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      04-02-2012, 12:17 PM   #21
Zzhou
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Drives: 2012 E92 SSII ZCP DCT
Join Date: Aug 2011
Location: West Lafayette,IN/Shanghai,China

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Quote:
Originally Posted by dbarnes
^+1

Also, the vanes on the OEM rotors are partially blocked by the floating pins which are centered on the rotor and supported by cast flanges on the Aluminum mounting hat. This reduces the overall effectiveness of the pumping ability of the OEM vanes. Here's a post showing the OEM vs. AP vane design/clearance:
http://www.m3post.com/forums/showpos...91&postcount=1

As for thermal mass, the OEM front rotor is 360x30 mm whereas the AP front rotor is 368x36 mm - significantly more thermal mass along with more vanes on the AP rotor (72 curved vanes).

OP - glad to hear you had a great time during your first track day This is when things start to get really expensive
Do you know how many vanes on stoptech 380 rotor? I love APs design while Stoptech is lot cheaper. I saw so many corvette on the track day has stoptech kit. And those cars have more than 600whp..
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