What makes the stock brakes stink?

kdo2milger · 11-15-2009, 02:07 AM

Quote:

Originally Posted by antennahead

I think I know someone who has that set of pads

JoeD?!?

kdo2milger · 11-15-2009, 02:07 AM

Quote:

Originally Posted by antennahead

you're just pissed you're land locked right now

eh...true...

Trips · 11-15-2009, 02:08 AM

Quote:

Originally Posted by antennahead

I think I know someone who has that set of pads

Ding! Ding! Ding!

Chan Chee Hoe · 11-15-2009, 06:28 AM

Standard brake pads is for quieter braking,less dust,longer life,those who use the car for track need to upgrade them,maybe to 'Nismo' pads.?

AP - Chris_B · 11-27-2009, 04:50 PM

Quote:

Originally Posted by kannibul

I was doing a bit of "hard driving" in an empty parking lot, and with that comes some hard braking...

Afterwards, my wife who was with me, commented on something being stinky, to which I replied that's the brakes. She asked me why, which I said they smell when they get hot - she of course said, aren't they semi-metallic - I said I don't think so, I think they come with organic...

So, with that, I guess this is a two-parter...

1) Are the stock pads semi-metallic or organic, or something else?
2) What makes them stink?
Bonus:
3) If they are Organic, would switching to semi-metallics be "better"?
4) When they smell, are they hot enough to be less effective?

The smell (assuming everything else in your car smells "normal") is what the resin binders give off when they are being chemically converted to carbon. You are burning the pads and turning them into charcoal. If pushed harder, they will start to fade and become MUCH less effective!

The OE semi-metallic pads have lower temperature binders, which will melt/burn before higher temperature pads will. The binders are what holds all the chopped and ground bits in the pad together. Overheating the binders is what causes pad glazing and uneven pad deposits on rotors.

When switching to higher temp, semi-metallic pads, they will out-gas initially during bed-in when they go in to "green pad fade". Once they are bedded properly and completely cooled, you won't smell them again unless using them very hard, such as at the track or a serious canyon run.

Chris

imag · 11-27-2009, 04:56 PM

At least brakes are relatively cheap.

I remember when I was learning to drive. I backed up on a hill, slipping the clutch the whole way up.

My dad stopped me when we got to the top and said, "you smell that smell?".

Sheepishly, I said, "yeah..."

He said, "That's the smell of money."

Never forget that one.

11-27-2009, 04:56 PM	#21 (permalink)
imag Enthusiast Member Join Date: Mar 2009 Location: Oakland, CA Posts: 446 Drives: up the wall Rep Power: 16	At least brakes are relatively cheap. I remember when I was learning to drive. I backed up on a hill, slipping the clutch the whole way up. My dad stopped me when we got to the top and said, "you smell that smell?". Sheepishly, I said, "yeah..." He said, "That's the smell of money." Never forget that one. __________________ Stillen CBE, Stillen track cooler, Stillen Gen3 Intakes, B&M short shift kit

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11-15-2009, 06:28 AM	#19 (permalink)
Chan Chee Hoe Track Member Join Date: Mar 2009 Location: Singapore Posts: 861 Drives: 370z,Yellow,7sp A Rep Power: 17	Standard brake pads is for quieter braking,less dust,longer life,those who use the car for track need to upgrade them,maybe to 'Nismo' pads.?