RR Racing Brake Development -- Competition and Street

[Rafi@RR-racing]

Originally Posted by ka-t_240

I typically run 200tw tires for most events. I have 2 events per year that I usually plan on r comps(Hoosier a6) for autox and time attack. The rest I run in street classes. My plan was to order dtc60s originally.

Looks like the end bp20 has a higher temp rating and a slightly friction rating, but only at the high heats. Are the compounds with letters the hawk products?

Would you say that the lower initial friction rating would result in a bit less intitial bite?

Dust,noise, etc don't bother me. The sacrifice is worth it when it comes to proper track performance.

A lot of guys run DTC-60 or equivalent on stock brakes because the stock rotors do not have sufficient thermal capacity, and therefore overheat the pads -- so you need to run a higher temp pad on stock rotors.


With our 330mm rotors, that is not necessary unless you are doing more sustained endurance efforts on race rubber.


Lets put it this way, we ran BP30s on the Element Time Attack FRS, we Phil was really impressed with the shear braking power of this setup. And keep in mind, Phil's car is just a bit on the extreme side:-)


That said, BP30's run friction coefficient of about 0.62, and DTC60's are about 0.75 --- we had DTC60's with us to try, but it was pointless, we did not need that kind of friction, and using the DTC60s would reduce our pedal pressure too much.


BP20's will feel like they lack bite until they get up to temp, otherwise they feel great.


I would try BP20's first, I think you will be happy. The next incremental step up if you feel any fade is "Compound J," followed by BP30's.


Rafi

[ka-t_240]

Replacement pads for the bp20 are only $86ish? Was just looking thru your website.

[ka-t_240]

Has anyone tried fitting these under the stock wheels?

[SubaruLifer]

Originally Posted by ka-t_240

Has anyone tried fitting these under the stock wheels?

One of the earlier posts in this thread:

Originally Posted by Rafi@RR-racing

That's a good question, generally the Stage II and IV will not fit stock rims because they use much wider calipers to accommodate thick pads.


So if you want maximum clearance, you need to go with Stage I or Stage III which use the more narrow caliper. Rear should fit no problem with stock wheels.


That said, for the front, even with the Stage I or Stage III, you will still need approx. 10mm spacer for stock wheels.


You can download the wheel fitment templates off of the description page of each brake kit on our site.


-Rafi

[Rafi@RR-racing]

Originally Posted by ka-t_240

Replacement pads for the bp20 are only $86ish? Was just looking thru your website.

That's one of the nice things with these pads. They are a very common pad configuration that fits many different Wilwood, AP, and other manufacturer's calipers.


Don't be fooled by the relatively low price, these pads are really good.


Rafi

[Panman]

@Rafi@RR-racing - You have email from me regarding my delivery.

[ka-t_240]

Besides the caliper clearance/pad thickness, are there any differences the stage 1 vs stage 2? One caliper stronger than the other,one better at heat disipation, ect.

[Rafi@RR-racing]

Originally Posted by ka-t_240

Besides the caliper clearance/pad thickness, are there any differences the stage 1 vs stage 2? One caliper stronger than the other,one better at heat disipation, ect.

Both Stage I and II calipers use the same forged construction, and are the same except for:


(1) Stage II calipers accommodate thicker pads. Stage II pads are 0.8" thick, and Stage I pads are 0.65" thick. Thicker pads reduce heat transfer and last longer.


(2) Stage I calipers are powder coated red or black, Stage II are black anodized. Powder coating looks great, but is not as durable as anodizing for those who track their cars.


(3) Stage I calipers require less wheel backspacing than Stage II calipers.



-Rafi

[ka-t_240]

Originally Posted by Rafi@RR-racing

Both Stage I and II calipers use the same forged construction, and are the same except for:


(1) Stage II calipers accommodate thicker pads. Stage II pads are 0.8" thick, and Stage I pads are 0.65" thick. Thicker pads reduce heat transfer and last longer.


(2) Stage I calipers are powder coated red or black, Stage II are black anodized. Powder coating looks great, but is not as durable as anodizing for those who track their cars.


(3) Stage I calipers require less wheel backspacing than Stage II calipers.



-Rafi

Thank you, that was my assumptions in the differences between each. I was liking the thicker pads, as that is thicker than most pads for the OEM calipers. As someone who has had the joy of experiencing boiled fluid, I am all about preventing that. I would assume the extra clearance between the stage 1 and 2 would be thinning up the caliper in the center, thus the thinner pads and extra wheel clearance.





The narrow version should see any negative impacts in the ability to handle stress or heat from being "narrow", should it?

[ModinJapan]

We have special pricing on these, pm us for more information!

-Josh

[DAEMANO]

Originally Posted by ModinJapan

We have special pricing on these, pm us for more information!

-Josh

PM price for Stg 1 & 2 kits shipped to 92704 pls

[Rafi@RR-racing]

Originally Posted by ka-t_240

Thank you, that was my assumptions in the differences between each. I was liking the thicker pads, as that is thicker than most pads for the OEM calipers. As someone who has had the joy of experiencing boiled fluid, I am all about preventing that. I would assume the extra clearance between the stage 1 and 2 would be thinning up the caliper in the center, thus the thinner pads and extra wheel clearance.





The narrow version should see any negative impacts in the ability to handle stress or heat from being "narrow", should it?

The narrow version was mainly designed for added wheel clearance, but I will tell you that it will easily handle ANY street application and MOST track applications. But if you happen to have wheels with sufficient backspacing, I recommend the wider Stage II/IV calipers, it will be that much better, not to mention that the pads will last much longer.


Rafi

[ModinJapan]

Originally Posted by DAEMANO

PM price for Stg 1 & 2 kits shipped to 92704 pls

You've got PM!

[Panman]

Rechecked my templates today for my Stage I kit - both my RPF-1 +35 and Desmond Regamaster 17x8 +35 will clear.