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Originally Posted by Paulman
Definitely a viable choice to save money up front with the base stock setup, see how it goes with good pads and fluid, then upgrade later as others have done here like DPEVANS. He had good pads complimented with good tires.
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It's worth mentioning that the grippier your tires on track, the more heat the brakes will have to shed. OTOH, it's also worth mentioning that you don't have to late-brake-bonzai every corner of every lap in a non-competition HPDE event. You can extend your braking distances a bit and then make every third or fourth lap a "personal best" attempt, which helps reduce the load on the brakes during a full session.
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The only info I can find is the V6 1LE doing very well with its 4 piston caliper setup at the Lightning Lap competition.
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I don't know how many continuous laps they do for those tests: if it's only maybe three before a cool-down lap, then it's not going to torture the brakes like a 20-minute session with all full-bore laps would. Still, it's important to keep in mind that even the "base" 4-piston setup is worlds better than any brakes on cars from 80s and probably even 90s. For example, a 90s-era 1LE or Corvette ZR1 still came with two-piston PBR sliding calipers, and yet somehow they managed to road race those things in sprint and endurance showroom-stock classes. We are spoiled these days.
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Since the V6 is lighter I’m wondering if 6 piston calipers are overkill and add too much weight up front. This option would be financed into the price but it would be warrantied and save me some wrenching time.
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Good questions, I just don't have the good answers. Someone would ideally run the two brake setups on otherwise-identical cars for a lapping session. If anyone has tried that, I haven't seen it. Next best would be the same car on the same track with the same driver before and after going from stock V6 brakes to the 6-piston upgrade. That driver would have a good sense of how much the upgrade improve braking capacity over a session. It would be worth searching the forum here to see if anyone ever wrote up a review like that.