Measuring Braking Temps
Redid all the brakes, rotors, pads, fluids, and after ONE 15 minute session and ONE 10 minute light session on the same track, they were the infamous brown color.
Theoretically, the opposite should have happened, no? I had Ti shims the second time, with much, much less time on the track. For whatever reason, both the calipers and the rotors got way hotter this go around than last time. No idea why.
Yeah but you also had different pads on the car. Didnt you lose brakes the first go around? Im guessing your S/S pads were able to handle the heat better before giving up relative to your first go around...what pads did you have on when the calipers stayed red?
that said, it's obvious for whatever reason, the new set up of DBA rotors and s/s pads got way, way hotter. ambient temps were actually 15-20 degrees cooler this last go around too... why?
stock pads - and no, the s/s pads did not hold up better - or at least, longer. the STOCK pads actually made it through 3 sessions without fade - fade only came when I destroyed the pad material itself.
that said, it's obvious for whatever reason, the new set up of DBA rotors and s/s pads got way, way hotter. ambient temps were actually 15-20 degrees cooler this last go around too... why?
that said, it's obvious for whatever reason, the new set up of DBA rotors and s/s pads got way, way hotter. ambient temps were actually 15-20 degrees cooler this last go around too... why?
Ahh right stock pads. Well that makes sense then since the stock pads are rumored to be the DS2500's and the S/S is very similar...
So same track I cant see ambient temps mattering much TBH and in your case the temps were cooler so thats to your benefit. Maybe you stepped up your game instead of dinkin around on your typical Sunday stroll?
Or maybe the Ti shims do keep the heat in the caliper in which case is what it is better there than your fluid. But just means you need a better(track oriented) pad which we all knew all along.
So same track I cant see ambient temps mattering much TBH and in your case the temps were cooler so thats to your benefit. Maybe you stepped up your game instead of dinkin around on your typical Sunday stroll?
Or maybe the Ti shims do keep the heat in the caliper in which case is what it is better there than your fluid. But just means you need a better(track oriented) pad which we all knew all along.
right, but just strange how different the temps were. obviously no way of measuring, but it must have been a significant difference. ti shims keep the heat in the pad/caliper, but I don't know how much of that can be attributed to it. also not sure what temp & duration the brembos change color at..
took it fairly easy the first session out, which is when everything happened. actually I have a different theory - higher friction on the new pads compared to the old ones, = much higher heat, even in that short time. does that theory hold any water?
but remember when you got beat by those miatas?
but remember when you got beat by those miatas?
Heat comes from slowing the car down with the brakes, converting kinetic energy into thermal energy. The more energy conversion going on (slowing down at a faster rate, or from high speeds), the more heat they make. The level of friction they generate doesn't necessarily correlate with how much heat they make.
Heat comes from slowing the car down with the brakes, converting kinetic energy into thermal energy. The more energy conversion going on (slowing down at a faster rate, or from high speeds), the more heat they make. The level of friction they generate doesn't necessarily correlate with how much heat they make.
Lol it was a fast Miata, I swear!
So that's an interesting point. If the pads can generate more friction yes they will generate more heat but assuming the tires have enough grip it translates to the car slowing down quicker. The quicker you get off the brakes the less heat they will generate. So Im not sure it can be associated with that.
However, I suppose if they have a higher μ and youre taking advantage of that then the temps could spike for that short period.
So thinking out loud here...what is harder on brakes? Braking late and hard or braking sooner and slower i.e longer braking period but less aggressive? I always brake late and hard because I think if Im braking slowly then thats precious time that could be better spent accelerating. Of course braking early has its advantages but I guess its all irreverent now that I think about it and type this. Regardless if you brake early or late if the force is the same then the heat generated is the same. So the real question is does a longer braking period generate more heat vs a short hard brake?
So that's an interesting point. If the pads can generate more friction yes they will generate more heat but assuming the tires have enough grip it translates to the car slowing down quicker. The quicker you get off the brakes the less heat they will generate. So Im not sure it can be associated with that.
However, I suppose if they have a higher μ and youre taking advantage of that then the temps could spike for that short period.
So thinking out loud here...what is harder on brakes? Braking late and hard or braking sooner and slower i.e longer braking period but less aggressive? I always brake late and hard because I think if Im braking slowly then thats precious time that could be better spent accelerating. Of course braking early has its advantages but I guess its all irreverent now that I think about it and type this. Regardless if you brake early or late if the force is the same then the heat generated is the same. So the real question is does a longer braking period generate more heat vs a short hard brake?
We run our own stainless steel pistons we designed along with titanium shims and never have brake fluid boiling issues anymore. We run Castrol SRF brake fluid. This is all without brake ducts as well.
Dan
Dan
