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Air Suspension no longer lowers at highway speeds (FW update v5.8)
- Thread starter Lump
- Start date
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- Driving Dynamics Model S
Would you mind providing the research to make such a statement? Because such a change effects the aerodynamic drag (along with the handling) stating such a generalized percent simply is not possible. Perhaps you meant 2% at 40 mph? If that were true, wouldn't that mean that it's 8% at 80 mph? To the person who only travels at 40mph, it might not matter at all, yet to the person traveling at 80 mph, well I think they care just a little more.
Peter
Peter
JRP3
Hyperactive Member
At some point I'm sure it will get better, it just got a little worse in the mean time :wink:
JRP3
Hyperactive Member
Except I don't think anyone has reported noticeable range loss after lowering was disabled. I don't think the extra inch matters much since air still flows under the vehicle, and the frontal area is not really increased.
Peter had it correct originally. He did not say 4% at 80, he said 8%. This is consistent with doubling the speed squaring that and then multiplying by 4 to get 8%.
gnelson
Member
JRP3
Hyperactive Member
You would be correct. Maybe you could post real world measurements of energy consumption from a car with and without lowering under the same conditions and disprove my unscientific conclusion that the extra inch does not matter much.
JRP3
Hyperactive Member
Unless someone had data from before the change to compare with. Obviously exact same conditions would be improbable, but similar conditions would be possible since people often drive the same routes. As far as I know no one has reported a noticeable change in energy consumption that can be traced to the height change.
Kraken
Member
Alright, quick, who has an indoor track and two nealy identical model s's, one that has been updated and one that hasn't. They need to be the same battery pack type and quality (both a, or both b). Someone is wrong on the Internet, and we need to figure out who it is.
i will say, being an engineer, there most likely is a performance loss. The question is how negligible. I was originally more concerned about this loss, but from the experiences of others and my own, I would say it has seem to be slight. It seems to be Much less than other daily factors, that's for sure.
i will say, being an engineer, there most likely is a performance loss. The question is how negligible. I was originally more concerned about this loss, but from the experiences of others and my own, I would say it has seem to be slight. It seems to be Much less than other daily factors, that's for sure.
My lifetime Wh/mi has ticked up by 2 from 331 before 5.8 to 333 now. Whether that's due to the suspension or environmental factors I cannot say, but it has been a very mild winter here is So Cal.
Check your tire pressures! A few lbs. low in pressure makes a noticable difference in energy usage.
JRP3
Hyperactive Member
I wish Tesla was already doing this kind of stuff. They have the means and at least some of its current and future customers actually care about the real impact of such changes.
The adjustable lowering links could easily be used for this test.
The bigger issue would be any potential changes in alignment as a result of the difference in ride height. If toe changes at all, that would definitely have an effect on range/efficiency.
You can bet that they have done this stuff - the question is why haven't they posted the results.
deonb
Active Member
Lose-lose proposal for Tesla. Either:
a) It makes a difference and they upset all air suspension customers that feel like they had a feature removed.
b) It makes no difference and they upset all air suspension customers that feel like they paid for a feature that didn't really exist.
