Took my '91 E30 318i to the corner garage for a brake job. When I got
the car back, noticed right away that most braking (except a very light
touch) takes about twice as much pedal pressure. Told the guy at the
shop that it felt different and it eventually came out that he'd used
ceramic pads. For the last few days they've been breaking in and it
seems to take a bit less pressure than on the first day. Anyone out
there have experience with ceramic pads? Will I ever be able to make an
emergency stop with the same amount of pedal pressure as with metallic
Any new pads will need bedding in. However, ceramic pads are an overkill
for your vehicle because they usually need heat before they start working to
their full potential.
The question is, why would they choose to use ceramic pads on a E30 318?
Is your pedal hard, but no braking performance? Or is the pedal spongy?
Actually, I'm pretty google saavy.
I was trying to (gently) say that I did not believe Mr. Ali's assertion
that ceramic brake pads need a whole lot of warming up before the
"bite". A part of my skepticism is based on first hand knowledge gained
through actual first hand experience.
Silly as that is, I know...
Unless there has been a recent development, ceramic brakes were used for
their capabilities on dealing with heat. However, this meant that the
compound was pretty hard. Therefore, due to the hard compound, the amount
of friction they provided at the same temperature as softer compound pads
was less and so needed heating up to get the same braking force.
Your disks will be worn, but not perfectly smoothly, so new pads will only
contact a proportion of the disk surface. Once they bed in after a few days
the performance should be similar, although ceramic pads are designed to
keep operating at higher temperatures under extreme load - e.g. racing, long
alpine descent. Whilst you are unlikely to experience fade (which has only
ever happened to me once in a non BMW, with unventilated front disks after a
long descent), when cold you might still have to press a little harder.
Ceramic probably overkill on a 318, or indeed any road BMW driven normally
(enthusiastically, but not silly)
Forgot to mention that he replaced the front rotors too. I'll have a
better idea about the performance in another day or two. Ceramic pads
are definitely overkill for my car. If I'd known he might use 'em, I
would have said No Way!
Do they work very much better when hot? I've got some on my 'other' car
which are poor when cold but normal after a couple of applications. It's
only really noticeable when braking gently from low speed - if going fast
they obviously heat up very quickly. ;-)
*Xerox and Wurlitzer will merge to market reproductive organs.
Dave Plowman firstname.lastname@example.org London SW
From my experience and as far as I know ... the reason bmw puts soft brakes
on their cars is because they perform better at slower speeds (highway
driving, city driving) ... and so far they have always worked out for me....
u might wanna go back and put bmw brakes on
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