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      01-24-2021, 08:57 PM   #9
HP Autosport
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United_States
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Drives: F80 M3
Join Date: Mar 2007
Location: Santa Barbara, AP Racing, Brembo, GIAC, Nitron, Ohlins, Pagid, www.hpautosport.com

iTrader: (36)

Quote:
Originally Posted by CarJunkie View Post
I learned the hard way that increased horsepower and a square setup with R-comp tires will destroy OEM sized rotors. I had hoped that fully floating PFC-V3 rotors would be up to the task with proper pads. I cracked a new set within 5 lapping days. Harold at HP Autosport helped with documentation, but PFC looked at the pictures and determined I had taken them beyond their designed operational temp. No warranty. FWIW, I swapped my OEM rotors back on for the final track day of the season and they held up better. I really don't want to deal with installing and maintaining brake ducts....but if it remains necessary, I will.

I considered the AP racing 372mm front setup with OEM rear, but my rear calipers are showing their age and I would prefer a set-up that comes balanced. Brembo 380mm front set won't clear my track wheels. Stoptech 380mm with ST60 6-pot calipers will. Stoptech it is.

As a show of good will (having just bought the PFC rotors this year) Harold gave me a great deal on a Stoptech Trophy Sport BBK, which I finally had a chance to install today.

During the bed-in procedure, it became abundantly clear that these stop the car very well. The second set of decelerations were very impressive with no fade even on rep #10. There is no doubt I could autocross with the street pads, something I could not do confidently with the OEM system using OEM pads or PFC Z-rated. I went for another drive this evening and can say enough about the pedal feel. I can't wait to head to the track with the "Club Race" pads.

Shout out to HP Autosport for awesome service!

Pics: front before and after, front and rear with the 359's, and a closeup following the bed-in....nice blue hue!
BBKs are looking good!

The 309 prefix sport pads will do good for all around use, including autocross.

For track duty you will want something more aggressive like the Stoptech's SRT 32 or 33.

Ferodo DS1.11 is also an excellent choice if you want a pad with a super flat torque curve and extended wear characteristics.
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