What is the percentage of our drivetrain loss?
01-18-2009, 09:26 AM
#11
Ummmm.....Interesting math........
If you assume that the A8 mentioned is a 40 valve with 310 BHP at the engine, then:
[(310-266)/310]*100= 14.19%
This sounds low to me; I'd like to see the Dyno plots of the 266 WHP A8.
[(310-266)/310]*100= 14.19%
This sounds low to me; I'd like to see the Dyno plots of the 266 WHP A8.
01-18-2009, 10:51 AM
#12
Must be a 32V engine- you can really see the intake manifold changeover (one not two).....
Getting an all-wheel drive with automatic transmission to only lose 14% in drive train losses is pretty good. Here at 6100 ft. altitude I'm sure I'm losing quite a lot of power- I wonder how much? Hmmmm. Dyno day?
Upon further examination, the peak power looks like 256 HP: ((300-256)/300)*100 = 14.7% loss from factory specification for the 32V engine.
Upon further examination, the peak power looks like 256 HP: ((300-256)/300)*100 = 14.7% loss from factory specification for the 32V engine.
01-18-2009, 06:52 PM
#15
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The dyno sheet is incorrect .. a typo .. my car's a 99 and that's my dyno run.
It says 1998 on the sheet.
Let me just point out here that Dynomometers out in the field vary wildly with each other and even from day to day .. heat, humidity etc ...
I could go back to that place a week later and the numbers would be different. When you dyno tune a car, you do it all over several hours so the numbers can be compared reasonably.
Let me just point out here that Dynomometers out in the field vary wildly with each other and even from day to day .. heat, humidity etc ...
I could go back to that place a week later and the numbers would be different. When you dyno tune a car, you do it all over several hours so the numbers can be compared reasonably.
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