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by electronchaser
Tue Feb 25, 2020 9:00 pm
Forum: Technical BMW i3 Discussions
Topic: Parachute effect, underside of vehicle, undesirable
Replies: 8
Views: 325

Re: Parachute effect, underside of vehicle, undesirable

One person's parachute effect is another person's low pressure cavity for developing under-tray downforce..... wouldn't the faster air, with less pressure creating an area of low pressure between the vehicle and road surface, sucking the vehicle to the road. Instead, in its current form it creates ...
by electronchaser
Mon Feb 24, 2020 8:10 pm
Forum: Technical BMW i3 Discussions
Topic: Parachute effect, underside of vehicle, undesirable
Replies: 8
Views: 325

Re: Parachute effect, underside of vehicle, undesirable

But I do really think the opening was designed to provide cooling to the ICE and associated components. That would be a reasonable explanation if all i3's had ICE's. It would have been easy for BMW to have blocked off this opening on the many BEV's being sold, but it didn't happen. So there must be...
by electronchaser
Mon Feb 24, 2020 3:20 pm
Forum: Technical BMW i3 Discussions
Topic: Parachute effect, underside of vehicle, undesirable
Replies: 8
Views: 325

Re: Parachute effect, underside of vehicle, undesirable

I've seen this opening myself, and wondered the same. However, I can't imagine that the Bavarian Aerodynamikers in charge of this project missed this little detail? Regarding road noise, I will tell you this: I've driven a few trips with the cover removed, and the electric motor is incredibly loud....
by electronchaser
Mon Feb 24, 2020 3:06 pm
Forum: Problems / Troubleshooting
Topic: DCFC Level 3 charging not reliable
Replies: 18
Views: 1348

Re: DCFC Level 3 charging not reliable

Might be more of an issue with older models. Since taking delivery, I've done over 5000miles of dcfc-ing, with a 98% success rate, and the one two errors I got were from the DCFC unit and not the vehicle. Haven't been stranded once, and I discharge the battery a lot. I think if reliability was an is...
by electronchaser
Mon Feb 24, 2020 3:02 pm
Forum: Technical BMW i3 Discussions
Topic: Junkyard Wheel, Wrong Size! :(
Replies: 3
Views: 160

Re: Junkyard Wheel, Wrong Size! :(

not really a bummer if you can find one more 175 and then use one of the old 155 fronts as an all around spare. But yes a 10mm spacer will keep from contact on full lock of steering wheel. The spacers are highly recommended. After fitting 15mm spacers at each corner I found every aspect of the suspe...
by electronchaser
Sat Feb 22, 2020 4:14 pm
Forum: Technical BMW i3 Discussions
Topic: Parachute effect, underside of vehicle, undesirable
Replies: 8
Views: 325

Parachute effect, underside of vehicle, undesirable

Not sure how many people have gotten under the car to take a look, but my BEV has a rather large triangular cut out below the motor area all the way to the end of the battery pack. I thought it might be for cooling, then remembered our motors are cooled by sealed looped refrigerant. Anyway I don't s...
by electronchaser
Thu Feb 20, 2020 4:35 pm
Forum: Technical BMW i3 Discussions
Topic: DC fast charging update after 3500miles
Replies: 5
Views: 224

Re: DC fast charging update after 3500miles

DC fast charging a 120 Ah battery pack would be considerably less damaging than doing so with a 60 Ah battery pack. The charging power of a 120 Ah battery pack would be ~1C compared with ~2C on a 60 Ah battery pack, C being the charging power required to charge a battery cell from 0 to 100% in 1 ho...
by electronchaser
Wed Feb 19, 2020 4:18 pm
Forum: Technical BMW i3 Discussions
Topic: DC fast charging update after 3500miles
Replies: 5
Views: 224

DC fast charging update after 3500miles

Lots of people ask about battery life, degradation, charge times, etc. both on the forums and in real life. Thought I'd keep track of things for a while and provide some info for current/future owners. Having used 50kW DCFC, for a while, I think its more than enough power and speed for me, and I'm p...
by electronchaser
Wed Feb 19, 2020 4:15 am
Forum: Suggestions for BMW
Topic: Including battery wear level in Used I3 listings
Replies: 9
Views: 287

Re: Including battery wear level in Used I3 listings

I just bought mine yesterday and never even thought of battery health! The original 60 Ah battery packs seem to be the ones whose health could be failing. 94 Ah battery packs like that in your i3 seem to be doing much better in general. So I wouldn't worry if I were you. Ya, like Art said, your new...

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