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Originally Posted by Dean
Sounds like your sister could teach you a thing or two about braking...  She brakes less.
The pads probably didn't have much more than 1/4" to start with, and the slight lip is common on Audi rotors as they always run the pads slightly inboard of the edge of the rotor. On solid rotors, you usually get 1.5mm worth of wear, and vaned gets 2mm. a mm is a huge amount on a rotor that has only been on the street and one set of street pads.
Pads should have a groove down the middle, and from what you describe, there should still be a good deal before she even get to the bottom of the groove. Normal peaple can still get 10K or so out of the pads perfectly safely after the groove is gone.
I understand your concern, but it really sounds like it is a non issue.
My buddy Geoff can get pretty much anything. http://seccs.org/forums/showthread.p...eoff#post46950
Also, the good old interweb. |
My sister is Karen. Kristen is our friend via Eric and Marissa.
And that Audi is a chipped twin turbo A6... I'm gonna guess in the neighborhood of 275hp at the wheels, though I've never driven it, so I can't comment on how fast it actually drives. Plus it's not exactly a light car. Kristen's had it for maybe a month or two, as she recently purchased it from her family, so this is a car that will eat brakes (heavy and fast) and the owner doesn't have the full history of the car. It very well could already be on a second set of rotors, but it's unlikely. I know I've gone through several sets of rotors on my car, and it's the same age/mileage... though I clearly use my brakes quite a bit more than Kristen ever will.
Anyway, without the actual specs for min thickness and a set of calipers to measure the rotors, I'm hesitant to simply say "they're fine" when the driver is a regular person and not a motor-head like the rest of us, and the car is so heavy and fast. If it were my car, I'd just top off the fluid and be on my merry way for the next few thousand miles. But it's not my car, so I want to do a little research 1st.
Now, if the pads and rotors really do have enough left, why is the light coming on? I assumed the car uses a sensor in the fluid like most to estimate pad life, but searching online for pads I've come across many people selling "pads with integrated wear sensor". Plus there are certainly elecronics that go into the caliper. So I'm assuming this car has actual wear sensors... leave it to the germans to over-engineer everthing.
So... I'm looking for some recomendations along the lines of which pads are a good value on this car, where's a good place online to order 'em from, what are the minimum widths for rotors, etc. Audi's aren't my bag, and I was hoping this would be basic knowledge for some of the Audi owners here on the board... searching audiforums.com only resulted in people talking about which dealer to bring the car to for a brake job.
This isn't my car, so I wasn't looking to put an assload of time into figuring out what's what on it. But I don't feel right letting a friend drop $1200 at Les Schwab to get some crappy pads and rotors when a brake job is 30 minutes of work and $150 in pads and fluid for a better setup. Someone drop some knowledge on me! Most importantly, what online shops do you guys trust for non-Subaru brake parts?