I have been looking for a good set of brake rotors for quite some time. The sets that I like are the SP slotted or the SP diamond slotted. I was hoping someone has used these here and could give me some feedback. I have done alot of research here and there from what i can tell they have thoroughly engineered all thier rotors, even the cross drilled have a very generous chamfer. just an example http://www.raceshopper.com/sp_rotor_tech.shtml

looks high quality and fairly affordable?
oh and let me know what you guys would think looks better, slotted or diamond slotted. THANKS

While I know nothing about SP myself, I'll say other than the 'slotted only', their rotors lost a TON of surface area. Those chamfers on the drilled rotors are enourmous. Way too extreme. If you do something like the diamond slotted, you better plan now on a larger diameter rotor to make up for the surface area you lost.

Their claim that the diamonds give the same effect as drilled is ridiculous. The idea of crossdrilled rotors is (generally) to use them for one race, then throw them away, as the air travelling THROUGH the hole cools that surface more rapidly than surrounding areas. It cools the rotor quickly, but also stresses the rotor in a very short amount of time.

Have you read this recent topic?
http://www.bonnevilleclub.com/forum/...ic.php?t=55996

I'll move this one to Performance and Brainstorming as well.

I've had SP slotted on my 91 for a little over a month now and I've got to say that I've been impressed with them. I had to get them since they are the only company I've found that makes non-oem style smaller rotors that fit the 88-91'*. Overall, the main difference I've noticed is with improved wet braking. There was one small issue installing them which was that they were thicker than the stock rotors and we had to plane down the new pads to keep them from rubbing constantly(this may not be a issue for your year but just a heads up). But like I said, I've been happy with them so far. I agree with will that the diamond ones won't give the same effect as the drilled, its mainly just a different look. Anyway, good luck and hope this helps.

Beat them on there .....hmmm, I didn't try that actually, but there was definitely more pressure than I thought was approiate. I think it was just a combination of the new pads and rotors, both of which were thicker than the oem spec(the pads I got aparentally wanted to increase lifespan by increasing their thinkness a little....not a bad thing, but with the thicker rotor it went from contacting the rotor to pressing against it, so just a little sanding was all that it needed)

Thanks for moving that Wren. I have been leening towards the just slotted since I like the look better. I'm not just concerned about looks, performance and durability are my #1 concern. I am currious about warpage issues this is a heavy car and all of my driving is in the mountains so a good rotor is key. thnx for all the input

willwren I have had the premium napa drilled/slotted rotors for a few months now. Also, I regularly get on them for 100+ mile an hour stops. So far I cant feel any warpage like my stock ones did.

I'm glad you're happy with them, but they simply will not last as long as slotted only, and you may find it difficult if not impossible to find a shop that will turn drilled rotors when the time comes. Many are simply refusing to do it now.