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Old 04-07-2009, 01:56 AM
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dieseldiehard dieseldiehard is offline
Join Date: Oct 2002
Location: Bay Area No Calif.
Posts: 4,277
OK, you guys got me wondering. So I went looking at what Akebonos are on the market and I'm sure that what I had were the Pro ceramics.
Here's what a review on the Tire Rack said about them:
"I changed from a stock pad to these hoping for more stopping power and less dust. What I got was a-lot less stopping power and a little bit less dust. When I first opened up the package what I noticed was the pads had a large amount of chamfered (tapered) material taken off each end of the pad----a-lot more than I have seen on other pads. With so much material gone it effectively reduces the percentage of pad surface area by at least a third. These pads are not good stoppers to the point of feeling unsafe even at moderate speed. The dust level is only a little better than stock. I have used Raybestos Quiet Stop ceramic pads on other cars with good success but they were not available for the front of my BMW. I do not reccoment (sic) these pads."
Oh well. Maybe it was a bad batch?

I can say that the chamfer he mentions is to prevent squealing, the Akebonos seem pretty extreme on the angle. I wouldn't have made them that way if I were the designer. Anybody seen that on the Akes you are using?
I will file the edges on the pads to a small chamfer if I run into pads that squeal (after break in!) - certain cars seem to squeal esp early Mercedes with a single piston caliper when tha car is braked in reverse (backing).
This can be reduced or eliminated by filing off a small amount on the leading and trailing edges of the friction material. And use a lot of brake grease on the side that slides in the caliper.
I never had any squealing with the Akebonos, actually the rears on Porterfields squealed until they were fully broken in, I think one of the pistons on the new set of calipers was angled slightly. It gradually went away until I think I hear it only once in a while when the brakes are really hot. That's a whole other story though. Its the initial bite that the ceramic Pros lacked until they got nice and hot.
'00 E320 (wifes car), '95 E320 Wagon my favorite road car. '99 E300D wolf in sheeps body, '87 300D Sportline suspension, '79 300TD w/ 617.952 engine at 367,750 and counting!
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