rusoman Posted May 2, 2021 Share Posted May 2, 2021 Any temperature figure for autocross? Does it get up to 300°F? I want to know if Hawk DTC-70(300°F to 1800°F) or Carbotech XP24(400°F to 2000°F) will work. I use RE-71R as my tires. I'm using my car for the track as well that's why I want aggressive pads, I just want to make sure I could still stop at autocross. Link to comment Share on other sites More sharing options...
donrolandofurioso Posted May 3, 2021 Share Posted May 3, 2021 Rusoman, I don't think anybody can tell you how hot your brakes will get during Autoslalom. The temperature completely depends on ambient temperature, weather (including rain), track layout, the weight of your car and your agressivness. Since you need your car for everyday driving in traffic, and there is no guarantee that careful driving prevents you from having to demand shortest stopping distance based on an emergency, I would suggest that you do what most people do: buy a street/track pad. And then watch how it meets your needs. City driving requires different pads than Autoslalom. And track driving often needs something different again. Racing is a lot of trial and error. Put some pads in, and measure your brake temperatures with a digital thermometer. You will find your answers that way. Link to comment Share on other sites More sharing options...
rusoman Posted May 3, 2021 Author Share Posted May 3, 2021 I'm gonna put on a different rotor and pad for the street don't worry about that. I'm just wondering if anyone have ever checked the brake temperature on their car to get an approximate temperature figure. Link to comment Share on other sites More sharing options...
David Klassen Posted May 3, 2021 Share Posted May 3, 2021 1 hour ago, rusoman said: I'm gonna put on a different rotor and pad for the street don't worry about that. I'm just wondering if anyone have ever checked the brake temperature on their car to get an approximate temperature figure. It’s difficult to get a temperature at the point of friction of pad/rotor. In 2019 with stock rotors and performance street pads I’ve measured 600+ degrees F on the rotor, after 10 minutes of hard running track time, and a cool down lap. At that point my wheels had also soaked up some of the heat and were too hot to handle. On a warm day I’d have to limit my run time, my RBF600 brake fluid would boil and I’d loose braking In 2020 I installed a ‘big brake kit’; larger, 2 piece, slotted, well ventilated rotors; Carbotech XP10 pads on the front, XP8 on the back; titanium brake pad shims (thin sheet of titanium placed between the pad and the caliper piston, reduces the heat transfer from pad to caliper). After 15 minutes of hard running, warm day, and a cool down lap, 450 degrees F on the rotor, no fluid boiling, no brake fade. Link to comment Share on other sites More sharing options...
rusoman Posted May 3, 2021 Author Share Posted May 3, 2021 1 hour ago, David Klassen said: It’s difficult to get a temperature at the point of friction of pad/rotor. In 2019 with stock rotors and performance street pads I’ve measured 600+ degrees F on the rotor, after 10 minutes of hard running track time, and a cool down lap. At that point my wheels had also soaked up some of the heat and were too hot to handle. On a warm day I’d have to limit my run time, my RBF600 brake fluid would boil and I’d loose braking In 2020 I installed a ‘big brake kit’; larger, 2 piece, slotted, well ventilated rotors; Carbotech XP10 pads on the front, XP8 on the back; titanium brake pad shims (thin sheet of titanium placed between the pad and the caliper piston, reduces the heat transfer from pad to caliper). After 15 minutes of hard running, warm day, and a cool down lap, 450 degrees F on the rotor, no fluid boiling, no brake fade. I meant autocross brake temperature. Link to comment Share on other sites More sharing options...
David Klassen Posted May 3, 2021 Share Posted May 3, 2021 Others would have to chime in here. I haven’t measured, I’m guessing here: Since it’s only one lap, done in about a minute, with no heavy braking from high speeds, I can’t see that it would be very high. I was mostly addressing your brake fire on track day. 1 Link to comment Share on other sites More sharing options...
justkickin Posted May 4, 2021 Share Posted May 4, 2021 On 5/2/2021 at 12:31 PM, rusoman said: Any temperature figure for autocross? Does it get up to 300°F? I want to know if Hawk DTC-70(300°F to 1800°F) or Carbotech XP24(400°F to 2000°F) will work. I use RE-71R as my tires. I'm using my car for the track as well that's why I want aggressive pads, I just want to make sure I could still stop at autocross. Those are track pads, you will not get them nearly hot enough to be fully effective at autox. The preferred Hawk pad for autox would be the HPS or HP+ depending on what your priorities and what you drive. For the Carbotech, you are looking more along the lines of an AX6. I run EBC Blues at autox, and would swap in RP's or the DTC for track days. On National level courses, you are only touching the brakes to change balance and rotate the car. At St Andrews you have big stops at the pivots, kind of like turn 3 in Gimli, but from half, or lower, the velocity. And like others have mentioned, most autox racers don't measure brake tempertaure because they don't get that hot. You are on course for 60 seconds or less, and then you park for 5 minutes or more. Compared to lapping, where you can be on course and repeatedly braking heavily for 5+ minutes. It just isn't the same and the hardware requirements are significantly differently. 1 1 Link to comment Share on other sites More sharing options...
Jjames204 Posted May 4, 2021 Share Posted May 4, 2021 I run the same type of car (06 civic si). You can run oem brakes at autocross and never had brake fade. As @justkickinsaid there is not enough braking for you to require them. I used the Hawk hps this past weekend at HPDE and didnt have any fade till the last 2 laps. If you plan on tracking the car get 2 sets of pads and rotors and swap out. Autocross is basically a hard brake on the street, you do not go over 100km/hr. Hard braking is minimal. I would recommend a pad like hp+ and see how they are for your driving. They can handle track days. If you do plan on doing more tracking then you can always go to the harder pads. The other thing you should change out if your brake fluid if you are going to the track. Look at a dot4 min, most do motul rbf660. 1 Link to comment Share on other sites More sharing options...
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