Yet another brake thread
Posting Guru
Joined: Mar 2008
Posts: 1,104
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From: West Tx
Drilling and slotting does nothing to increase stopping power directly. It does help keep the rotor cooler though, just as ventilated rotors stay cooler than non ventilated. If you can get rid of the sunk heat better, you will stay in the best temperature for the pad. Overheated pads have a steeply decreased coefficient of friction; brake fade. On the subject of upgraded brake kits, SSBC makes an 8 piston caliper 'upgrade' but the hydraulic power of the braking system is fixed. The 8 pistons may or may not work better, you have 8 pistons instead of 2; take it as you will.
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Senior User
Joined: Jul 2009
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Drilling holes in rotors is to make them lighter. Porsche started this in thier race cars because they built such massive rotors they had to lighten them up. Period.
If you want to get cooler running rotors put a brake cooling duct on them. and or buy a pad that will take the heat. Rotor mass is what you want to have hence the huge rotors on a Super Duty. Did y'all know that air flows through the vented rotors from the hub out to the outer edges? just look at the splash shield and see where the mini duct leads to.
O'Rielly's has 78 dollar rotor with one year warranty or 168 dollar rotor with lifetime warranty. we put each of them side by side on the counter. Absolutley no difference in weight machining or perceptable anything different.
If you want to get cooler running rotors put a brake cooling duct on them. and or buy a pad that will take the heat. Rotor mass is what you want to have hence the huge rotors on a Super Duty. Did y'all know that air flows through the vented rotors from the hub out to the outer edges? just look at the splash shield and see where the mini duct leads to.
O'Rielly's has 78 dollar rotor with one year warranty or 168 dollar rotor with lifetime warranty. we put each of them side by side on the counter. Absolutley no difference in weight machining or perceptable anything different.
Posting Guru
Joined: Mar 2008
Posts: 1,104
Likes: 5
From: West Tx
So you would then argue that those holes have no turbulent airflow buffeting across them even with the rotor spinning? Hmm, seems kind of odd to me. No crossdrafting? At any rate, as far as rotor quality, the metallurgical properties cannot be seen by the bare eye, nor felt.
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