CANBus : EPIC module (746)

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ANBO
Posts: 187
Joined: Fri Mar 27, 2020 7:50 pm
Location: Switzerland

Re: CANBus : EPIC module (746)

Post by ANBO » Sun Mar 28, 2021 10:08 am

dernotte wrote:
Tue Mar 23, 2021 2:51 pm
kermit68 wrote:
Sat Feb 06, 2021 7:51 pm

on 726 DD09 is speed but I think it's the real speed, i.e. -3% of the speed displayed on the dashboard.
On my car, when I drive at 100km/h on the cruise control, that value is at 98 km/h, with my 18" winter tire. In a month I will be able to swap for the 20" summer tire, and I will redo the test. Anyone has different value with different set of tires ?
The PID gives for me the exact speed in display (using cruise control; 18" @ 3.0 bar). GPS speed is 4-5km/h lower.
🇨🇭 EV400 HSE (MY2020; MAR 2020); 18" ❄
⚙️ H264 ⚙️ ICM: S20C ⚙️ VCS: 19.2
⚙️ BECS: BP-AAE-BC-AC-BE ⚙️ Maps: 06.2020

Maxwell_400
Posts: 429
Joined: Mon Oct 14, 2019 10:09 am
Location: Norway

Re: CANBus : EPIC module (746)

Post by Maxwell_400 » Wed Apr 07, 2021 7:18 am

ANBO wrote:
Sun Mar 28, 2021 10:08 am
dernotte wrote:
Tue Mar 23, 2021 2:51 pm
kermit68 wrote:
Sat Feb 06, 2021 7:51 pm

on 726 DD09 is speed but I think it's the real speed, i.e. -3% of the speed displayed on the dashboard.
On my car, when I drive at 100km/h on the cruise control, that value is at 98 km/h, with my 18" winter tire. In a month I will be able to swap for the 20" summer tire, and I will redo the test. Anyone has different value with different set of tires ?
The PID gives for me the exact speed in display (using cruise control; 18" @ 3.0 bar). GPS speed is 4-5km/h lower.
If the speed is wrong then also the odo will be wrong. In the graph I plot odo versus cumulative sum of speed x time. The advantage of cumulative speed x time is much higher resolution, odo has only 1 km resolution.
The journey was much longer, I just zoomed in to show the difference in resolution.

Figure_odo.png

I-Pace SE++, MY20, 18" summer & winter, no panoroof, towbar, spare wheel, 20C, TCU 19.2, BECS: BP-AAE-BC-AC-BE

kermit68
Posts: 592
Joined: Sat Sep 15, 2018 1:06 pm
Location: Rome / Italy

Re: CANBus : EPIC module (746)

Post by kermit68 » Wed Apr 07, 2021 8:22 am

At least with 20" tyres 0xdd09 is not the real speed. Double checked with phone and Garmin GPS. Never checked the distance accuracy on the other hand, but 5% error seem to me too much for not being evident.
MY21 Yulong White SE, 20", head-up display, air susp, matrix lights, privacy glass, black pack and other fine stuffs
MY20 SE - gone

EEV320
Posts: 83
Joined: Mon Nov 30, 2020 11:24 am
Location: Germany

Re: CANBus : EPIC module (746)

Post by EEV320 » Wed Apr 07, 2021 8:32 am

I saw a comparison on YouTube. Etron vs I pace. Although they took the same route the I pace had like 2km less on the odometer. Maybe that is what you guys see here as well.
EV320SE MY2021
German spec.
Eiger grey, black pack, drivers assistance pack, WiFi hotspot
Software 2.0.8a P3AX

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