True measured performance
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From: Behind the wheel
The best or nothing
True measured performance
Have you dynoed your car?
If so, what hp/tq did you get?
I sent my E55 to dyno and got these results..
Hp: 341.8
Nm: 455
I later found out the gear mode selector was switched to W mode. Can this be the reason why the performance was slighly limited?
Everything else on the car is close to factory/mint condition.
If so, what hp/tq did you get?
I sent my E55 to dyno and got these results..
Hp: 341.8
Nm: 455
I later found out the gear mode selector was switched to W mode. Can this be the reason why the performance was slighly limited?
Everything else on the car is close to factory/mint condition.
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Yeah and I used Natural 95 RON petrol this time so the lowest octane rating possible (you can buy 98 RON or 100 RON in Europe).
Last edited by Jan AMG; Sep 9, 2016 at 01:50 AM.
Thread Starter
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From: Behind the wheel
The best or nothing
Hi, thanks for your input. Californian 91 AKI equals European 95 RON.
https://en.m.wikipedia.org/wiki/Octane_rating
I will try another dyno with 100 RON and see difference it makes.
https://en.m.wikipedia.org/wiki/Octane_rating
I will try another dyno with 100 RON and see difference it makes.
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Joined: Oct 2014
Posts: 133
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From: Winnipeg, MB, Canada
'99 E55t AMG
Starting in "W" mode would only mean the trans would start off in 2nd gear, rather than 1st. I assume you'd be doing your dyno run in 4th gear, so that shouldn't make any difference to your results.
As your dyno results would be "at the wheels" you would expect there to be driveline loss to the tune of 20% or so for an auto (just a guess), if that figure is in the right ballpark that would put your HP if stock at just over 280hp. Your figures are much stronger than that, so you're either pretty heavily modified, or there's been some "tinkering" with the dyno calibration to get the figures you're seeing, perhaps trying to convert to a flywheel hp level (as the engine is rated from factory).
Great pics on the dyno btw, car looks amazing!
As your dyno results would be "at the wheels" you would expect there to be driveline loss to the tune of 20% or so for an auto (just a guess), if that figure is in the right ballpark that would put your HP if stock at just over 280hp. Your figures are much stronger than that, so you're either pretty heavily modified, or there's been some "tinkering" with the dyno calibration to get the figures you're seeing, perhaps trying to convert to a flywheel hp level (as the engine is rated from factory).
Great pics on the dyno btw, car looks amazing!
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Hi Ian, thanks. You made me learn more about it.
The driveline loss is calculated by the dyno system. It should be 15% (auto + RWD).
If you would add this to my current output I'd have over 400hp and my car is bone stock so that is not possible.
The dyno guys told most of the atmospheric engines eg. M273 500 V8 should have 388hp but they measure around 350hp, even 330hp. On the other hand, most of turbo charged engines get exact factory values, even up to 10% more.
I will do another test run in the next week, this time with a better fuel.
The driveline loss is calculated by the dyno system. It should be 15% (auto + RWD).
If you would add this to my current output I'd have over 400hp and my car is bone stock so that is not possible.
The dyno guys told most of the atmospheric engines eg. M273 500 V8 should have 388hp but they measure around 350hp, even 330hp. On the other hand, most of turbo charged engines get exact factory values, even up to 10% more.
I will do another test run in the next week, this time with a better fuel.
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Joined: Oct 2014
Posts: 133
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From: Winnipeg, MB, Canada
'99 E55t AMG
I think you'll find the actual driveline loss on these cars is much higher than 15%, I'd believe that for a manual transmission. Our cars are likely more like 25%. These transmissions are pretty beefy, they use them behind the V12's as well, but I think they suck up a lot of the power in the process of getting it to the wheels. Here's a great link I found:
http://www.superstreetonline.com/how...in-power-loss/
http://www.superstreetonline.com/how...in-power-loss/
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Member
Joined: Nov 2014
Posts: 181
Likes: 7
From: Dallas, TX
1999 E55 AMG, 2004 Big Turbo A4; 2005 C240 Wagon 4matic; 2003 G500; 2013 Sprinter 172
I think you'll find the actual driveline loss on these cars is much higher than 15%, I'd believe that for a manual transmission. Our cars are likely more like 25%. These transmissions are pretty beefy, they use them behind the V12's as well, but I think they suck up a lot of the power in the process of getting it to the wheels. Here's a great link I found:
http://www.superstreetonline.com/how...in-power-loss/
http://www.superstreetonline.com/how...in-power-loss/
