Sivi70980
Well-Known Member
- Joined
- Feb 28, 2019
- Threads
- 17
- Messages
- 2,501
- Reaction score
- 4,179
- Location
- Lacey, Washington
- First Name
- Mark
- Vehicle(s)
- 2019 Ruby Red GT PP1 M6
The one time I had my Mini on a dyno, all I could think about was all the fail videos I've seen. A lot of forces at work there. Almost like a stampede of horses...It's up to the dyno operator to make the corrections for driveline losses. I think that the trends you see are the result of people operating under the assumption of far larger driveline losses than are actually present. If you adjust for 20%+ losses (old school drivelines) vs. the actual ~12-15% (modern efficient driveline) it's going to look like the manufacturer "underrated" the engine. You can also run the same car on different types of dyno, or even just different brands, and get a different result. There's just too many variables that can't be or aren't properly controlled when getting chassis dyno numbers. The only real dyno measurement you can trust is an engine dyno, run using the SAE standards for testing. Those numbers need to be accurately published within a 1% margin of error.