bwilson4web
Posts: 692
Joined: Fri Apr 29, 2016 11:59 pm
Location: Huntsville, AL

Benchmarks: 2014 BMW i3-REx and Standard Range Plus Model 3

Tue Apr 16, 2019 3:43 am

I ran three, bidirectional, benchmarks using a dash cam on a fairly flat, paved road on the west boundary with the airport. I then transcribed the GPS time, latitude, and speed
Image
Surprising results:
  • Nearly identical acceleration to 65-70 mph
  • 2014 BMW i3-REx is speed limited to ~90 mph
  • 2014 BMW i3-REx performance the same in EV or with Rex running
The SRM3+ acceleration is set to 'Chill' versus 'Standard' so I need to compare these modes. Furthermore, there are other options like 'traction control' that may affect acceleration rate. Finally, I did not try to launch either car by holding the brake, full press the accelerator, and release the brake. However, I may wait until the GPS mouse arrives and add high resolution accelerometer data.

My primary interest is in getting a net HP reading for both cars. I had used a maximum hill climb with the SRM3+ but initial results indicated a maximum of ~160 hp. This and earlier data suggests hp is limited up to about 70 mph. I suspect that road measured hp metrics requires speeds above 70 mph for each vehicle.

Bob Wilson
20k/27k mi 2014 BMW i3-REx
10k/10k mi 2017 Prius Prime

gt1
Posts: 312
Joined: Sat Nov 07, 2015 7:31 pm
Location: Baltimore

Re: Benchmarks: 2014 BMW i3-REx and Standard Range Plus Model 3

Tue Apr 16, 2019 8:00 am

Hmm, quick googling found this:
Image
Your M3 is way slower than advertised.

alohart
Posts: 1615
Joined: Sat Nov 01, 2014 7:36 pm
Location: Honolulu, HI

Re: Benchmarks: 2014 BMW i3-REx and Standard Range Plus Model 3

Tue Apr 16, 2019 11:43 am

gt1 wrote:
Tue Apr 16, 2019 8:00 am
Your M3 is way slower than advertised.
I'm guessing that this is due to chill mode.
Aloha,
Art

2014 BMW i3 Arravani Grey, Giga World, Tech + Driving Assist, Parking Assist, DC Fast Charging, JuiceBox EVSE

bwilson4web
Posts: 692
Joined: Fri Apr 29, 2016 11:59 pm
Location: Huntsville, AL

Re: Benchmarks: 2014 BMW i3-REx and Standard Range Plus Model 3

Tue Apr 16, 2019 4:14 pm

alohart wrote:
Tue Apr 16, 2019 11:43 am
gt1 wrote:
Tue Apr 16, 2019 8:00 am
Your M3 is way slower than advertised.
I'm guessing that this is due to chill mode.
That is the consensus in the Model 3 user forum. I'm waiting for the GPS mouse before doing any more tests. FYI, I also had the BMW i3-REx in "Eco Pro" mode too.

Bob Wilson
20k/27k mi 2014 BMW i3-REx
10k/10k mi 2017 Prius Prime

alohart
Posts: 1615
Joined: Sat Nov 01, 2014 7:36 pm
Location: Honolulu, HI

Re: Benchmarks: 2014 BMW i3-REx and Standard Range Plus Model 3

Tue Apr 16, 2019 8:25 pm

bwilson4web wrote:
Tue Apr 16, 2019 4:14 pm
FYI, I also had the BMW i3-REx in "Eco Pro" mode too.
My sense is that Eco Pro mode allows full power when the power pedal is floored so that acceleration is just as fast as in Comfort mode. Maybe that's not true for the Model 3's Chill mode.
Aloha,
Art

2014 BMW i3 Arravani Grey, Giga World, Tech + Driving Assist, Parking Assist, DC Fast Charging, JuiceBox EVSE

EVMan
Posts: 295
Joined: Sat Feb 25, 2017 4:31 pm
Location: USA, CA

Re: Benchmarks: 2014 BMW i3-REx and Standard Range Plus Model 3

Wed Apr 17, 2019 2:18 pm

Yes. The model 3 chill mode , is permanently slow. One feature i like in the i3 is the nice override, when you press it hard

Do we need to use the breaks in i3 when we change Forward / rear gear , when slow - say under 5 miles ?

I like the 3 second brake press activates the hand gear. i use it in very red light now. continuous pressing was causing heel issues
2017 33KWH Rex
Model 3 Long Range
Solar ToU Plan

bwilson4web
Posts: 692
Joined: Fri Apr 29, 2016 11:59 pm
Location: Huntsville, AL

Re: Benchmarks: 2014 BMW i3-REx and Standard Range Plus Model 3

Thu Apr 18, 2019 1:31 am

Both cars have a 'hold' mode that I find quite useful on hills and slopes. Brake to a stop and cars remain fixed even with foot off brake and pressing the accelerator moves the cars out smartly.

Bob Wilson
20k/27k mi 2014 BMW i3-REx
10k/10k mi 2017 Prius Prime

EVMan
Posts: 295
Joined: Sat Feb 25, 2017 4:31 pm
Location: USA, CA

Re: Benchmarks: 2014 BMW i3-REx and Standard Range Plus Model 3

Thu Apr 18, 2019 7:35 am

My Hold mode in i3 frequently fails or slips in steeper driveway slopes or hilly roads.
Like its on for a second , and then the cars start to roll as if the brake was not effective enough.
Is this a unique problem to me or is it common. Do i need to get it checked. Looks like a software issue
2017 33KWH Rex
Model 3 Long Range
Solar ToU Plan

EVMan
Posts: 295
Joined: Sat Feb 25, 2017 4:31 pm
Location: USA, CA

Re: Benchmarks: 2014 BMW i3-REx and Standard Range Plus Model 3

Tue Apr 23, 2019 7:29 pm

Can you also do benchmark of the regen ?
2017 33KWH Rex
Model 3 Long Range
Solar ToU Plan

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