Krush
05-22-2007, 03:46 PM
I bought a set of R1 rotors off Ebay a few weeks ago, and finally opened them up today. The rears look exactly as pictured on there add, drilled slotted, and double ground. The fronts however, came all black, including the area where the pads hit the rotor. I called them up and told them they forgot to grind my front rotors, but the guy told me that they didn't. He told me that they normally get there rotors after they have been dipped (for black hubs) but that shipment of front Jeep rotor came without being dipped first. So normally they start with all black rotors, then drill, slot and grind them. In this came they started with bare rotors, drilled, slotted and ground them, then sent them out to be dipped. Which could be very true from the look of the rotors. My main concern is, they told me the coating would come off the area where the pads hit "like butter" but will this "Electro-Statically Applied" coating adversely affect my pads?
idealrides
05-22-2007, 04:47 PM
No. On my last car I got a set of those rotors and the coating was rubbed off by the pads very quickly with no problems.
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KINGMONKEY
05-22-2007, 04:47 PM
I got them also the same way,The fronts and rears need to be grinded and trued as well the black removed in the small hubs in the rears,Mine have been installed,They are quality and I'm pleased
idealrides
05-22-2007, 07:01 PM
Oh by the way, I almost forgot, after a year I noticed that there was heat stress cracks surrounding each drilled hole. But FWIW, the cracks looked identical to ones I saw on a Porsche 959.
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Go~RillaWRX
05-23-2007, 08:14 AM
As I posted before. Stay away from drilled. Get solid or slotted. The performance gain from drilled is negated by the fact that they will warp and crack more rapidly. Just my very informed and tested opinion.
hound
05-25-2007, 09:15 AM
I would say that going with drilled is fine as long as the rotor is a quality product. I had a full set (front and rear) of Stillen rotors on my 5.9 and there were small cracks around the holes but they never warped or failed in any way. I used them for over 5 years.