What have you done to your E89 today
- Thread starter Bombur
- Start date
South Lanarkshire
I’m being drawn to a boot spoiler…Big Andra said:
Z4Dude said:I like the spoiler ... could you share the info on that?
It's this one here.
https://www.ebay.co.uk/itm/176239365018?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=f4fsv4x_r_g&sssrc=4429486&ssuid=MJ_SDuRqQhu&var=&widget_ver=artemis&media=COPY
Big Andra said:Z4Dude said:I like the spoiler ... could you share the info on that?
It's this one here.
https://www.ebay.co.uk/itm/176239365018?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=f4fsv4x_r_g&sssrc=4429486&ssuid=MJ_SDuRqQhu&var=&widget_ver=artemis&media=COPY
I like it - thanks!
Scottish Borders
Porthcawl
Finished my 677 Professional Audio upgrade with the addition of the rear centre speaker grill with built-in tweeter. Only £37 all-in from Sytner BMW at Nottingham, far cheaper then even lllparts.co.uk, which have it starting at £44 + shipping! And the cheapset on eBay was £57. 
* Not actually noticed any difference having the tweeter there, but at least the grill finishes the look properly
* Not actually noticed any difference having the tweeter there, but at least the grill finishes the look properly
Attachments
Finally got the bonnet open
Rebuilding the M5 rear calipers about to be fitted to my 35is with 370mm discs..decided to do the whole job in-house…fresh seals, pistons, and motor assembly..
For those vaguely interested in how the electronic parking brake aka electromechanical parking brake (EMF) works..here’s some pics of the parts..
So a geared electric motor drives a jackscrew attached to a metal puck that sits inside the piston of a standard sliding caliper disc brake..the screw goes through the outside wall of the caliper via a seal to the motor..there’s some needle roller thrust bearings to take the strain..when the ’handbrake’ is applied an ECU drives the jackscrew forward pushing the piston against the pads..it senses when the current starts to rise indicating that the piston has travelled about as far as it can..it then stops..the ECU receives signals from the DSC to tell what temp it is at..that determines when and how frequently it retightens the jackscrew..in addition the DSC checks to see if the car starts to roll in which case it commands the parking brake ECU to re-apply force…because the motor drives through a planetary gear arrangement the position is locked when power is removed..so no need for constant electrical current..simples !
For those vaguely interested in how the electronic parking brake aka electromechanical parking brake (EMF) works..here’s some pics of the parts..
So a geared electric motor drives a jackscrew attached to a metal puck that sits inside the piston of a standard sliding caliper disc brake..the screw goes through the outside wall of the caliper via a seal to the motor..there’s some needle roller thrust bearings to take the strain..when the ’handbrake’ is applied an ECU drives the jackscrew forward pushing the piston against the pads..it senses when the current starts to rise indicating that the piston has travelled about as far as it can..it then stops..the ECU receives signals from the DSC to tell what temp it is at..that determines when and how frequently it retightens the jackscrew..in addition the DSC checks to see if the car starts to roll in which case it commands the parking brake ECU to re-apply force…because the motor drives through a planetary gear arrangement the position is locked when power is removed..so no need for constant electrical current..simples !
