conclusive on-track testing of Speed Engineering Directional Vaned Brake Rotors
05-11-2011, 12:06 PM
#21
Registered User
Originally Posted by Croc' timestamp='1305098826' post='20562389
i think this graph says it all - after heavy braking these rotors cool down much quicker than stock ones.
just to reconfirm - cooler rotors means less brake fading?
or pads are those which play more important part in fading?
just to reconfirm - cooler rotors means less brake fading?
or pads are those which play more important part in fading?
-- Chris
05-11-2011, 04:49 PM
#25
Former Sponsor
Thread Starter
05-11-2011, 04:52 PM
#26
Former Sponsor
Thread Starter
05-11-2011, 05:08 PM
#27
Former Sponsor
Thread Starter
Excellent testing. 
However, the testing isn't quite conclusive for us so-cal s2k challenge drivers. Would you be able to perform additional testing in the future? Most of the socal drivers are fading XP12 pads with brake ducting, so if these rotors combined with ducting could prevent that, I believe it would tip the scale toward spending the extra dollars for these rotors. Depending on the track, we see braking from 130+ to ~45 [ACS] to 105+ to ~45 [SoWS] to 110+ to 70 [braking into Lost Hill at Buttonwillow]. Your testing is seeing speed differentials that unfortunately don't cover all of our braking ranges
Regardless, these rotors clearly run cooler than OEM and OEM style rotors, which is exactly what a lot of people are looking for
Also, I was looking at the equipment that you were using to measure temps. Do they make equipment that can measure higher than 1000F?
Thanks again for the testing! This is what every manufacturer needs to do.
However, the testing isn't quite conclusive for us so-cal s2k challenge drivers. Would you be able to perform additional testing in the future? Most of the socal drivers are fading XP12 pads with brake ducting, so if these rotors combined with ducting could prevent that, I believe it would tip the scale toward spending the extra dollars for these rotors. Depending on the track, we see braking from 130+ to ~45 [ACS] to 105+ to ~45 [SoWS] to 110+ to 70 [braking into Lost Hill at Buttonwillow]. Your testing is seeing speed differentials that unfortunately don't cover all of our braking ranges
Regardless, these rotors clearly run cooler than OEM and OEM style rotors, which is exactly what a lot of people are looking for
Also, I was looking at the equipment that you were using to measure temps. Do they make equipment that can measure higher than 1000F?
Thanks again for the testing! This is what every manufacturer needs to do.
Regarding your brake fade, you may wish to consider upgrading your fluid. Remember that a very aggressive pad like XP12 produces more brake torque = friction = heat. In my experience, the XP10 / 8 combination is the best combination for the racing we do, and what I suspect you do too. It provides more than enough brake torque for the weight of the S2000 and is not excessive in heat.
Yes, higher range sensors are available. However, you'll need to limit the cold end of the range or have reduce resolution. Expect to pay $1000-2000 for this.
Thank you for your comments & thumbs up, we appreciate it.
-- Chris
05-11-2011, 05:24 PM
#28
Remember that a very aggressive pad like XP12 produces more brake torque = friction = heat. In my experience, the XP10 / 8 combination is the best combination for the racing we do, and what I suspect you do too. It provides more than enough brake torque for the weight of the S2000 and is not excessive in heat.
anyway, if you're right that ducting makes little difference (and that would be contrary to what many others say), then it could be assumed the results of running your test over with brake ducting would produce the same results.
i haven't seen much empirical evidence of how much brake ducting affects temps. perhaps someone here would have some numbers.
05-11-2011, 05:39 PM
#29
Good job testing!
I can't say that I'm surprised with the results. Directional vanes provide a MUCH lower pressure in the center of the rotor and pull a lot more air through them. However, I have ducting, and its ducting done right with the air only going to the center of the rotor so that all of it is used to cool the entire rotor. I'm hard pressed to believe that these without ducting would run cooler, and I be willing to bet a set of them that they would not. That doesn't mean I don't see a market for them...for people that don't want to have to run ducting, they make sense.
Now that this test is out of the way, and proves they are superior, the real test has to be done. How they actually compare in rotor life and pad life vs. the cheap C-teks...after doing ducting I improved my pad life over 300%, and haven't found out about rotor life yet.
I can't say that I'm surprised with the results. Directional vanes provide a MUCH lower pressure in the center of the rotor and pull a lot more air through them. However, I have ducting, and its ducting done right with the air only going to the center of the rotor so that all of it is used to cool the entire rotor. I'm hard pressed to believe that these without ducting would run cooler, and I be willing to bet a set of them that they would not. That doesn't mean I don't see a market for them...for people that don't want to have to run ducting, they make sense.
Now that this test is out of the way, and proves they are superior, the real test has to be done. How they actually compare in rotor life and pad life vs. the cheap C-teks...after doing ducting I improved my pad life over 300%, and haven't found out about rotor life yet.
05-11-2011, 05:43 PM
#30
anyway, if you're right that ducting makes little difference (and that would be contrary to what many others say), then it could be assumed the results of running your test over with brake ducting would produce the same results.
i haven't seen much empirical evidence of how much brake ducting affects temps. perhaps someone here would have some numbers.
i haven't seen much empirical evidence of how much brake ducting affects temps. perhaps someone here would have some numbers.
Ducting would not have as large of an effect on THESE rotors, but that is because the main open area where the air enters the center of the rotor is on the outside face...you'd have to bring the ducting outside the wheel to get the same effect
most of the benefits of this rotor is in the vanes.