Quote:
Originally Posted by Vekke
I did also pressure testing in my electric ID3 at 100km/h speed with 195/55r20 Nokian Hakkapeliitta R2 winter tires. There optimal pressure was not higher than recommended. I found optimal pressure is around 2,5 bar.
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Just curious about the methodology:
- What are the units of the measured values?
- How long (time or distance) was each measurement taken?
- Were bi-directional runs averaged together?
- Have you loaded the data into a spreadsheet to generate graphs?
In my Prius days, I typically tested at ~65 mph (104 kph.) My interest was in tire tread temperature measured using a hand held IR thermometer. I would typically drive ~8-16 km; stop the car on an exit ramp shoulder, and; measure tread temperatures recorded with cell phone video.
The reason I ask is the prospect of replicating your methodology with my Std Rng Plus Model 3. Only my interest is in using the tire pressure and temperature sensors in each tire (requires an independent sensor receiver.)
My uncalibrated fingers and increases in pressure reported by the car suggest the tires are running warmer than I want. Heat is the signature of energy loss.
Thanks,
Bob Wilson