PFC01 Pads Making Sparks?

[dmw16]

I just installed a pair of stoptech st40 calipers and 355mm rotors on my E46 M3. And tonight I took it out to do a few 60-5 runs to bed the pads in.

Here's the thing, from the passenger side I saw sparks under heavy braking.

Please note that the rotors have about 500 miles on them using the stoptech pads. So is this normal?

[TC Kline Racing]

Are the pads new? If so, that is totally normal. Alot of times there is sediment, or the edges are not chamfered which causes the sparks upon bed-in. Either way, I wouldn't worry about it.

I've done a bed-in before many times on track pads with non-chamfered edges and it's a spark show at 10pm at night

Is it making a loud grinding noise, or does it sound normal?

Chamfered:



Non-chamfered (which is what you may have)

[dmw16]

Thanks for the info.

They aren't making any particular noise. Yes, the pads are brand new and I believe they aren't chamfered. So I suppose that's what's going on.

It seemed a little weird that they weren't sparking from both sides, but everything seems normal otherwise - no pulling or anything.

[TC Kline Racing]

Originally Posted by dmw16

Thanks for the info.

They aren't making any particular noise. Yes, the pads are brand new and I believe they aren't chamfered. So I suppose that's what's going on.

It seemed a little weird that they weren't sparking from both sides, but everything seems normal otherwise - no pulling or anything.

Then, yes, that's what it was. Carry on hooning and enjoy that BBK