fatbillybob
Well-Known Member
But for someone like me who is nowhere near the limit of the car and simply getting practice in HPDE, I see no use for the crazy 2pc rotors. .
2 peicers aluminum hat and ring rotors are a simple no brainer upgrade even if only tracking occasionally.
Any 2pc will take 20lbs off rotating mass similar to gains the gt350r carbon wheels do for the R over regular gt350.
All 2pc rotors have quality metalurgy to handle the higher temps of track/race pads and superior engineered cooling so your pads, even street pads, will work better as a package.
The 2pc rotor rings are not much more than a quality 1pc rotor. Have you ever seen a 1pc rotor blow up? I do probably every other year. It isn't pretty and many racetracks have walls to hit.
AP is generally the best 2pc but I am very happy with stoptechs too. I can get 1.5 years of racing using xp20 pads on 3600lb car. My new favorite is the PFC V3 with rotor retention ring. You can change a ring out in 60 seconds! Brilliant system
2pc are called floating because there is about 10 thou play. It you hold the ring and shake the aluminum hat rattles. This can annoy street car owners but that 10thou is there for heat expansion and reduction in pad knockback, another performance feature of 2pc. The PFC V3 uses retention spring so under drive you get all the float but no noise. I think the V3 is best for dual use guys for this reason and killer for racers always in a hurry at the track. I use to have a back up set of rings/ rotors to swap at races. Now with 60 sec changes I just need a set of new rings for backup.
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