into "dyno" mode? Before the dyno pulls? and turned off "dyno" mode when done?
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Old Jul 16, 2013 | 12:17 PM
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Originally Posted by adianaty
If I can assume that the hp and torque cross at 5252, then he started the pull at 4500rpm which will not give you appropriate results. Maximum torque on these cars happens at around 3000-3500rpm.

You may want to look for a better dyno operator since I'm hoping that isn't the only curve you got...
This is what I was getting at. 391ft-lbs at 4500rpm is pretty normal for a stock car. You'll see ~450ft-lbs between 2500-3500rpm.
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Old Jul 16, 2013 | 12:43 PM
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Originally Posted by SterlingE55
This is what I was getting at. 391ft-lbs at 4500rpm is pretty normal for a stock car. You'll see ~450ft-lbs between 2500-3500rpm.
But the torque line appears to drop off the lower you go back in the rpms?
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Old Jul 16, 2013 | 03:01 PM
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Originally Posted by HeissRod
But the torque line appears to drop off the lower you go back in the rpms?
My guess is that the throttle got rolled into it and the car typically retards timing on tip in of the throttle. Once again, this dyno operator may not be the best...
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