MasterC17
Active Member
Excuse my ignorance here but if the bias difference between the three caliper types is that small then what is the benefit of the S or PUP calipers over stock?
Also since you've measured it what is the actual size delta between the stock and PUP calipers?
General Rule of Thumb: Tires are the limiting factor to how quickly a car can come to a complete stop, not the brakes. All the aforementioned brakes have the capacity to overwhelm any tire you can put on this car. The key to brakes is how long they can do it before they overheat. The PUP Caliper uses a larger rotor and a larger brake pad than the non PUP Calipers. That means it will take a lot more abuse/use before it overheats and stops (stopping) the car. The S Calipers use a very similar pad and rotor as far as diameter is concerned, but the S rotor is 7mm thicker than the 3 PUP rotor. In theory, the thermal capacity of the S rotor is higher than the 3 PUP rotor (all else equal). The ideal brake bias would be exactly the same regardless of the brake setup. Now, I personally don't know what that exact brake bias is. But effectively, the "best" brake bias is one that causes the front brakes to lock up JUST before the rears do. You DO NOT want the rear brakes to lock up first. Every car will have a slightly different ideal brake bias. The point I was making is that there is such a small difference between the three calipers that it should have no affect on how the ABS system operates.