It would have been easy to trigger a scope from the brake switch and plot the deceleration & stopping distance with the OE pads and AX6 (both cold and warm). Not going to the hassle of putting the old pads back to do it though!
Doesn't the VMS have that capability? It does have an accelerator and can register G's.... It does register acceleration so I'm guessing deceleration.... I turned that screen off but possibly if someone's interested they can check it out.
Does anyone have any input on Bobcat/1521 vs. AX6 in terms of noise?
My car currently has squeaky wheels, and when I attempt to fix that problem, I figure I might as well replace the pads at the same time. I don't *plan* to track the car, but anything could happen, and I do tend to overdrive the car on the street anyway. However, I'm very regen-aware, and barely ever use the friction brakes in normal day-to-day driving. The car will be kept outside, and in Southern California, where the weather will rarely make the brakes very cold.
So, mainly, I'd like cold stopping power and as little noise as possible. Would the 1521s offer enough of an improvement over the AX6s to make it worthwhile, or is the extra stopping power on the AX6 just that good?
Another very nice feature is that they clean the rust off the rotors in normal driving, without you having to do hard stops once a week. That is a big problem with the stock pads.
How is this possible without the brakes dragging/reducing efficiency/making noise? Or do you mean that just the few times you do use the brakes, they clean the rotors better than the stock pads?
Unfortunately the Roadster's brakes last so long none of us have used both to know for sure. As wiztecy said I am thrilled w/ my 1521's. No noise and no dust yet they haul the car down fast whenever I need it to. My car is a daily driver and I also rarely use the brakes except when traffic does something stupid and I need the brakes RIGHT NOW. The stock brakes gave me a few moments when I would be standing on the pedal and the car was barely slowing down.So, mainly, I'd like cold stopping power and as little noise as possible. Would the 1521s offer enough of an improvement over the AX6s to make it worthwhile, or is the extra stopping power on the AX6 just that good?
3) Change out the heat conductive aluminum caliper pistons for the high performance stainless steel ones that Rob has and suggested. I have pics below of them.... The aluminum is hurting and heating the brake fluid, it contributes to brake fade. You can see the cups cut-out in the Stainless ones in the pic, that allows the hot air built up in the piston cup to escape. Makes sense.... should be like that from stock as well as stainless!
Hmm... I hate to question the wisdom of somebody with Rob's experience but... I'm not convinced this makes sense unless you track your Roadster or are otherwise heating the brakes excessively. For normal street driving the Roadster has a problem with not heating the brake fluid enough because the brakes are rarely used heavily due to regen. Brake fluid is designed to absorb moisture. Normally this moisture evaporates off when the fluid is heated from braking but we almost never heat it up enough to do that. The result is that the Roadster absorbs moisture at a faster rate than it can evaporate, which is why it often turns into a thick sludge faster than most other cars without regen. I change my brake fluid every year for this reason. Tesla recommends every year for the Roadster.