Quote:
Originally Posted by M3SQRD
Even though they don’t have 405 mm diameter rotors, the AP and PFC rotors have considerably more thermal capacity due to thicker disc faces, increased rotor diameter and high vane count to keep rotors cool and pump air thru the rotor. The stock F8x or e9x can’t compete even though rotor size is +/-10 mm diameter
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I think you and I have the same amount of track experience. I've been doing track days for about 30 years now and autocross competition for 35 years.
I'm no expert in rotor design, but the stock floating rotor is pretty good for a stock rotor. In terms of cost, it is significantly cheaper than any aftermarket rotor. Throw in FCP Euro's lifetime warranty, I've saved myself thousands of dollars in rotors over the years.
You have to remember that this caliper upgrade is a cost effective way to increase the performance of the stock brakes. This upgrade is less than $1000. If someone wants to sell me a new AP big brake kit for less than $1000, you bet I'd buy it!