wiztecy
Active Member
Here's what Carbotech says about the gas film that's built up from heat:
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Carbotech Performance Brakes: Frequently Asked Questions
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So in the case of slotted and drilled that gas film has some place to go and less area for the pad to be "aquaplaning" across the film layer that's created. It makes sense to me but the true test is comparing each rotor, drilled, slotted, and flat on a brake test that is rather consistent.
But the issue I'm having when wet is as if there's a film running between the rotor / pad. So still trying to figure out what it is.
1) Slime from the brake dust collected and now weeping out slowing from the drilled hose of the rotor?
2) The rain is creating a film between the pad/rotor and needs more pressure to actually apply an appropriate force to the pad so it can actually bite the rotor. Hence a dual piston / possibly larger rotor up front.
3) Or the brake pad can't heat up enough with water cooling down the rotor to allow it to work.
Augie's suggestion sounds like a way to troubleshoot it with the stock rotors for #1. Before the next big storm I'll try to pull off each wheel, remove the rotor, thoroughly wash the rotor reaming out all the holes so there's a lower chance of slime running across the rotor when it rains.
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Carbotech Performance Brakes: Frequently Asked Questions
6. What is brake fade?
Fade, or brake fade is the reduction in stopping power caused by a buildup of heat in the braking surfaces (and in the case of drum brakes the arc of the brake shoe don’t match the arc of the drum in response to heat). Brake fade can also be caused by the brake fluid boiling. Compounds are held together by resins, these resins can revert to gas when high temperatures are reached. When this happens the brake pads can “aquaplane” on a film of gas created by the over heated resins. Many low quality pads suffer continuous fade at very low temperatures.-----------------------------
So in the case of slotted and drilled that gas film has some place to go and less area for the pad to be "aquaplaning" across the film layer that's created. It makes sense to me but the true test is comparing each rotor, drilled, slotted, and flat on a brake test that is rather consistent.
But the issue I'm having when wet is as if there's a film running between the rotor / pad. So still trying to figure out what it is.
1) Slime from the brake dust collected and now weeping out slowing from the drilled hose of the rotor?
2) The rain is creating a film between the pad/rotor and needs more pressure to actually apply an appropriate force to the pad so it can actually bite the rotor. Hence a dual piston / possibly larger rotor up front.
3) Or the brake pad can't heat up enough with water cooling down the rotor to allow it to work.
Augie's suggestion sounds like a way to troubleshoot it with the stock rotors for #1. Before the next big storm I'll try to pull off each wheel, remove the rotor, thoroughly wash the rotor reaming out all the holes so there's a lower chance of slime running across the rotor when it rains.
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