E46 Brake Force Display Demonstration

[ryankokesh]

Well that's pretty darn spiffy!

[terraphantm]

Cool video.

I know I have 2-stage braking on my Z4M but have no clue at what threshold it kicks in

Z4 LCM is actually the same as the E46 LCM, so you should be able to enable stage 3 with the above lines. Though I would set it this way:

BFD_SW1_STUFE2 aktiv / nicht_aktiv BFD Stage 2 activation using Deceleration Sensor (Sensor 1?
BFD_SW2_STUFE2 aktiv / nicht_aktiv BFD Stage 2 activation using Deceleration Sensor
BFD_SW1_STUFE3 aktiv / nicht_aktiv BFD Stage 3 activation using Deceleration Sensor
BFD_SW2_STUFE3 aktiv / nicht_aktiv BFD Stage 3 activation using Deceleration Sensor (Sensor 2?)
BFD_ABS_STUFE3 aktiv / nicht_aktiv BFD Stage 3 activation using ABS sensor
BLST1_BLST3 aktiv / nicht_aktiv Outer tail lights blink during Stage 3 as well

[wsmeyer]

So what would the difference be between this:

BFD_SW1_STUFE2 aktiv / nicht_aktiv BFD Stage 2 activation using Deceleration Sensor (Sensor 1?
BFD_SW2_STUFE2 aktiv / nicht_aktiv BFD Stage 2 activation using Deceleration Sensor
BFD_SW1_STUFE3 aktiv / nicht_aktiv BFD Stage 3 activation using Deceleration Sensor
BFD_SW2_STUFE3 aktiv / nicht_aktiv BFD Stage 3 activation using Deceleration Sensor (Sensor 2?)
BFD_ABS_STUFE3 aktiv / nicht_aktiv BFD Stage 3 activation using ABS sensor
BLST1_BLST3 aktiv / nicht_aktiv Outer tail lights blink during Stage 3 as well

and this:

BFD_SW1_STUFE2 aktiv / nicht_aktiv BFD Stage 2 activation using Deceleration Sensor (Sensor 1?
BFD_SW2_STUFE2 aktiv / nicht_aktiv BFD Stage 2 activation using Deceleration Sensor
BFD_SW1_STUFE3 aktiv / nicht_aktiv BFD Stage 3 activation using Deceleration Sensor
BFD_SW2_STUFE3 aktiv / nicht_aktiv BFD Stage 3 activation using Deceleration Sensor (Sensor 2?)
BFD_ABS_STUFE3 aktiv / nicht_aktiv BFD Stage 3 activation using ABS sensor
BLST1_BLST3 aktiv / nicht_aktiv Outer tail lights blink during Stage 3 as well

Also, would there be a preferred setup for cars driven in snow vs cars that aren't?

I'm wondering if using the ABS sensor might cause the BFD to come on more than you'd want when driving in snow.

[az3579]

Driving in snow shouldn't be a factor in your decision. If you're hitting ABS in snow/ice, you're going too fast for the conditions anyway and people behind you should be warned about your situation.

[wsmeyer]

To each his own I guess I'm just not sure I want this thing tripped every time a wheel briefly locks up on a patch of ice.

[ELCID86]

To each his own I guess I'm just not sure I want this thing tripped every time a wheel briefly locks up on a patch of ice.

Why not?

[terraphantm]

Driving in snow shouldn't be a factor in your decision. If you're hitting ABS in snow/ice, you're going too fast for the conditions anyway and people behind you should be warned about your situation.

I don't think I agree that you're always going too fast when ABS kicks in. Especially when stopping on a slope, it'll get triggered when you're very close to a stop (as in you're already going about as slow as you can go without being stopped).

That said, I think the ABS trigger should stay. In winter conditions, often times the traction is low enough that you can't decelerate fast enough to hit the thresholds. But with the ABS trigger set, at least you'll be warning people about low traction and such.

Also I should correct those translations

BFD_SW1_STUFE2 aktiv / nicht_aktiv BFD Stage 2 activation with deceleration threshold 1
BFD_SW2_STUFE2 aktiv / nicht_aktiv BFD Stage 2 activation with deceleration threshold 2
BFD_SW1_STUFE3 aktiv / nicht_aktiv BFD Stage 3 activation with deceleration threshold 1
BFD_SW2_STUFE3 aktiv / nicht_aktiv BFD Stage 3 activation with deceleration threshold 2
BFD_ABS_STUFE3 aktiv / nicht_aktiv BFD Stage 3 activation with ABS
BLST1_BLST3 aktiv / nicht_aktiv Main brake lights "stage 1" used as stage 3 (blinking)


If anyone's curious, the actual threshold values are in the cluster (AKMB) settings. I haven't figured out what units they are in though.

[derbo]

Thanks terra! I didnt know the translation

Is your setup, using stage 2 during heavy deceleration, and stage 3 during abs activation?

[terraphantm]

Thanks terra! I didnt know the translation

Is your setup, using stage 2 during heavy deceleration, and stage 3 during abs activation?

I've got it so that:
Stage 2 = heavy deceleration
Stage 3 = very heavy deceleration OR ABS

That said, so far I have not been able to trigger stage 3 without ABS, which to me suggests I don't have enough grip to hit that 2nd threshold. And I'm running Pilot Super Sports.

I might just eliminate stage 2 and have stage 3 set to threshold 1 and ABS. Stage 2 isn't super noticeable on coupes

[derbo]

That little outer ring is very slight even when I'm inches behind the car in Front. I only noticed it on the E92s when I started looking for it in the E46 M3s.

I'll have to play around with it and see if I can even hit Stage 3 before ABS with your setup. I am running Star Spec tires so it might be possible.