Quote:
Originally Posted by FuszNissan
Lighter weight, and you can change the rotor without changing the hat. It will cost less in the long run. But a little more $$ upfront.
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Not sure that is necessarily true. With most 2-piece rotors you have to replace all the mounting hardware at the same time so you end up paying about the same long term. The AP rings alone cost me more than a set of solid StopTechs but they will last 12+ track days instead of 6.
The big advantage is that they can take a lot more track abuse due to the ring being able to freely expand separate of the hat. This is mainly important up front, the rears don't take as much heat (my front's get to 1100F, the rears only 750-850).
I also prefer the sweeping action of the slotted rotors. I have significant wear on my rotors yet there isn't a single gouge or irregularity on the surface, they are as flat as flat can be.
New rings and caliper seals are on the way from Stillen (thanks guys!) and I'll be all fresh for the season. I'm also switching the rear iron hats out for aluminum since I don't use the e-brake much anyway and it will save almost 20lbs of rotating mass.
So I think the bottom line is, if you track a lot then 2 piece rotors are worth the investment. If you track occasionally just get a solid or slotted rotor and get them cryo-treated.