Has anyone who is using Karcepts hubs pushed them to the point of “failure”? How much longer do they last? I have them for 2 seasons of 23 HPDE events and debating if I still should replace them for
peace of mind. No noises

 

I'm gonna push mine to failure. The last two times my hubs failed, I could very clearly hear them and had no issues getting them replaced before something catastrophic happened. That said, I wonder if my hubs will last longer now that I have stoptech ST42s in the rear. I got tired of all of the rear brake issues, from Urge to RX8 calipers, so I decided I was finally ready to ditch the parking/E-brake and went full BBK in the rear. Between that and the karcepts hubs, hoping I get like 50+ days out of this. LOL

 

I use the element hubs. You have to use the factory Honda ones (aftermarket brands don’t fit. I’ve also shaved down the back side of the upright a little bit to ensure clearance.

 

Just picked up Urge BBK. What kind of issues did you have with them?

 

Urge, rear brakes?

My experience was the pads had equal or less life than the solid 1-piece OEM rear rotor. I think the issue is that you have to shave the pads down so much to accommodate the thicker rotor that you end up reducing the thermal capacity of the rear pads and actually accelerating wear.

Brake pad wear rate is not linear with regards to pad material. A pad with 50% material has less than 50% life left. This is because brake pad wear rate has an inverse exponential relation to pad material. The less pad material you have, the faster the wear rate, which is due to a lower thermal capacity. So, the pad reaches its threshold thermal capacity limit much quicker and then begins even more accelerated wear once that capacity is exceeded.

The Urge 2-piece rotor doesn't shed heat fast enough to save the pad, especially if the mechanism I described above occurs in a single heavy braking zone where you're on the brakes the entire time.

And, when you buy new pads - guess what? You need to shave them down again - really disliked having to do that.

 

Pardon me but can’t you stagger the pads? Use one fresh pad and one used pad? It’s still a sliding bracket right? Is it a performance issue? Or do they still burn up too fast anyway?

 

Performance issue. You'll end up burning out the thinner/shaved/used pad super super fast and likely have it on the backing plate - my results when I tried that strategy.

 

Rear pad life has not been an issue for us. As shown in the data below, the S2000 rear brakes run hot and cool at a much slower rate than the fronts. This heat soaking does nothing good for the bearings and hub fatigue life. The plan is to run the Urge kit in the rear this year and compare the temperatures.

Note that there are three temperatures per rotor: Insider, Middle, Outside

 

Just wanted to note for anyone referencing this thread, the “OEM Upgrade” hubs (Honda front hubs for other models, part no. 44600-S47-000 ) do not work with the URGE ventilated rotors. The diameter of the hub is too large for the rotor hat, and there is a ridge on the OEM hub that would prevent the rotor from sitting flush.

looks like Karcepts is the only option for upgrading.

 

Sigh..I went with this advice and picked up a set of Dorman 930-027 front wheel hubs. I got them pressed in and they are too wide for the rear S2000 rotor hats. These definitely did not work. Now I have to go through the rework of having them taken back out

I bought these: