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Going to get back on the track after many years away. My car is 67S with "S" aluminum calipers up front & OEM "L" calipers in the back. I plan on using setup for street use and for track events. Car is 2100 pounds with 210 HP and I have a balance bar at the brake pedal.
Suggestions?
Here's my thoughts:
Pads for track and with a lightweight vintage 911 = Porterfield R4-1. AP45T-R4-11 for the front and AP30-R4-1 for the rear. These are their "Vintage Racing" pads. They have the highest friction numbers I've seen across all temperature spectrum's. They will squeal like a pig however.
The Castrol should be fine. The only material sheet I saw on that product didn't really cover temps. well but, I recommend Castrol for most street driven Porsche's and ATE Type 200 (same as the blue stuff just in the straw color) for racing.
Balance bar - I doubt one would be needed because your bias is still set at the factory with the 48mm fronts and 38mm rears. You are at 1.6:1. I would be cautious at limiting front pedal in an effort to gain more rear. All things considered, your balance bar should play out fairly equal. Again, be careful raising the rear bias any more than it is. As you know, these things can rear their ugly tail quickly. ;)
The new VB911-SWB caliper solution would be a great addition to this car. It keeps the bias the same but gives you slightly more rear pad.