A few people expressed concern about brake bias as a result of twiddling with the front and rear discs..
So I've done a calculator for the E89 with the current used and known discs, calipers and pads to look at how different combos work out.
I've assumed all pads have the same coefficent of friction, which for street pads is not unreasonable..
As you can see, both what BMW did on various E89s and what I'm suggesting for BBK upgrades pretty well match..
For those that want to understand brake bias I refer to ..
If you want to noodle here's a copy
https://www.dropbox.com/scl/fi/rt7ceuw6 ... l74bi&dl=0
So I've done a calculator for the E89 with the current used and known discs, calipers and pads to look at how different combos work out.
I've assumed all pads have the same coefficent of friction, which for street pads is not unreasonable..
As you can see, both what BMW did on various E89s and what I'm suggesting for BBK upgrades pretty well match..
For those that want to understand brake bias I refer to ..
If you want to noodle here's a copy
https://www.dropbox.com/scl/fi/rt7ceuw6 ... l74bi&dl=0
